General

  • Target

    21d43e545129ce81996e669b1d467c198594b16a05accd193a63a4d9f7173d3d

  • Size

    716KB

  • Sample

    240618-x51gaavekf

  • MD5

    1c55430ba0eb7f8b53d4830e3983a8a6

  • SHA1

    4452561b2ea4467bd17e200b7837df4900e485c5

  • SHA256

    21d43e545129ce81996e669b1d467c198594b16a05accd193a63a4d9f7173d3d

  • SHA512

    12fb9b153e1e7fef7005e0e7c7d2b35c0574563091465801f3b36de35d34bfbd1754b28af9e7a29d88d4f7e0b393ee3fdd8435669e42521e9b473f485602edb0

  • SSDEEP

    12288:CcbyCK2xrOoSkF84MmySSj3hWNBG2XAwAYzzK2p7R5eOI4Y29JYl2w1ojejomnz2:HyC5/FWmlSjR4BG21+yEO6aAtDq

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot7278611874:AAFZW7LnZRIdM0enPG1copjp2kGCdC9VBOk/

Targets

    • Target

      21d43e545129ce81996e669b1d467c198594b16a05accd193a63a4d9f7173d3d

    • Size

      716KB

    • MD5

      1c55430ba0eb7f8b53d4830e3983a8a6

    • SHA1

      4452561b2ea4467bd17e200b7837df4900e485c5

    • SHA256

      21d43e545129ce81996e669b1d467c198594b16a05accd193a63a4d9f7173d3d

    • SHA512

      12fb9b153e1e7fef7005e0e7c7d2b35c0574563091465801f3b36de35d34bfbd1754b28af9e7a29d88d4f7e0b393ee3fdd8435669e42521e9b473f485602edb0

    • SSDEEP

      12288:CcbyCK2xrOoSkF84MmySSj3hWNBG2XAwAYzzK2p7R5eOI4Y29JYl2w1ojejomnz2:HyC5/FWmlSjR4BG21+yEO6aAtDq

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks