Analysis

  • max time kernel
    144s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:58

General

  • Target

    RFQ.exe

  • Size

    409KB

  • MD5

    d29fd374ffb5bd95937ed1084caefa8c

  • SHA1

    4320812a3197c17ad10d6c36608c740e9b89f2bd

  • SHA256

    f6c8c308519b9019ae0cce0d21759aea395e35f746b0a3853218ab321e8c8349

  • SHA512

    d5fb85fe82e71272a98b1ef88eac93480f4716e51fa173e3c3c8f858c1616edd53878b5582e80d67ef111cce3f50e25d39489c783c52370f38d169f345fd35b2

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    @jaffinmarknma@344

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2980
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\raVCZiroBTNk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2AB5.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4340
    • C:\Users\Admin\AppData\Local\Temp\RFQ.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3940

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\RFQ.exe.log

    Filesize

    408B

    MD5

    8adbb2cb7759fdcbc51cfbf0bfd7c867

    SHA1

    f7549e6ea430e7d64b3afb3fc27c77ed5122f85b

    SHA256

    c67092561e4b1472672374c3439004e2bc0191d9a901cde2b8b69a2d34dc6297

    SHA512

    f465311e884dd82e3152959b6a59ac8d6be0a056a1cfddabbcc6714079a2269cd5c09b2b8fbc87a9ec3323c531383526ae19ef24fed100dec80730fae0d79991

  • C:\Users\Admin\AppData\Local\Temp\tmp2AB5.tmp

    Filesize

    1KB

    MD5

    1777b2cf3141808c6d321eee004e4373

    SHA1

    c08cbb95ee94a8d33b12db06005de7c40368045a

    SHA256

    ab02ce745abd720665c4c09146ea1943d91dd47d03016302d0c053ede05626d8

    SHA512

    bf76c25ee37e854dabc433d92da538425f363479d8723c402c60c498dceabf7f2ac419a5760f1bc3cfba3cc917903f9f0786680e6a23fbaddf0ea35f253fcf5f

  • memory/2980-130-0x0000000074BC0000-0x0000000075171000-memory.dmp

    Filesize

    5.7MB

  • memory/3940-133-0x0000000000000000-mapping.dmp

  • memory/3940-134-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/3940-136-0x0000000074BC0000-0x0000000075171000-memory.dmp

    Filesize

    5.7MB

  • memory/4340-131-0x0000000000000000-mapping.dmp