General

  • Target

    cbda8606094d0493370b0f219edaba9be92444967aa9259d3e9323314dca2daa.exe

  • Size

    891KB

  • Sample

    240427-b1tbhsgc97

  • MD5

    d797aae1eaf481e9c887482192b84109

  • SHA1

    acf58b4eb3f0ffda9a2cd91def583422a11ed873

  • SHA256

    cbda8606094d0493370b0f219edaba9be92444967aa9259d3e9323314dca2daa

  • SHA512

    605151432227a27e70c7884a7300e2cda5450970a5bb67cb6139fb69ee1facbe2dc95799905080456db0549aa04e35870e4142aafbcb60aa175f9526f3f7753c

  • SSDEEP

    24576:4wzm9u/h4/YiCLuiq3crVdkwGdYCxUw/ATA:pmuhWYiCaivGWPwITA

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      cbda8606094d0493370b0f219edaba9be92444967aa9259d3e9323314dca2daa.exe

    • Size

      891KB

    • MD5

      d797aae1eaf481e9c887482192b84109

    • SHA1

      acf58b4eb3f0ffda9a2cd91def583422a11ed873

    • SHA256

      cbda8606094d0493370b0f219edaba9be92444967aa9259d3e9323314dca2daa

    • SHA512

      605151432227a27e70c7884a7300e2cda5450970a5bb67cb6139fb69ee1facbe2dc95799905080456db0549aa04e35870e4142aafbcb60aa175f9526f3f7753c

    • SSDEEP

      24576:4wzm9u/h4/YiCLuiq3crVdkwGdYCxUw/ATA:pmuhWYiCaivGWPwITA

    • 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

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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.

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks