vjw0rm | b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e

Analysis

max time kernel
136s
max time network
150s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
21-02-2023 20:36

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General

Target

malware.js
Size

8KB
MD5

6133488aa55c35b2b8f8f5e987f2ce27
SHA1

a288f7774abdd0c1f337fe25259d6432b08e8a57
SHA256

b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e
SHA512

cb299228537ab9e51dd1eb6ac2f488f9b659dd421337d9033486efe7acbc62918e4765abe20e6d5ea8f9c6453cf3d9a2f934d45755db84aea47a9bf2acd3e1ea
SSDEEP

192:MA7/AIwPI9xHUn0zRblHk33+/VGzZC3BUOhOOZKdR:b/vmaxNRblHOqmOpW

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://jamnnd.duckdns.org:8024

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

4 2008 wscript.exe

flow	pid	process
4	2008	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\malware.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\malware.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-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\W56OZZRQKW = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\malware.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

308 schtasks.exe

pid	process
308	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2008 wrote to memory of 308	2008	wscript.exe	schtasks.exe
PID 2008 wrote to memory of 308	2008	wscript.exe	schtasks.exe
PID 2008 wrote to memory of 308	2008	wscript.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\malware.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2008

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\malware.js
2⤵
- Creates scheduled task(s)
PID:308

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

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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