vjw0rm | 2aa3d59f66c023633926e86785ce7492e065df9542a95aef04d5ba55bab5ad6d

Analysis

max time kernel
151s
max time network
155s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 01:47

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General

Target

209384WURN02_INVOICE.js
Size

300.4MB
MD5

324ea4563c1f9f8349dfd6592048ef95
SHA1

505733b71723992f01d2d9dd17bbffd279778df0
SHA256

56a714a8faadd448fb07af73ff8b5dc332af64509be712d7358553eee4878497
SHA512

cb8b5ecb2abf0318628b2c313343ff8372c85a306a3395a41785a23c4f58349d594ab4c58b95a2f3d46615d24817a487c7c941c690c63925490bdb346d1d0169
SSDEEP

192:OgmprDK00bmKUsJS4rw8kmwTb2aH2iApc747+ha1Vt7ClNrbkylrGpUfa1SXYoKt:LEkbU5j8VAHJAcN3mo+4Do

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 13 IoCs

Processes:

wscript.exe

flow	pid	process
4	1404	wscript.exe
5	1404	wscript.exe
7	1404	wscript.exe
9	1404	wscript.exe
10	1404	wscript.exe
11	1404	wscript.exe
13	1404	wscript.exe
14	1404	wscript.exe
15	1404	wscript.exe
17	1404	wscript.exe
18	1404	wscript.exe
19	1404	wscript.exe
21	1404	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\209384WURN02_INVOICE.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\209384WURN02_INVOICE.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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\LQWBC5KZO3 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\209384WURN02_INVOICE.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

952 schtasks.exe

pid	process
952	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1404 wrote to memory of 952	1404	wscript.exe	schtasks.exe
PID 1404 wrote to memory of 952	1404	wscript.exe	schtasks.exe
PID 1404 wrote to memory of 952	1404	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\209384WURN02_INVOICE.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1404

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\209384WURN02_INVOICE.js
2⤵
- Creates scheduled task(s)
PID:952

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/952-55-0x0000000000000000-mapping.dmp

Download
memory/1404-54-0x000007FEFBAB1000-0x000007FEFBAB3000-memory.dmp

Filesize
8KB

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