vjw0rm | ecb06a64c672927554eeb66d6b0552a147e35eb85a30dadf28d4a2f92d8cb45d

Analysis

max time kernel
149s
max time network
151s
platform
windows10_x64
resource
win10v20210410
submitted
27-08-2021 16:31

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General

Target

#W0091.js
Size

12KB
MD5

d9cf0592d6515534cb8efa5b63cfae5b
SHA1

93764956ad2a38d3f70dde3ac0410b367bb8a92b
SHA256

ecb06a64c672927554eeb66d6b0552a147e35eb85a30dadf28d4a2f92d8cb45d
SHA512

e739a973e401bd3f96721a18fa1dbb5827e63365c4dacc46c7017adc0f6c93cc82b1c0d9fa71726b8e77b6fe1bdad4863d7ba2b4b71741fd001ce912557673f3

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

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

6 3156 wscript.exe

flow	pid	process
6	3156	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\#W0091.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#W0091.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-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\VXBM5F7PI1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#W0091.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

1708 schtasks.exe

pid	process
1708	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 3156 wrote to memory of 1708	3156	wscript.exe	schtasks.exe
PID 3156 wrote to memory of 1708	3156	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\#W0091.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3156

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#W0091.js
2⤵
- Creates scheduled task(s)
PID:1708

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/1708-114-0x0000000000000000-mapping.dmp

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