vjw0rm | 1d31f4d9800687307188f1527d2c512249b972426e8ed4be143467ff2d9183f3

Analysis

max time kernel
128s
max time network
131s
platform
windows10_x64
resource
win10-en-20210920
submitted
26-10-2021 16:48

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General

Target

b2m1_Payment_receipt.js
Size

81KB
MD5

983be3951a672b11ebdfd6d7d1233299
SHA1

bb0e6da5abae02fcbefa6f1a619c6f3b1a3bf5a8
SHA256

1d31f4d9800687307188f1527d2c512249b972426e8ed4be143467ff2d9183f3
SHA512

67fdb9bc954ec67f83e0febdc2510665b8249af6ae00781ae02fca5b51b34a55fb4fd8c878969a49182a3cc29dc1f7d8328d56f8ab90df655222e9f4a8ed703c

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://6200js.duckdns.org:6200

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

9 2888 wscript.exe

flow	pid	process
9	2888	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\b2m1_Payment_receipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b2m1_Payment_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
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\BB4HJP0E1C = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\b2m1_Payment_receipt.js'"	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\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

376 schtasks.exe

pid	process
376	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2888 wrote to memory of 376	2888	wscript.exe	schtasks.exe
PID 2888 wrote to memory of 376	2888	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\b2m1_Payment_receipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2888

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\b2m1_Payment_receipt.js
2⤵
- Creates scheduled task(s)
PID:376

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/376-115-0x0000000000000000-mapping.dmp

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