vjw0rm | b81b577fa7c0e7ccfd46c6a8171e83ad9c2c4a1e4c852b8b8d2ace4b0062313d

Analysis

max time kernel
125s
max time network
133s
platform
windows7_x64
resource
win7v20210408
submitted
07-10-2021 14:22

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General

Target

T00170MNA.js
Size

12KB
MD5

f4240a60fd1b7c4c476330a3028b3bb2
SHA1

f9a8d6a45341071168590f704bdc678c81f32d2c
SHA256

b81b577fa7c0e7ccfd46c6a8171e83ad9c2c4a1e4c852b8b8d2ace4b0062313d
SHA512

5dd08a33b9fa889cb7118eeccb6c374909fe3ed8582203b4c6bc6850fe39d0db70547a5187f2d2c7e50ff5959cbba2dabb5d3afb7db573a2bf9a365d060d5b29

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 2004 wscript.exe

flow	pid	process
6	2004	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\T00170MNA.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\T00170MNA.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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\GDC36KIXYU = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\T00170MNA.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

1720 schtasks.exe

pid	process
1720	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2004 wrote to memory of 1720	2004	wscript.exe	schtasks.exe
PID 2004 wrote to memory of 1720	2004	wscript.exe	schtasks.exe
PID 2004 wrote to memory of 1720	2004	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\T00170MNA.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\T00170MNA.js
2⤵
- Creates scheduled task(s)
PID:1720

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

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Downloads

memory/1720-60-0x0000000000000000-mapping.dmp

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