General

  • Target

    ecb9115de92beb10b3344687dfe5a2147117302e02378f5592649d5761e33305.exe

  • Size

    891KB

  • Sample

    240612-czktesygld

  • MD5

    c21a03ba2040ef6de6b522ce779a8399

  • SHA1

    59a91fd925902d7d21829a5a4d57765f69db1369

  • SHA256

    ecb9115de92beb10b3344687dfe5a2147117302e02378f5592649d5761e33305

  • SHA512

    fa92469d362d41e16a19ce615a341c4b8fd07805f5175074cbffc182733537f51f71e972029037bdf782dfdfcb47be33b7d35ca350e777fe3d9c0b1dc9905327

  • SSDEEP

    24576:thFgZKs71DI5AGSHHZsxeosZWve9hDYwwppqO:zFgZKMXGSZsxeosZ6YN/O

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      ecb9115de92beb10b3344687dfe5a2147117302e02378f5592649d5761e33305.exe

    • Size

      891KB

    • MD5

      c21a03ba2040ef6de6b522ce779a8399

    • SHA1

      59a91fd925902d7d21829a5a4d57765f69db1369

    • SHA256

      ecb9115de92beb10b3344687dfe5a2147117302e02378f5592649d5761e33305

    • SHA512

      fa92469d362d41e16a19ce615a341c4b8fd07805f5175074cbffc182733537f51f71e972029037bdf782dfdfcb47be33b7d35ca350e777fe3d9c0b1dc9905327

    • SSDEEP

      24576:thFgZKs71DI5AGSHHZsxeosZWve9hDYwwppqO:zFgZKMXGSZsxeosZ6YN/O

    • 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 binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

    • 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 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