vjw0rm | ec638aada9c69c74a1a0e31144c36d9a759f045c6ce90eb8b09a5f7644fb4957

Analysis

max time kernel
110s
max time network
122s
platform
windows10_x64
resource
win10-en-20211208
submitted
20-12-2021 17:57

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General

Target

GKOPEWRYU.js
Size

61KB
MD5

6c65767545d7ad14fa6f2aa28fdd37e1
SHA1

7a31fc2c58c387e538b8d2c6e288cfacee899ea2
SHA256

4659be2ae1f69a483f84a858f35ab0b184031a1dbdccfb8b89decaa75004f249
SHA512

73161f26b1cbd297c89a7b9811837b3bae6a44bf022aadd94ec1c57daddc2092c43809b002e4aab2cd59ecd2cb8ad106ede24d459be2831bf38537c6b8396ea8

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

9 2504 wscript.exe

flow	pid	process
9	2504	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\GKOPEWRYU.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\GKOPEWRYU.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-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000\Software\Microsoft\Windows\CurrentVersion\Run\3W88SBC8T0 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\GKOPEWRYU.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

3844 schtasks.exe

pid	process
3844	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2504 wrote to memory of 3844	2504	wscript.exe	schtasks.exe
PID 2504 wrote to memory of 3844	2504	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\GKOPEWRYU.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2504

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\GKOPEWRYU.js
2⤵
- Creates scheduled task(s)
PID:3844

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/3844-118-0x0000000000000000-mapping.dmp

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