Overview

overview

10

Static

static

10

JavaScript.exe

windows10-1703-x64

10

JavaScript.exe

windows10-2004-x64

10

JavaScript.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    23-05-2024 15:39

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General

  • Target

    JavaScript.exe

  • Size

    45KB

  • MD5

    f820ce3ab4a45a4e512a03eb04e5a4f8

  • SHA1

    ad8cebc70092daf23cabfc764c32d2556b02567c

  • SHA256

    48197dddf561852493a4a9c06b9e8a84015a16cd5dc131cccf7a528124790d95

  • SHA512

    14f4855a4ac220ab11fd14ead8baa19e812edada9ddc288161a159b5868855dee7de75e0288b76889eb5c0f0031c1b04f165ead393847cf1ae22d41747b1100f

  • SSDEEP

    768:gcNFC/wJSlFE1d15PhntpqOTDMFHFEPG9PMDOChSzYiXb1:gzwJS3yVQJF19PMDOC45Xb1

Score
10/10
xwormpersistencerattrojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

78.34.61.197:4782

Mutex

yRVcxFHrInqhyusF

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    Runtime Broker.exe

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Looks up external IP address via web service 1 IoCs

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

  • 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\JavaScript.exe
    "C:\Users\Admin\AppData\Local\Temp\JavaScript.exe"
    1⤵
    • 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:4852
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\ProgramData\Runtime Broker.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2752
  • C:\ProgramData\Runtime Broker.exe
    "C:\ProgramData\Runtime Broker.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4748
  • C:\ProgramData\Runtime Broker.exe
    "C:\ProgramData\Runtime Broker.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1444

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

System Information Discovery

1
T1082

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\ProgramData\Runtime Broker.exe
    Filesize

    45KB

    MD5

    f820ce3ab4a45a4e512a03eb04e5a4f8

    SHA1

    ad8cebc70092daf23cabfc764c32d2556b02567c

    SHA256

    48197dddf561852493a4a9c06b9e8a84015a16cd5dc131cccf7a528124790d95

    SHA512

    14f4855a4ac220ab11fd14ead8baa19e812edada9ddc288161a159b5868855dee7de75e0288b76889eb5c0f0031c1b04f165ead393847cf1ae22d41747b1100f

    Download Submit
  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Runtime Broker.exe.log
    Filesize

    654B

    MD5

    2cbbb74b7da1f720b48ed31085cbd5b8

    SHA1

    79caa9a3ea8abe1b9c4326c3633da64a5f724964

    SHA256

    e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

    SHA512

    ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

    Download Submit
  • memory/4748-11-0x00007FFDA2570000-0x00007FFDA3032000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4748-13-0x00007FFDA2570000-0x00007FFDA3032000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4852-0-0x00007FFDA2573000-0x00007FFDA2575000-memory.dmp
    Filesize

    8KB

    Download
  • memory/4852-1-0x00000000009C0000-0x00000000009D2000-memory.dmp
    Filesize

    72KB

    Download
  • memory/4852-2-0x00007FFDA2570000-0x00007FFDA3032000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4852-7-0x00007FFDA2570000-0x00007FFDA3032000-memory.dmp
    Filesize

    10.8MB

    Download