vjw0rm | 1f9052ca261408f12934901fd1a8dd843138a8a7605a5aa1515374fa473b6153 | Triage

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
08/01/2024, 10:41 UTC

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General

Target

PO_00124563.js
Size

3KB
MD5

84f3ed3670d569603a669686ec959f29
SHA1

2ffc746cff0df8052944f69e57ce28badb8f8549
SHA256

8f75fa05aebed182cf2bf13cfe8b26720a76d1328fcfeb6eb2b25d65d0f3f6a2
SHA512

61245362e1a6840501d8c3859171cc32bf80784b387d0965e80b85cd72a56b73276324c6565298fd881c9a0605645d30a23aaface0d5191941daa0a4f636b423

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 6 IoCs

flow	pid	Process
5	1388	wscript.exe
6	1388	wscript.exe
7	1388	wscript.exe
9	1388	wscript.exe
10	1388	wscript.exe
11	1388	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO_00124563.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO_00124563.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Run\V3MC6BTMP1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PO_00124563.js\""	wscript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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.

Scheduled Task/Job

pid	Process
2256	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 2256	1388	wscript.exe	29
PID 1388 wrote to memory of 2256	1388	wscript.exe	29
PID 1388 wrote to memory of 2256	1388	wscript.exe	29

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\PO_00124563.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\PO_00124563.js
  2⤵
  - Creates scheduled task(s)
  PID:2256

Network

DNS

imf5565.duckdns.org

wscript.exe

Remote address:

8.8.8.8:53

Request

imf5565.duckdns.org

IN A

Response

imf5565.duckdns.org

IN A

37.120.137.201
DNS

imf5565.duckdns.org

wscript.exe

Remote address:

8.8.8.8:53

Request

imf5565.duckdns.org

IN A

Response
DNS

imf5565.duckdns.org

wscript.exe

Remote address:

8.8.8.8:53

Request

imf5565.duckdns.org

IN A
DNS

imf5565.duckdns.org

wscript.exe

Remote address:

8.8.8.8:53

Request

imf5565.duckdns.org

IN A

37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

152 B
3
37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

152 B
3
37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

152 B
3
37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

152 B
3
37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

152 B
3
37.120.137.201:24993

imf5565.duckdns.org

wscript.exe

52 B
1

8.8.8.8:53

imf5565.duckdns.org

dns

wscript.exe

260 B
146 B
4
2

DNS Request

imf5565.duckdns.org

DNS Request

imf5565.duckdns.org

DNS Request

imf5565.duckdns.org

DNS Request

imf5565.duckdns.org

DNS Response

37.120.137.201

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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