vjw0rm | 9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d

Analysis

max time kernel
51s
max time network
60s
platform
windows7_x64
resource
win7-en-20211208
submitted
27-01-2022 17:38

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General

Target

YSOKNUOW.js
Size

13KB
MD5

bda43336bf6249a4e667d207d62cc910
SHA1

9dc42b7d9dfd2b3f5a22e71abb0106fdc736bf4a
SHA256

9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d
SHA512

af80aa64ca5d29d5f1839b38330a158507faac2ec305242d94d4c041da65c8b8a8ed8c927e1cd6e1383f1fe1335a814c6d28b1bbc366e3de3d9898478edd1650

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://jdfodl45.duckdns.org:9032

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 1888 wscript.exe

flow	pid	process
5	1888	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\YSOKNUOW.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\YSOKNUOW.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-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\ABR5SI7DKX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\YSOKNUOW.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\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

828 schtasks.exe

pid	process
828	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1888 wrote to memory of 828	1888	wscript.exe	schtasks.exe
PID 1888 wrote to memory of 828	1888	wscript.exe	schtasks.exe
PID 1888 wrote to memory of 828	1888	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\YSOKNUOW.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1888

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\YSOKNUOW.js
2⤵
- Creates scheduled task(s)
PID:828

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/1888-60-0x000007FEFC511000-0x000007FEFC513000-memory.dmp

Filesize
8KB

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