vjw0rm | a19b1877311f17eccd1e4b688477da37edfbbfa769ff267c8563042a46eb7bec

Analysis

max time kernel
142s
max time network
147s
platform
windows7_x64
resource
win7v20210410
submitted
09-07-2021 17:46

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General

Target

XBWN6KUOL.js
Size

9KB
MD5

801fad12d820f4eec7ba68ac6690dbe7
SHA1

ba2b3430532fbc4d14c6f221caf422b8841e2a23
SHA256

a19b1877311f17eccd1e4b688477da37edfbbfa769ff267c8563042a46eb7bec
SHA512

36ad06b284f08957e5d9ee80f68e1c2d8922e4c813efe6d5cee2e6f0db3055ae173b53894d6820767e8ec5a3274073e5bc9f7c4b9942502db0b1190bedefb2cb

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 1040 wscript.exe

flow	pid	process
6	1040	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\XBWN6KUOL.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XBWN6KUOL.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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECJ55M0WKI = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\XBWN6KUOL.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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

1632 schtasks.exe

pid	process
1632	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1040 wrote to memory of 1632	1040	wscript.exe	schtasks.exe
PID 1040 wrote to memory of 1632	1040	wscript.exe	schtasks.exe
PID 1040 wrote to memory of 1632	1040	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\XBWN6KUOL.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1040

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\XBWN6KUOL.js
2⤵
- Creates scheduled task(s)
PID:1632

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/1632-60-0x0000000000000000-mapping.dmp

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