vjw0rm | 2b72f018808ce809de7cc73ba997d14b3c9acbe3ce6d13826d3b98c8eabe2cdd

Analysis

max time kernel
139s
max time network
184s
platform
windows7_x64
resource
win7v20210408
submitted
24-08-2021 15:41

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General

Target

#W001.js
Size

9KB
MD5

a89fe76f3a4a948ed06f3025f4f0a1d8
SHA1

f747e3602aad40383aad9b3623033d6af082d380
SHA256

2b72f018808ce809de7cc73ba997d14b3c9acbe3ce6d13826d3b98c8eabe2cdd
SHA512

1778dd3b1fb3d7ff6ce39c2b133f4bde7c56447f7bfbd5e2562a37b4811cf59979f83ed1644a9c1e9ff4b58894d3e29a8b08b0d349c7218d3864bdf22457234e

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 1724 wscript.exe

flow	pid	process
6	1724	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\#W001.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#W001.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\VXBM5F7PI1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#W001.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

868 schtasks.exe

pid	process
868	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1724 wrote to memory of 868	1724	wscript.exe	schtasks.exe
PID 1724 wrote to memory of 868	1724	wscript.exe	schtasks.exe
PID 1724 wrote to memory of 868	1724	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\#W001.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1724

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#W001.js
2⤵
- Creates scheduled task(s)
PID:868

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/868-60-0x0000000000000000-mapping.dmp

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