vjw0rm | b1024826ead65baa94ffbc7278ef7916504bf53f54b65fdfcd0d5189ad01e7c7

Analysis

max time kernel
147s
max time network
150s
platform
windows10_x64
resource
win10v20210410
submitted
15-04-2021 17:52

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General

Target

INVOICE#00725678.js
Size

3KB
MD5

a7705ae531841779f8054c912b6f7ad0
SHA1

ce8cc2255fc7876a132e8aca56888092e2dff222
SHA256

b1024826ead65baa94ffbc7278ef7916504bf53f54b65fdfcd0d5189ad01e7c7
SHA512

d8b0ca966bb2054bb923ce5a4635605dc945cd0f2e68f63df9f0e23fb68e51285638fe60c7d8f220f3a2a1d16f25bc6d19e3eff5bf13b88e31eee34f8ff9b03c

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

7 4016 wscript.exe

flow	pid	process
7	4016	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\INVOICE#00725678.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\INVOICE#00725678.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-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\Q84HIXRRUK = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\INVOICE#00725678.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

584 schtasks.exe

pid	process
584	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 4016 wrote to memory of 584	4016	wscript.exe	schtasks.exe
PID 4016 wrote to memory of 584	4016	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\INVOICE#00725678.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4016

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\INVOICE#00725678.js
2⤵
- Creates scheduled task(s)
PID:584

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/584-114-0x0000000000000000-mapping.dmp

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