vjw0rm | fbc8ed5862b8ac3766b10502bc1afef13e84fbf2b07454c8988aa2140fa5ee9c

Analysis

max time kernel
139s
max time network
142s
platform
windows10_x64
resource
win10-en-20211208
submitted
16-12-2021 08:20

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General

Target

IMAGE.js
Size

3KB
MD5

4828f0de0d5a6dfe853ed9bc18437863
SHA1

c97fa294329a27d8e096f572e69b1319f644c967
SHA256

fbc8ed5862b8ac3766b10502bc1afef13e84fbf2b07454c8988aa2140fa5ee9c
SHA512

b1c58dc31b191e91d7371397e17500e704c2dbf33e5d413c31e6cd7035b3219165395cf872ef7846456efd67b88737e7fcfa944fbf94c4a956d00aff7ac97be0

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://2ndversionjs.duckdns.org:9100

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Blocklisted process makes network request 1 IoCs

Processes:

wscript.exe

flow pid process

10 3100 wscript.exe

flow	pid	process
10	3100	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\FZ7XTLKJQ0 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\IMAGE.js\""	wscript.exe

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

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
T1053

Processes:

schtasks.exe

pid process

1364 schtasks.exe

pid	process
1364	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 3100 wrote to memory of 1364	3100	wscript.exe	schtasks.exe
PID 3100 wrote to memory of 1364	3100	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\IMAGE.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3100

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\IMAGE.js
2⤵
- Creates scheduled task(s)
PID:1364

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1364-115-0x0000000000000000-mapping.dmp

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