vjw0rm | fe44c2a762aa0a7e11cfefcba962382178285832996677ae6f8e88ccd5243f16

Analysis

max time kernel
294s
max time network
301s
platform
windows10_x64
resource
win10v20210408
submitted
15-06-2021 13:15

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General

Target

1ZNMAOPMAS.js
Size

9KB
MD5

96a3d54e8c6a3c65d35916b3779f821b
SHA1

98b3281204373801bc655363ac9900d0d3fa3a86
SHA256

fe44c2a762aa0a7e11cfefcba962382178285832996677ae6f8e88ccd5243f16
SHA512

8a116c6f34872b7f63fa238186afc0593df71e0109b5052fee9dd727d3f61fe0b83db81688d1f0a6078589e4ad75da1d7ff76070cf9c45db0b3bfa6ed62cf5ca

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

8 624 wscript.exe

flow	pid	process
8	624	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\1ZNMAOPMAS.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ZNMAOPMAS.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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\VQFSTDUJ0B = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\1ZNMAOPMAS.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

3596 schtasks.exe

pid	process
3596	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 624 wrote to memory of 3596	624	wscript.exe	schtasks.exe
PID 624 wrote to memory of 3596	624	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\1ZNMAOPMAS.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:624

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\1ZNMAOPMAS.js
2⤵
- Creates scheduled task(s)
PID:3596

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/3596-114-0x0000000000000000-mapping.dmp

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