vjw0rm | ef941e9a12dd57020e8c110e4978fb953b3d41f482f650184980318676fd0408

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 08:27

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General

Target
136475f8c1a1c7f23d87ea255926df15.js
Size 19KB
Sample231230-kchpjsafgp
SHA256 ef941e9a12dd57020e8c110e4978fb953b3d41f482f650184980318676fd0408
MD5 136475f8c1a1c7f23d87ea255926df15
SHA1 a2f0c5d389116df32e96c5e03210c370ea04da09
SHA512 577ea90c902e95dd8ce1bf8227fad2439023d52733c57ccf3d1fe20e21c19b14529f1e23e75ef756b28c0c83d03c1a0a0e09ab5d04208a019647c15a2f5b070e
SSDEEP 384:tKeUYgnd2MQ4uR/1/G/uDOshOKD74FFspa1nd+kVJ7SvQk1wT66ftab:/gBQ4ugYOA7YFs0sQkGTzFab
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 10 IoCs

flow	pid	Process
8	3056	wscript.exe
38	3056	wscript.exe
68	3056	wscript.exe
76	3056	wscript.exe
86	3056	wscript.exe
103	3056	wscript.exe
169	3056	wscript.exe
151	3056	wscript.exe
199	3056	wscript.exe
229	3056	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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HDOoLbqFXE.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HDOoLbqFXE.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\136475f8c1a1c7f23d87ea255926df15.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\136475f8c1a1c7f23d87ea255926df15.js	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\B02N3ZE1UL = "\"C:\\Users\\Admin\\AppData\\Roaming\\HDOoLbqFXE.js\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4UXUFTLXXY = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\136475f8c1a1c7f23d87ea255926df15.js\""	wscript.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
928	schtasks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 1108	3056	wscript.exe	22
PID 3056 wrote to memory of 1108	3056	wscript.exe	22
PID 3056 wrote to memory of 928	3056	wscript.exe	21
PID 3056 wrote to memory of 928	3056	wscript.exe	21

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

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\136475f8c1a1c7f23d87ea255926df15.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\136475f8c1a1c7f23d87ea255926df15.js
  2⤵
  - Creates scheduled task(s)
  PID:928
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\HDOoLbqFXE.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:1108

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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

HDOoLbqFXE.js

Path C:\Users\Admin\AppData\Roaming\HDOoLbqFXE.js
Size 5KB
SHA256 8f8adf65125e8492b2af0ad5953214880aabb6f8718a9bed0d3723507c360701
MD5 ceeeec8799d66c2d6b0b63cf3fb7d639
SHA1 46126751e39598977890ddd9bfdff6249003e03e
SHA512 fde12c110bbac932aad37e859ce43e2299def8555fe85e42155d34198fccf8038b459217b183ea223dadc6db7e715a14a7a743b7e85e6ae22844dc1a86f117e1
SSDEEP 96:dmLhc34QrmJ5SHr46WSVdXuSVdVI3R2erS927BklxqsYj6x5zhs:t3laAxv+SvPcklxqsrx5z+
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