vjw0rm | 3d49eb4b682f1e8148a65416a63aa2b940bc09f0ecc7cfaaee2eb259edde120a

Analysis

max time kernel
129s
max time network
157s
platform
windows7_x64
resource
win7v20210408
submitted
16-07-2021 18:03

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General

Target

#Z90NSAJRA.js
Size

9KB
MD5

eeba1092f27fc5e0905f7cd8b08ff836
SHA1

ee24cfe1fac3fdc700114abf4d03b7070ceadeb0
SHA256

3d49eb4b682f1e8148a65416a63aa2b940bc09f0ecc7cfaaee2eb259edde120a
SHA512

a532c49e5dfa6b6626680eda846e13379863a1b7ca206468df916e49525f44fe7f0b420f60948c2efb23dfc0cc9e08fb03ce7655508b17f8d85a69a655fe7780

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 1036 wscript.exe

flow	pid	process
6	1036	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\#Z90NSAJRA.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#Z90NSAJRA.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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\ECJ55M0WKI = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#Z90NSAJRA.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

2040 schtasks.exe

pid	process
2040	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1036 wrote to memory of 2040	1036	wscript.exe	schtasks.exe
PID 1036 wrote to memory of 2040	1036	wscript.exe	schtasks.exe
PID 1036 wrote to memory of 2040	1036	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\#Z90NSAJRA.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#Z90NSAJRA.js
2⤵
- Creates scheduled task(s)
PID:2040

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/2040-59-0x0000000000000000-mapping.dmp

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