vjw0rm | 6566e970bb140ac6ecdc59a11319c7a0650dbae2c182157e7f51b9bb8502c34e

Analysis

max time kernel
136s
max time network
167s
platform
windows7_x64
resource
win7-en-20210920
submitted
14-10-2021 15:13

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General

Target

G62J15CB97C53V.js
Size

81KB
MD5

c5b048b21730de23dabcc6758914a2f7
SHA1

e9d5f9bee531aff20d8c8f64b70e51861b9f6b81
SHA256

6566e970bb140ac6ecdc59a11319c7a0650dbae2c182157e7f51b9bb8502c34e
SHA512

a83d03ce24643e91f40ecaeddefbc55fa2720df6e75f7422e8470caf8e3199b8d8c7783e0665a6d176ea44e1d4f7b6d415e903d7bc25fd2cab3ae4e347005975

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://6800js.duckdns.org:6800

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

5 1576 wscript.exe

flow	pid	process
5	1576	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\G62J15CB97C53V.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\G62J15CB97C53V.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\BYK43BSFUJ = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\G62J15CB97C53V.js'"	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\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

572 schtasks.exe

pid	process
572	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1576 wrote to memory of 572	1576	wscript.exe	schtasks.exe
PID 1576 wrote to memory of 572	1576	wscript.exe	schtasks.exe
PID 1576 wrote to memory of 572	1576	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\G62J15CB97C53V.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1576

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\G62J15CB97C53V.js
2⤵
- Creates scheduled task(s)
PID:572

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

Replay Monitor

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Downloads

memory/572-54-0x0000000000000000-mapping.dmp

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memory/1576-53-0x000007FEFBA11000-0x000007FEFBA13000-memory.dmp

Filesize
8KB

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