vjw0rm | 99d7b67e0d011b22fe3e491445fe0a6dab5e6999d8f7fb99ec505d434255d712

Analysis

max time kernel
141s
max time network
170s
platform
windows7_x64
resource
win7v20210410
submitted
07-07-2021 09:02

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4.js
Size

9KB
MD5

b5e34472d72474569a2332ce317f4cc1
SHA1

209017707d1e40faa9ec527e2128ef25de4b76ce
SHA256

99d7b67e0d011b22fe3e491445fe0a6dab5e6999d8f7fb99ec505d434255d712
SHA512

2d18a8be9a19fa77336d950c18257039f4fe5165c354aae253efba0509c72a879a6ccbf3ec2275345deeed39d31227ae95ff7c56fa1583919e715ad6f5ba0094

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

5 2028 wscript.exe

flow	pid	process
5	2028	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\4.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4.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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\I0ZIRGD8RJ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\4.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

1696 schtasks.exe

pid	process
1696	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2028 wrote to memory of 1696	2028	wscript.exe	schtasks.exe
PID 2028 wrote to memory of 1696	2028	wscript.exe	schtasks.exe
PID 2028 wrote to memory of 1696	2028	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\4.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2028

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\4.js
2⤵
- Creates scheduled task(s)
PID:1696

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/1696-60-0x0000000000000000-mapping.dmp

Download