vjw0rm | e913fbfe0af0074695ba3d6d8306f5ab24699df20c0fd2309dc3c3aa80d3271c

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-en-20211104
submitted
06-12-2021 16:57

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General

Target

ZXRTBNUOO1.js
Size

9KB
MD5

46d001587dd33056afb6dd4f8ace0310
SHA1

6f7b364e422b91bfdc5321fcff95438223da153c
SHA256

e913fbfe0af0074695ba3d6d8306f5ab24699df20c0fd2309dc3c3aa80d3271c
SHA512

8ce90351d129bb7c999afd8f4ee48f6fed4e710921b9d2597206939b52d335cc97ffb13e859eca5b0721cacd1fce60b2e90392616ea64b43cb430451c318def3

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://marshjohn989.duckdns.org:7920

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 1908 wscript.exe

flow	pid	process
5	1908	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\ZXRTBNUOO1.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ZXRTBNUOO1.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-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Windows\CurrentVersion\Run\GBOMHGW4UC = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\ZXRTBNUOO1.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

1328 schtasks.exe

pid	process
1328	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1908 wrote to memory of 1328	1908	wscript.exe	schtasks.exe
PID 1908 wrote to memory of 1328	1908	wscript.exe	schtasks.exe
PID 1908 wrote to memory of 1328	1908	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\ZXRTBNUOO1.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1908

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\ZXRTBNUOO1.js
2⤵
- Creates scheduled task(s)
PID:1328

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/1328-55-0x0000000000000000-mapping.dmp

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