General

  • Target

    495cd136db440b3d7721b351346ea34c6cf5d6db20a038d2681953b44f1a2a86.7z

  • Size

    662KB

  • Sample

    240612-brw12sxerk

  • MD5

    ba8496e733e3ac1b0f517b427d53e378

  • SHA1

    508663a5aadb42b7f813d92d49b01318f1e23119

  • SHA256

    495cd136db440b3d7721b351346ea34c6cf5d6db20a038d2681953b44f1a2a86

  • SHA512

    b15779d05923478ecfb8cb37ece8d1c1cf37044ecdca4fdd79795c59e0dceea9c3fe91debe94abcbdbca1107cfec30fab3d006afd363572c156d0047941c6603

  • SSDEEP

    12288:y8UER4dMlpy8eeQtDZxjXnvCbXGNMC3ZchWGtxPR6gWmf2wrk3zk:y8viMzypeQ3xriWyJhWKZy9ZY

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      PO 077-57676135.exe

    • Size

      714KB

    • MD5

      f8fe6881e21dcba5b78d693f96f56c6f

    • SHA1

      15bad9cbbc0bb09e66ab78929a5ce632da652b78

    • SHA256

      4210e25c33df901302fe42704fcd0832729e4efade9da5abe6a8f2512244024f

    • SHA512

      e0bf8b7105cc94bb126db2acabf321eccbcc26852ffb19c754bbb8f733d135c877c92adf05fc3c3e4efe923ee38ba26cfd25424b53c46e92e6b1381d64ebb77c

    • SSDEEP

      12288:wX0pxhV36Di8BtLExdWe2kD3nmXbvtbZGh/C3f+hwGsxNPigJNS2wrk80:tBFKKxYe2WnaFItrhwztlfO

    • 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

    • 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.

    • Adds Run key to start application

    • 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