vjw0rm | 4af88399a03ea0efe67abdd65989faacb978f8aac7e42a56e22e0d0d546be937

Analysis

max time kernel
134s
max time network
148s
platform
windows7_x64
resource
win7-20220414-en
submitted
09-07-2022 08:36

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General

Target

Voicemail-Audio092MP3.JS.js
Size

11KB
MD5

b50f717518a0939ac7e44a7dd6afc4e8
SHA1

ce751d94536e4407b83adf761e782a071bfdef83
SHA256

4af88399a03ea0efe67abdd65989faacb978f8aac7e42a56e22e0d0d546be937
SHA512

059bf5caeb19a111edb50ee421ad1d573d366badb1970c4cca8f665309c98ee74398cd5d7810b1d01fd4b0c837510d8c405c1cf4fc1a8706915380837a1f3319

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://hwprocessing.duckdns.org:9933

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

4 1052 wscript.exe

flow	pid	process
4	1052	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\Voicemail-Audio092MP3.JS.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Voicemail-Audio092MP3.JS.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-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\8Z0TNMFXTR = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Voicemail-Audio092MP3.JS.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

2012 schtasks.exe

pid	process
2012	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1052 wrote to memory of 2012	1052	wscript.exe	schtasks.exe
PID 1052 wrote to memory of 2012	1052	wscript.exe	schtasks.exe
PID 1052 wrote to memory of 2012	1052	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Voicemail-Audio092MP3.JS.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1052

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Voicemail-Audio092MP3.JS.js
2⤵
- Creates scheduled task(s)
PID:2012

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/1052-54-0x000007FEFC5C1000-0x000007FEFC5C3000-memory.dmp

Filesize
8KB

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memory/2012-55-0x0000000000000000-mapping.dmp

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