vjw0rm | a858b2b8b4be7cb23e0a7d37a0c08489a6820cb1be5523a7a466014eb994391f

Analysis

max time kernel
151s
max time network
162s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
31-03-2023 16:01

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General

Target

$RECYCLE.BIN/$R5K4GOK.js
Size

9.0MB
MD5

2fe9e3828a214aedecdfe07148b67070
SHA1

8a6653fc596bb68fdfcb50516dfb61d745bd5dbf
SHA256

a7ea02884d2af760f1bb1e0c7f7b65cfa40825ed236d7ba2a93a57c0369ba4c2
SHA512

fa3b3b2b8e17d131f4175d6d0eae1f4006eb7f34c0e70e8b93c93e80802da93f8e15fb36e6914a53403202be8eaacf241a05834f29b6b2c9c76f42840378e052
SSDEEP

96:7ZH1uy5XIWBof2lcJc9FJtSPBkk+l4Py5zfI2X2D2xRO1IXyYRZGzO00d4Qn19dz:7ZVhSWx1rSOX2D2rzpRZYO00x9nVLxK

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://veegod.duckdns.org:7777

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 1416 wscript.exe
Drops startup file 1 IoCs

Processes:

wscript.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$R5K4GOK.js wscript.exe

flow	pid	process
4	1416	wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$R5K4GOK.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-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\7B2IZ0X81I = "\"C:\\Users\\Admin\\AppData\\Roaming\\$R5K4GOK.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

1924 schtasks.exe

pid	process
1924	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1416 wrote to memory of 1924	1416	wscript.exe	schtasks.exe
PID 1416 wrote to memory of 1924	1416	wscript.exe	schtasks.exe
PID 1416 wrote to memory of 1924	1416	wscript.exe	schtasks.exe

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\$RECYCLE.BIN\$R5K4GOK.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1416

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\$R5K4GOK.js
2⤵
- Creates scheduled task(s)
PID:1924

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

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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