vjw0rm | a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09

Analysis

max time kernel
149s
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, 21:53

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General

Target
a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.js
Size 82KB
Sample240226-1r5evshe61
SHA256 a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09
MD5 7929c97ce63fe3cdacfc7352dc166de4
SHA1 01ba4443631259f15e9b699a1bb5da740ac2db5b
SHA512 8785c0a0b54965d7e1d8f7936c9d7c0be72a1947f83821620b76428917cdbf0895d1de508262eb0f97743b82c5d989da45573faeffd0be207c854f27de18733e
SSDEEP 1536:Ys0U6gprfN7+KvoGAoQ2CdLzbYaaPFIs8Ja1cu:YI6Art+z3LkaA1
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
11	4564	wscript.exe
29	4564	wscript.exe
34	4564	wscript.exe
43	4564	wscript.exe
51	4564	wscript.exe
56	4564	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\a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XxWHiUfsIt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XxWHiUfsIt.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\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\XxWHiUfsIt.js\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\QMKYOV5VW3 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.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
4496	schtasks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 3396	4564	wscript.exe	87
PID 4564 wrote to memory of 3396	4564	wscript.exe	87
PID 4564 wrote to memory of 4496	4564	wscript.exe	89
PID 4564 wrote to memory of 4496	4564	wscript.exe	89

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\a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.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:4564
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\XxWHiUfsIt.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:3396
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\a4668c29be9951320ab96983772a7ca6819e9c511502243ac8543b1879d6ed09.js
  2⤵
  - Creates scheduled task(s)
  PID:4496

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

XxWHiUfsIt.js

Path C:\Users\Admin\AppData\Roaming\XxWHiUfsIt.js
Size 29KB
SHA256 c0d33f59aec9f2ed5a83b75f7f54e370ce8ba97e9575bd45d3cfe32631ecab18
MD5 f62b59edbb6e670d81c15130a915e2b1
SHA1 d4c4e5970208baaef7b5def3c6a498bdf22a0020
SHA512 5ca9ead9f4c5b6404d09fe9185fd53e50e3c03ce4a62229cef851c605005aef8d83b48bf8403c26f6d7bb71fec2c7b387e341c70d8d4243b6bf6d532e3ed2baa
SSDEEP 384:3t+y5mNsiXgzCDkWsK/JyVqf3y9ouRahJDotzXq5h5wu:9+ygN3hDkIZ3cdajohq5gu
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