Overview

overview

10

Static

static

10

Krampus cracked.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 01:22

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General

  • Target

    Krampus cracked.exe

  • Size

    76KB

  • MD5

    39a74d19195ac12e65a94be37b20380d

  • SHA1

    b3ea43c70a5260d9be7dd62654537bb9fc689778

  • SHA256

    21a18975cf755bf51f0aa15bfb3b4a49d41606ca8a14c365cadb331c971668ac

  • SHA512

    09c96f1f2f02868c3a44b18d35441d9a4ca86c022807fe281c32e068681e0356d8c60ee737ce329fb1781b6051dbf50c125047fdbaafa4bf71da0c168f14a8f5

  • SSDEEP

    1536:vq8m13fpRwyaRUwh+gJ0BvPHw+bvQwVUs/GOpOKvMFF8:vqf5BGRg5Q+bvQYGMOKEw

Score
10/10
xwormpersistencerattrojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:54211

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\Krampus cracked.exe
    "C:\Users\Admin\AppData\Local\Temp\Krampus cracked.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:4964
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3352
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2996
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:32

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log
    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

    Download Submit
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    Filesize

    76KB

    MD5

    39a74d19195ac12e65a94be37b20380d

    SHA1

    b3ea43c70a5260d9be7dd62654537bb9fc689778

    SHA256

    21a18975cf755bf51f0aa15bfb3b4a49d41606ca8a14c365cadb331c971668ac

    SHA512

    09c96f1f2f02868c3a44b18d35441d9a4ca86c022807fe281c32e068681e0356d8c60ee737ce329fb1781b6051dbf50c125047fdbaafa4bf71da0c168f14a8f5

    Download Submit
  • memory/3352-9-0x00007FFA33CB0000-0x00007FFA34771000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/3352-11-0x00007FFA33CB0000-0x00007FFA34771000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4664-0-0x0000000000250000-0x000000000026A000-memory.dmp
    Filesize

    104KB

    Download
  • memory/4664-1-0x00007FFA33CB0000-0x00007FFA34771000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4664-6-0x000000001B1B0000-0x000000001B1C0000-memory.dmp
    Filesize

    64KB

    Download
  • memory/4664-12-0x00007FFA33CB0000-0x00007FFA34771000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4664-13-0x000000001B1B0000-0x000000001B1C0000-memory.dmp
    Filesize

    64KB

    Download