vjw0rm | 7eeb160cbe8bb7a5bbbf49c35c1b8ce4a10fdf518a4a28c494fdcf033841cbc1

Analysis

max time kernel
145s
max time network
147s
platform
windows10_x64
resource
win10v20210410
submitted
16-07-2021 17:33

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General

Target

1ZXONMSABNA.js
Size

9KB
MD5

ef86be6b2cc4b30e2759e38482d86008
SHA1

d242dbd08203cdd94b7501fd3f62c92102b517ac
SHA256

7eeb160cbe8bb7a5bbbf49c35c1b8ce4a10fdf518a4a28c494fdcf033841cbc1
SHA512

b0ac5813f5345bbd44e042fed252ab5ef3d0bf2f5bb3c52469a978f771ef4c721237c43d3971bad15fc97a904405aacacc43ade1bc136a5dc3d244334b36e2ad

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

6 3904 wscript.exe

flow	pid	process
6	3904	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ZXONMSABNA.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ZXONMSABNA.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-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECJ55M0WKI = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\1ZXONMSABNA.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

2648 schtasks.exe

pid	process
2648	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 3904 wrote to memory of 2648	3904	wscript.exe	schtasks.exe
PID 3904 wrote to memory of 2648	3904	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\1ZXONMSABNA.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3904

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\1ZXONMSABNA.js
2⤵
- Creates scheduled task(s)
PID:2648

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/2648-114-0x0000000000000000-mapping.dmp

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