vjw0rm | 60dc0a8be19240f01faaccb73e6ca2a36eecbacc4dec970da118a5a5a4c0806c

Analysis

max time kernel
139s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
11-09-2023 10:57

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

DOC290823-29082023144405.js
Size

27KB
MD5

ca14b59192253392826fc0112c58b5a3
SHA1

3062aa9e1ce73041e15e923b1434bf48b720090a
SHA256

60dc0a8be19240f01faaccb73e6ca2a36eecbacc4dec970da118a5a5a4c0806c
SHA512

15af45eb520ed208fcd16c4e08272d48c52284fc9bf45524f29c1f2686e9649ee4c9ab5492da5240f397fcec9c81edc7c7c62ad668bff0fa938aa45d9cfca4ff
SSDEEP

768:XR51sMQicU8KzTypDxM9GzRdxVvemUZZbthohf9AQ:B51XcUTAtldxBxUzth89AQ

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://severdops.ddns.net:5050

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
26	896	wscript.exe
57	896	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DOC290823-29082023144405.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2RJZ4PQJPY = "\"C:\\Users\\Admin\\AppData\\Roaming\\DOC290823-29082023144405.js\""	wscript.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{4CFE5D89-1066-496B-8BEA-474C3223499A}.catalogItem	svchost.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

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/Job

T1053

pid	Process
3720	schtasks.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 896 wrote to memory of 3720	896	wscript.exe	90
PID 896 wrote to memory of 3720	896	wscript.exe	90

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\DOC290823-29082023144405.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:896
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\DOC290823-29082023144405.js
  2⤵
  - Creates scheduled task(s)
  PID:3720

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:2092