vjw0rm | 121bab9bea6af0c05ebc9169a51c8a80cc2746222a6fa23b011aa1786f7945ef

Analysis

max time kernel
120s
max time network
151s
platform
windows10_x64
resource
win10v20210408
submitted
02-07-2021 23:02

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General

Target

Receipt.js
Size

3KB
MD5

ef849493ac1e9a1f1487587e41116213
SHA1

99e54e130df13f72230d76209977cc744b24000e
SHA256

121bab9bea6af0c05ebc9169a51c8a80cc2746222a6fa23b011aa1786f7945ef
SHA512

e0de22c26f9585705c733f1360d7500f6327705131a291d27dd27fde78344760278183685d4cbf0a7fefd64c2a98de6cb23ef74e03e937ae74c6035be32b0713

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

7 396 wscript.exe

flow	pid	process
7	396	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\Receipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Receipt.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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\MOLN4VNJHM = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Receipt.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

4060 schtasks.exe

pid	process
4060	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 396 wrote to memory of 4060	396	wscript.exe	schtasks.exe
PID 396 wrote to memory of 4060	396	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Receipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:396

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Receipt.js
2⤵
- Creates scheduled task(s)
PID:4060

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/4060-114-0x0000000000000000-mapping.dmp

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