vjw0rm | e051971136e18efd26174bd5641abfd2c687865c6790c9a9ea1582288b8f956b

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-en-20211208
submitted
17-12-2021 08:53

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General

Target

UW802KASIOPSDUW.js
Size

54KB
MD5

299e8af9cce953ee2750818f7cea2563
SHA1

a00478a0927d2b61d1693b6002e6c1a88abe8252
SHA256

e051971136e18efd26174bd5641abfd2c687865c6790c9a9ea1582288b8f956b
SHA512

226d841bcb3d598f961dbeaa19d57290fabcadf679210ed7ade3e8e5d805664e22c2ce16c9d252d67e8a5cc05c7b1f494c121c555f0c0ab5a6c4da8d3c315340

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://decebermoney.duckdns.org:8020

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 1448 wscript.exe

flow	pid	process
5	1448	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\UW802KASIOPSDUW.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\UW802KASIOPSDUW.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-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\E80VDBUI3I = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\UW802KASIOPSDUW.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

1624 schtasks.exe

pid	process
1624	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1448 wrote to memory of 1624	1448	wscript.exe	schtasks.exe
PID 1448 wrote to memory of 1624	1448	wscript.exe	schtasks.exe
PID 1448 wrote to memory of 1624	1448	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\UW802KASIOPSDUW.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1448

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\UW802KASIOPSDUW.js
2⤵
- Creates scheduled task(s)
PID:1624

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/1624-55-0x0000000000000000-mapping.dmp

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