Windows
Analysis Report
SecuriteInfo.com.Win32.PWSX-gen.11592.10317.exe
Overview
General Information
Detection
AgentTesla
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Yara detected AgentTesla
Yara detected AntiVM3
.NET source code contains potential unpacker
Contains functionality to log keystrokes (.Net Source)
Drops VBS files to the startup folder
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Mail credentials (via file / registry access)
Uses ipconfig to lookup or modify the Windows network settings
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Allocates memory with a write watch (potentially for evading sandboxes)
Contains functionality to call native functions
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates a start menu entry (Start Menu\Programs\Startup)
Detected potential crypto function
Drops PE files
Enables debug privileges
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 inlined nop instructions (likely shell or obfuscated code)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
PE / OLE file has an invalid certificate
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Sigma detected: Suspicious Execution of Powershell with Base64
Sigma detected: Suspicious Outbound SMTP Connections
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Stores files to the Windows start menu directory
Uses 32bit PE files
Uses SMTP (mail sending)
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara detected Credential Stealer
Yara signature match
Classification
- System is w10x64
SecuriteInfo.com.Win32.PWSX-gen.11592.10317.exe (PID: 9124 cmdline:
"C:\Users\ user\Deskt op\Securit eInfo.com. Win32.PWSX -gen.11592 .10317.exe " MD5: CB7D56C1FF81BEEE3C754201E6962F74) cmd.exe (PID: 5624 cmdline:
"C:\Window s\System32 \cmd.exe" /c ipconfi g /release MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 7012 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) ipconfig.exe (PID: 7136 cmdline:
ipconfig / release MD5: 3A3B9A5E00EF6A3F83BF300E2B6B67BB) powershell.exe (PID: 8492 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -enc QQBkA GQALQBNAHA AUAByAGUAZ gBlAHIAZQB uAGMAZQAgA C0ARQB4AGM AbAB1AHMAa QBvAG4AUAB hAHQAaAAgA EMAOgBcAFU AcwBlAHIAc wBcAGEAbAB mAG8AbgBzA FwARABlAHM AawB0AG8Ac ABcAFMAZQB jAHUAcgBpA HQAZQBJAG4 AZgBvAC4AY wBvAG0ALgB XAGkAbgAzA DIALgBQAFc AUwBYAC0AZ wBlAG4ALgA xADEANQA5A DIALgAxADA AMwAxADcAL gBlAHgAZQA 7ACAAQQBkA GQALQBNAHA AUAByAGUAZ gBlAHIAZQB uAGMAZQAgA C0ARQB4AGM AbAB1AHMAa QBvAG4AUAB yAG8AYwBlA HMAcwAgAEM AOgBcAFUAc wBlAHIAcwB cAGEAbABmA G8AbgBzAFw ARABlAHMAa wB0AG8AcAB cAFMAZQBjA HUAcgBpAHQ AZQBJAG4AZ gBvAC4AYwB vAG0ALgBXA GkAbgAzADI ALgBQAFcAU wBYAC0AZwB lAG4ALgAxA DEANQA5ADI ALgAxADAAM wAxADcALgB lAHgAZQA7A EEAZABkAC0 ATQBwAFAAc gBlAGYAZQB yAGUAbgBjA GUAIAAtAEU AeABjAGwAd QBzAGkAbwB uAFAAYQB0A GgAIABDADo AXABVAHMAZ QByAHMAXAB hAGwAZgBvA G4AcwBcAEE AcABwAEQAY QB0AGEAXAB SAG8AYQBtA GkAbgBnAFw AcABhAGcAZ QAuAGUAeAB lADsAIABBA GQAZAAtAE0 AcABQAHIAZ QBmAGUAcgB lAG4AYwBlA CAALQBFAHg AYwBsAHUAc wBpAG8AbgB QAHIAbwBjA GUAcwBzACA AQwA6AFwAV QBzAGUAcgB zAFwAYQBsA GYAbwBuAHM AXABBAHAAc ABEAGEAdAB hAFwAUgBvA GEAbQBpAG4 AZwBcAHAAY QBnAGUALgB lAHgAZQA= MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) conhost.exe (PID: 8524 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) WmiPrvSE.exe (PID: 6840 cmdline:
C:\Windows \system32\ wbem\wmipr vse.exe -s ecured -Em bedding MD5: 60FF40CFD7FB8FE41EE4FE9AE5FE1C51) InstallUtil.exe (PID: 2080 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Ins tallUtil.e xe" MD5: 5D4073B2EB6D217C19F2B22F21BF8D57) cmd.exe (PID: 3804 cmdline:
"C:\Window s\System32 \cmd.exe" /c ipconfi g /renew MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 6364 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) ipconfig.exe (PID: 7024 cmdline:
ipconfig / renew MD5: 3A3B9A5E00EF6A3F83BF300E2B6B67BB)
wscript.exe (PID: 8604 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\Micro soft\Windo ws\Start M enu\Progra ms\Startup \page.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) page.exe (PID: 1364 cmdline:
"C:\Users\ user\AppDa ta\Roaming \page.exe" MD5: CB7D56C1FF81BEEE3C754201E6962F74) cmd.exe (PID: 1408 cmdline:
"C:\Window s\System32 \cmd.exe" /c ipconfi g /release MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 1836 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) ipconfig.exe (PID: 3384 cmdline:
ipconfig / release MD5: 3A3B9A5E00EF6A3F83BF300E2B6B67BB) InstallUtil.exe (PID: 2284 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Ins tallUtil.e xe" MD5: 5D4073B2EB6D217C19F2B22F21BF8D57) cmd.exe (PID: 2812 cmdline:
"C:\Window s\System32 \cmd.exe" /c ipconfi g /renew MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) conhost.exe (PID: 2836 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) ipconfig.exe (PID: 2984 cmdline:
ipconfig / renew MD5: 3A3B9A5E00EF6A3F83BF300E2B6B67BB)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Agent Tesla, AgentTesla | A .NET based information stealer readily available to actors due to leaked builders. The malware is able to log keystrokes, can access the host's clipboard and crawls the disk for credentials or other valuable information. It has the capability to send information back to its C&C via HTTP(S), SMTP, FTP, or towards a Telegram channel. |
{"Exfil Mode": "SMTP", "Port": "25", "Host": "mail.iaa-airferight.com", "Username": "admin@iaa-airferight.com", "Password": "manlikeyou88"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_AgentTesla_1 | Yara detected AgentTesla | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_AgentTesla_1 | Yara detected AgentTesla | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_AgentTesla_1 | Yara detected AgentTesla | Joe Security | ||
Click to see the 27 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
Click to see the 16 entries |
System Summary |
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Source: | Author: Jonathan Cheong, oscd.community: |
Source: | Author: Jonathan Cheong, oscd.community: |
Source: | Author: Florian Roth (Nextron Systems): |