vjw0rm | 0fe50396b25c43452630b9cac1e2ddda31a9358cb7be5e8145cf382fc6e8d95c

Analysis

max time kernel
137s
max time network
142s
platform
windows10_x64
resource
win10v20210408
submitted
21-08-2021 21:30

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General

Target

W00902_Invoice_Payment.js
Size

12KB
MD5

2d59355fbdada25c304edf911a63281d
SHA1

2200956e98b3b32e0693ed54af08b3372f541f37
SHA256

0fe50396b25c43452630b9cac1e2ddda31a9358cb7be5e8145cf382fc6e8d95c
SHA512

27b74c61783b8f97d55f89759bb6407eba558675ae2287f3df1572473b31578a3dd6eaa2222d45fb29b0518602b42a274b56f325447febcff6eac29bd7c498ff

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

8 856 wscript.exe

flow	pid	process
8	856	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\W00902_Invoice_Payment.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\W00902_Invoice_Payment.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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\O3FNWNFPWY = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\W00902_Invoice_Payment.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

3184 schtasks.exe

pid	process
3184	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 856 wrote to memory of 3184	856	wscript.exe	schtasks.exe
PID 856 wrote to memory of 3184	856	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\W00902_Invoice_Payment.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:856

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\W00902_Invoice_Payment.js
2⤵
- Creates scheduled task(s)
PID:3184

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/3184-114-0x0000000000000000-mapping.dmp

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