vjw0rm | a7aea824310617598f8685bdb14a01fd962d3cb7a80227f434025540f6f43a2d

Analysis

max time kernel
119s
max time network
118s
platform
windows7_x64
resource
win7v20210408
submitted
29-04-2021 19:05

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General

Target

Invoice B2023B.js
Size

3KB
MD5

0d155eb2cdaf42d5f145343cb3dd09ad
SHA1

d9499f3e148c1426961adcccb42f2f1c89d9c6fb
SHA256

a7aea824310617598f8685bdb14a01fd962d3cb7a80227f434025540f6f43a2d
SHA512

76881dc768bba5bae6edfea142986b48022e4c67e03fc8ab9cc1599fe81b2d14b429682990ff7c9885a6e797c01c6d8f91f86220e2361f992375fd4552eaba87

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

6 736 wscript.exe

flow	pid	process
6	736	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\Invoice B2023B.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice B2023B.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\CWI41JI7HU = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Invoice B2023B.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

600 schtasks.exe

pid	process
600	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 736 wrote to memory of 600	736	wscript.exe	schtasks.exe
PID 736 wrote to memory of 600	736	wscript.exe	schtasks.exe
PID 736 wrote to memory of 600	736	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Invoice B2023B.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:736

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Invoice B2023B.js
2⤵
- Creates scheduled task(s)
PID:600

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/600-60-0x0000000000000000-mapping.dmp

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