General

  • Target

    7e051c3260cbe16adcf4752fe10d371aa474a588b884be6dcf4cc9c8070d0152.exe

  • Size

    757KB

  • Sample

    240502-b23lksfe69

  • MD5

    892fb9bb5abf753c1c1247f79b102510

  • SHA1

    549aa078391a0cd63831391bf8284e80b0c0f9a5

  • SHA256

    7e051c3260cbe16adcf4752fe10d371aa474a588b884be6dcf4cc9c8070d0152

  • SHA512

    3f2459ac3c612e7c68ce055d74e484f5697893e45e090f7f28a963d9b346c4d5013031872f1bfe296499fd31247170a0f4f48888e6766bf6f3b2eb47e89c9b3b

  • SSDEEP

    12288:S85d0XGTx04JFRvFzTFwzA8HngAsMnW7iBsHeljtDBScHzLb/UUl2B:pddTRJFTzT827iSHe0swUG

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot6701733689:AAGMmNWA2G1J2dS7tNzTXuPC1zohWE8wZcU/

Targets

    • Target

      7e051c3260cbe16adcf4752fe10d371aa474a588b884be6dcf4cc9c8070d0152.exe

    • Size

      757KB

    • MD5

      892fb9bb5abf753c1c1247f79b102510

    • SHA1

      549aa078391a0cd63831391bf8284e80b0c0f9a5

    • SHA256

      7e051c3260cbe16adcf4752fe10d371aa474a588b884be6dcf4cc9c8070d0152

    • SHA512

      3f2459ac3c612e7c68ce055d74e484f5697893e45e090f7f28a963d9b346c4d5013031872f1bfe296499fd31247170a0f4f48888e6766bf6f3b2eb47e89c9b3b

    • SSDEEP

      12288:S85d0XGTx04JFRvFzTFwzA8HngAsMnW7iBsHeljtDBScHzLb/UUl2B:pddTRJFTzT827iSHe0swUG

    • AgentTesla

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

    • UAC bypass

    • Windows security bypass

    • 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 packed with or use KoiVM

    • 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

    • 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.

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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