Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    12-12-2024 16:10

General

  • Target

    39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe

  • Size

    1.4MB

  • MD5

    5b22d7770f0a13b132abe8225d3d0840

  • SHA1

    95054ea7916a1c004972c8d6c657b6da31143104

  • SHA256

    39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa

  • SHA512

    46dd14c8cec28a2ff6ab968705c2b3bac2cb5a99249d7380c6c3b8afba7a10163916276546ed9420f9f189cf6ffd8f2b953f9a0255294f778e5e0e0a83164117

  • SSDEEP

    24576:n39WkOyHutimZ9VSly2hVvHW6qMnSbTBBhBMN:39qHPkVOBTK

Malware Config

Signatures

  • Detect PurpleFox Rootkit 1 IoCs

    Detect PurpleFox Rootkit.

  • Gh0st RAT payload 1 IoCs
  • Gh0strat

    Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

  • Gh0strat family
  • PurpleFox

    PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.

  • Purplefox family
  • Drops file in Drivers directory 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe
    "C:\Users\Admin\AppData\Local\Temp\39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\39644B~1.EXE > nul
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Windows\SysWOW64\PING.EXE
        ping -n 2 127.0.0.1
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:2820
  • C:\Windows\SysWOW64\Skcsk.exe
    C:\Windows\SysWOW64\Skcsk.exe -auto
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Windows\SysWOW64\Skcsk.exe
      C:\Windows\SysWOW64\Skcsk.exe -acsi
      2⤵
      • Drops file in Drivers directory
      • Sets service image path in registry
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: LoadsDriver
      • Suspicious use of AdjustPrivilegeToken
      PID:2756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\Skcsk.exe

    Filesize

    1.4MB

    MD5

    5b22d7770f0a13b132abe8225d3d0840

    SHA1

    95054ea7916a1c004972c8d6c657b6da31143104

    SHA256

    39644b49b99c9bc377b468c223000fd5446a71b679b285d2a88ea7d7ecea02fa

    SHA512

    46dd14c8cec28a2ff6ab968705c2b3bac2cb5a99249d7380c6c3b8afba7a10163916276546ed9420f9f189cf6ffd8f2b953f9a0255294f778e5e0e0a83164117

  • memory/2800-0-0x0000000000400000-0x0000000000580000-memory.dmp

    Filesize

    1.5MB

  • memory/2800-1-0x0000000010000000-0x000000001019F000-memory.dmp

    Filesize

    1.6MB