vjw0rm | 81b9f8cbef011f498682a359eb362e8ba25fb5cb18a7c6197d5ea22a05ffde04

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
01/03/2023, 01:48

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General

Target
3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js
Size 99KB
Sample230301-b8jgaaeb23
SHA256 3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7
MD5 cf8263bd95c97a1b5e3932134a9172c5
SHA1 a9b0e170b17e8236b7e55c9399411ef173422737
SHA512 c59b797ff20cd94769db06012187d0f54ca8701c3a4bd92ed1661242311e29e6d6ea14fac65fb2607646ab577ef1d5f6351e105a0aa64d3039604d8bbef69ead
SSDEEP 192:nluzi75WbAZvs1hdh12cB5kw94tMa3dZYkVdPrv1kc4uIVLk5/lWWWnazewBB5je:cz5Kyy24jHuMqWWyB1KSqmjm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://66.154.102.135:9909

Signatures

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	2280	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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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

pid	Process
3992	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 3992	2280	wscript.exe	84
PID 2280 wrote to memory of 3992	2280	wscript.exe	84

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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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:2280
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js
  2⤵
  - Creates scheduled task(s)
  PID:3992

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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