vjw0rm | 7437f9bdb9a271fc9fa6f4b165675e08d53c00e62a61e634c4ee34ed01b73b0a

Analysis

max time kernel
141s
max time network
146s
platform
windows10_x64
resource
win10v20210410
submitted
21-06-2021 14:31

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

TBA1610955.js
Size

9KB
MD5

e3cb5fb484ec5e048872f59a9d48bcd3
SHA1

ecd7f55a9050d3af0110e857a2133507108c8609
SHA256

7437f9bdb9a271fc9fa6f4b165675e08d53c00e62a61e634c4ee34ed01b73b0a
SHA512

c13e9a7434afcb4436b560f3f58dc2cdf2934f688cd39c0065429dd680375b575fce55fcf31c70d08b345f64d56dc5d7955caa2e831bc8ad0b4c62547beb0523

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

6 740 wscript.exe

flow	pid	process
6	740	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\TBA1610955.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\TBA1610955.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
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\VK4NKWEXF7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\TBA1610955.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	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

2780 schtasks.exe

pid	process
2780	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 740 wrote to memory of 2780	740	wscript.exe	schtasks.exe
PID 740 wrote to memory of 2780	740	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\TBA1610955.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:740

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\TBA1610955.js
2⤵
- Creates scheduled task(s)
PID:2780

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

Loading Replay Monitor...

Downloads

memory/2780-114-0x0000000000000000-mapping.dmp

Download