vjw0rm | df4b5433be2f699b83be1bc1b006c0e04c2e455e0386a630f307086d00913012

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-en-20211104
submitted
03-12-2021 16:12

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General

Target

#W001GHSAUOE.js
Size

9KB
MD5

36c3359bca64a2b82522683affa53890
SHA1

caf2f131cc751a5c7bdf4567cb3cc9cbd8d09518
SHA256

df4b5433be2f699b83be1bc1b006c0e04c2e455e0386a630f307086d00913012
SHA512

2a761f26c49ef557b6354ccd40f2da848040fdbf7cd9bab22cf4264ad9c44f74e024c8de3e8e2ff5c16335e26e2bc8b67dacd223d53b69792582c4b1a83811f4

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://russolouis49.duckdns.org:7903

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Blocklisted process makes network request 7 IoCs

Processes:

wscript.exe

flow pid process

5 1412 wscript.exe
6 1412 wscript.exe
7 1412 wscript.exe
8 1412 wscript.exe
9 1412 wscript.exe
10 1412 wscript.exe
11 1412 wscript.exe

flow	pid	process
5	1412	wscript.exe
6	1412	wscript.exe
7	1412	wscript.exe
8	1412	wscript.exe
9	1412	wscript.exe
10	1412	wscript.exe
11	1412	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\#W001GHSAUOE.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#W001GHSAUOE.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-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Windows\CurrentVersion\Run\UTQQ1VQ08A = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#W001GHSAUOE.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

1740 schtasks.exe

pid	process
1740	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1412 wrote to memory of 1740	1412	wscript.exe	schtasks.exe
PID 1412 wrote to memory of 1740	1412	wscript.exe	schtasks.exe
PID 1412 wrote to memory of 1740	1412	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\#W001GHSAUOE.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1412
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#W001GHSAUOE.js
  2⤵
  - Creates scheduled task(s)
  PID:1740

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/1740-55-0x0000000000000000-mapping.dmp

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