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Analysis

  • max time kernel
    118s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/01/2025, 01:06

General

  • Target

    BstkDDU.dll

  • Size

    451KB

  • MD5

    5ea0e72799f7ab9d3f426f77e02499f5

  • SHA1

    03f91e09564f19f99953d82924d3437df3de5b8d

  • SHA256

    f7a3464b99eff79164de42b98a8d3bc3944c758386d5e446541030e205501049

  • SHA512

    e0ca46a585e434fdc6ba735afe94f73dbb3ff4b8b97b32801f8d20739e869c4f41e5287dd9fc90a0cb3f8d1a25e004cd0335a7b43cdae53959d79f92e0e3b836

  • SSDEEP

    12288:7RejOcRw0FRIOK9pcwWvni+Jr/cUkc8OIgWi9klTX:FcOcRwgRIDp6Z/cUkE9klTX

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.transotraval.cl
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    vIZ2P]dt&a!d

Signatures

  • AgentTesla

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

  • Agenttesla family
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\BstkDDU.dll,#1
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2388
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1968

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1968-0-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/1968-1-0x00000000753DE000-0x00000000753DF000-memory.dmp

    Filesize

    4KB

  • memory/1968-2-0x00000000055D0000-0x0000000005B74000-memory.dmp

    Filesize

    5.6MB

  • memory/1968-3-0x0000000005190000-0x00000000051F6000-memory.dmp

    Filesize

    408KB

  • memory/1968-4-0x00000000753D0000-0x0000000075B80000-memory.dmp

    Filesize

    7.7MB

  • memory/1968-5-0x0000000006460000-0x00000000064B0000-memory.dmp

    Filesize

    320KB

  • memory/1968-6-0x0000000006550000-0x00000000065E2000-memory.dmp

    Filesize

    584KB

  • memory/1968-7-0x00000000064E0000-0x00000000064EA000-memory.dmp

    Filesize

    40KB

  • memory/1968-8-0x00000000753DE000-0x00000000753DF000-memory.dmp

    Filesize

    4KB

  • memory/1968-9-0x00000000753D0000-0x0000000075B80000-memory.dmp

    Filesize

    7.7MB