vjw0rm | c05fa4aabfad177a35fb044dfbe9354a91a7e06ccba7e9b1aa349a7b11f3c6ab

Analysis

max time kernel
141s
max time network
140s
platform
windows10_x64
resource
win10-en-20210920
submitted
13-10-2021 17:19

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General

Target

temp.js
Size

81KB
MD5

cef5ae43fcc340029300954a60931ca5
SHA1

f7f67f70c25c1a7d59ed79e896ef47b0efa83d86
SHA256

c05fa4aabfad177a35fb044dfbe9354a91a7e06ccba7e9b1aa349a7b11f3c6ab
SHA512

4e8a0fe5a850ec7db3cc1e30f609e02a7934eba6e0e2978d304d32573606a75565b0ab7bc7d3f3979b9eeb70ce380f9d1d1f17cb80564c2ed786efbe03ec8804

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://7700js.duckdns.org:7700

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

9 2372 wscript.exe

flow	pid	process
9	2372	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\temp.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\temp.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
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\FM24ZGX1AP = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\temp.js'"	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run	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

604 schtasks.exe

pid	process
604	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2372 wrote to memory of 604	2372	wscript.exe	schtasks.exe
PID 2372 wrote to memory of 604	2372	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\temp.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2372

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\temp.js
2⤵
- Creates scheduled task(s)
PID:604

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/604-115-0x0000000000000000-mapping.dmp

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