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Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    14/12/2024, 01:10

General

  • Target

    K98766700.exe

  • Size

    589KB

  • MD5

    e39c7cf026df55a909a7e18eea93b027

  • SHA1

    1a41eb5df90bcc53c0a80ce38fa99747de6eb237

  • SHA256

    b862fbe92f3de0e033b66e3c9d3afad4d6ff41d8b3553094f66a98db6ba59f0c

  • SHA512

    711c3fddc4aaa37afa6f1c11ff426edfe19ebfae6d955abd23699887d9cf5f31038c2812ac526190d3c7d4fa7a094117be45d75acc6b16fd80c1d13d2eb426f6

  • SSDEEP

    12288:zVAf8axZKrGhdYzjLKUxlyQs6U2+8sq6hcBy+QjnHYyFhqaX3ub:GZKrudYzjL/xp95b6RbCaX3ub

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.antoniomayol.com:21
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    cMhKDQUk1{;%

Signatures

  • AgentTesla

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

  • Agenttesla family
  • UAC bypass 3 TTPs 1 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

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

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

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\K98766700.exe
    "C:\Users\Admin\AppData\Local\Temp\K98766700.exe"
    1⤵
    • UAC bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2712
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\K98766700.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2732
    • 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:2720
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2712 -s 804
      2⤵
        PID:2616

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2712-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

      Filesize

      4KB

    • memory/2712-1-0x0000000000AF0000-0x0000000000B88000-memory.dmp

      Filesize

      608KB

    • memory/2712-2-0x000000001AC20000-0x000000001ACB4000-memory.dmp

      Filesize

      592KB

    • memory/2712-3-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

      Filesize

      9.9MB

    • memory/2712-22-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

      Filesize

      9.9MB

    • memory/2720-4-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-6-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-15-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-13-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-11-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-9-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-8-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/2720-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2732-20-0x000000001B630000-0x000000001B912000-memory.dmp

      Filesize

      2.9MB

    • memory/2732-21-0x0000000002990000-0x0000000002998000-memory.dmp

      Filesize

      32KB