vjw0rm | a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-02-2024 22:02

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General

Target

a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.js
Size

23KB
MD5

e4eb55ac626bc25b72296d2dd2b1f3fb
SHA1

7576d84093c04f1fe086100dc577d542fc7960d5
SHA256

a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3
SHA512

f7f12bdeba8496182f06e26859b270d2d84b7435ef0bb5b2d867c272503f2c0755e4670044157cf3f542ae3bcaee534ec6a7b67c52f3d3f8d80ae830828eec8a
SSDEEP

384:0XKX5cvwCjelY209KkHFQsDOBC7oJJmGlsRzDPlfyDYbYR1733kyxr7hjC3hRv:06X5i6lY209KkHz6BC7oJJme+flfW/lG

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
3	1620	wscript.exe
30	1620	wscript.exe
38	1620	wscript.exe
47	1620	wscript.exe
55	1620	wscript.exe
60	1620	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-1-5-21-275798769-4264537674-1142822080-1000\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\EVyOkSchlF.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\EVyOkSchlF.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.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-1-5-21-275798769-4264537674-1142822080-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NCSH8GWAZB = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.js\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\EVyOkSchlF.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
1176	schtasks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 3936	1620	wscript.exe	86
PID 1620 wrote to memory of 3936	1620	wscript.exe	86
PID 1620 wrote to memory of 1176	1620	wscript.exe	88
PID 1620 wrote to memory of 1176	1620	wscript.exe	88

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\a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.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:1620
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\EVyOkSchlF.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:3936
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\a642b246cc03750cb7968703d5a17b8c3823599cfc78d9dcc7d6b8e613f98bb3.js
  2⤵
  - Creates scheduled task(s)
  PID:1176

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

C:\Users\Admin\AppData\Roaming\EVyOkSchlF.js

Filesize
7KB

MD5
1a2a06c9b9377f182094c437ccafd3de

SHA1
923c7f81f8266f0753d6a7bf9591e06be5c35a4e

SHA256
873d6b1b90d36b2bf0be2a34df85fba65c95267a0c07976ec5de4633bbdf4345

SHA512
fcf37c4da3e954631997810be27809742a2a88df792f8a54b82ab21ca2a2958b0c5feb2e3497bc70a27050cb9519192304573e0a48d97fd669a4e27943106f84

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads