vjw0rm | 47fd8e31ecf0c8243056163d6e17962156875c680d534756f4155e478526d2bb

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 02:04

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General

Target
23d1f183e50e7ea2393fa5eded265813.js
Size 32KB
Sample231231-chkr4abfck
SHA256 47fd8e31ecf0c8243056163d6e17962156875c680d534756f4155e478526d2bb
MD5 23d1f183e50e7ea2393fa5eded265813
SHA1 a85f64b11fe641fd18bb4b79f2779b11dd4c0869
SHA512 740fd98898e225fe70f107c21eab6867436054e152e58828be39f0de022fc670150add5b6034a3bae3b91af91dacbfb230d47732c4b4fb7bfefee8a0175fef43
SSDEEP 768:Ic41Uru47JvsonG/SOWrey516BGpJiuoEY03l83:4UFUoTezMpJiqU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 6 IoCs

flow	pid	Process
4	2576	wscript.exe
37	2576	wscript.exe
60	2576	wscript.exe
77	2576	wscript.exe
93	2576	wscript.exe
98	2576	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MuCMRJfbWc.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MuCMRJfbWc.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\MuCMRJfbWc.js\""	wscript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 4412	4536	wscript.exe	19
PID 4536 wrote to memory of 4412	4536	wscript.exe	19
PID 4536 wrote to memory of 2576	4536	wscript.exe	18
PID 4536 wrote to memory of 2576	4536	wscript.exe	18

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\23d1f183e50e7ea2393fa5eded265813.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Local\Temp\VLK.vbs"
  2⤵
  - Blocklisted process makes network request
  PID:2576
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\MuCMRJfbWc.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:4412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

VLK.vbs

Path C:\Users\Admin\AppData\Local\Temp\VLK.vbs
Size 2KB
SHA256 2f47caad055b12872d1501f273fe4b86bb641a1f9c1f257dcb0c12f70c1870a9
MD5 6dfc3b5e6d03b18f354fca422f625c72
SHA1 b62e9bd385f2ab06fc0fa0bcf48ef41b6cd5bc1d
SHA512 65dc64def37722cadd37bd0020d18b30697fe36a5a402f775d4bf3975066064264189cb39d09d25d57cfe86ef33b1ce1b16aa8ae8c780bb4e6e80fd794fa0ba9
MD5 SHA1 SHA512

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MuCMRJfbWc.js

Path C:\Users\Admin\AppData\Roaming\MuCMRJfbWc.js
Size 10KB
SHA256 5b5fe15c592a94116c3aca25c92c8e17b16245898bb3557a620449a16091a2d9
MD5 ef6faacbf40e1fe1de245177065a4f68
SHA1 d3d4baa744b10d39ddb7b4e048e18149d689e47c
SHA512 dbd55abb487f5860ea4d8517092acd80c508aa69b9a6f6876465d80d5cb8dfdaed02619f6459c23a43781da6d23efc3998a1f9b4c11e2ddbe5b4b1e36a5af9ab
SSDEEP 192:boRQTOi+1Ark2+kBSYNLWI+YWhGd7ovRLcJzdnyii903l1GqTQ3:O1ibsKWNGdMZEY03l83
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads