vjw0rm | 2a1be7d69e5ac0c8e53caf808c1de217c90f2351af6310aa7134f5fa5284db96

Analysis

max time kernel
121s
max time network
146s
platform
windows7_x64
resource
win7-en-20210920
submitted
08-10-2021 10:23

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General

Target

D61N28A9X6.js
Size

81KB
MD5

9fb6723be237a72c8e0cb6622db940b7
SHA1

497d9d5e827ef3e28e5786faf011cff5592d5545
SHA256

2a1be7d69e5ac0c8e53caf808c1de217c90f2351af6310aa7134f5fa5284db96
SHA512

7d7de7b01157e7d4e1a8cd52605e381fb802e32f2cff00514067c9cfbe28d471b857fbf0fc429e2a0a45b2199482d582640e4538e527bb2afeb1eb753c4929cc

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://myjs5690.duckdns.org:5690

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

5 1172 wscript.exe

flow	pid	process
5	1172	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\D61N28A9X6.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\D61N28A9X6.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\4YC5ICXZVV = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\D61N28A9X6.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

528 schtasks.exe

pid	process
528	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1172 wrote to memory of 528	1172	wscript.exe	schtasks.exe
PID 1172 wrote to memory of 528	1172	wscript.exe	schtasks.exe
PID 1172 wrote to memory of 528	1172	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\D61N28A9X6.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1172

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\D61N28A9X6.js
2⤵
- Creates scheduled task(s)
PID:528

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/528-54-0x0000000000000000-mapping.dmp

Download
memory/1172-53-0x000007FEFBE61000-0x000007FEFBE63000-memory.dmp

Filesize
8KB

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