vjw0rm | 9983e71fb8871f7dab10c52965b7664f380a3a315eed14adebbb0c5db69a2ad5

Analysis

max time kernel
139s
max time network
156s
platform
windows7_x64
resource
win7-en-20210920
submitted
19-10-2021 08:33

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General

Target

C4HA5CK2MA6.js
Size

82KB
MD5

0619b7e2c22c9c92cb400ec14ca69767
SHA1

e684855f073c754067c9aa165944de464d37a4d8
SHA256

9983e71fb8871f7dab10c52965b7664f380a3a315eed14adebbb0c5db69a2ad5
SHA512

557b75a37b19cb615bf520cac33e5c89a165ac8919994924c6f16d1d883f0c3cecc6e7452a3d56ab39950bb5e863861cf65ae99d2cec9e658e1165ddd7e87498

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://5800js.duckdns.org:5800

Signatures

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

Blocklisted process makes network request 11 IoCs

Processes:

wscript.exe

flow	pid	process
5	2016	wscript.exe
7	2016	wscript.exe
9	2016	wscript.exe
11	2016	wscript.exe
13	2016	wscript.exe
15	2016	wscript.exe
17	2016	wscript.exe
18	2016	wscript.exe
19	2016	wscript.exe
22	2016	wscript.exe
24	2016	wscript.exe

Drops startup file 1 IoCs

Processes:

wscript.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\C4HA5CK2MA6.js wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\C4HA5CK2MA6.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\E0GN6YN504 = "'C:\\Users\\Admin\\AppData\\Roaming\\C4HA5CK2MA6.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

1588 schtasks.exe

pid	process
1588	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2016 wrote to memory of 1588	2016	wscript.exe	schtasks.exe
PID 2016 wrote to memory of 1588	2016	wscript.exe	schtasks.exe
PID 2016 wrote to memory of 1588	2016	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\C4HA5CK2MA6.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Roaming\C4HA5CK2MA6.js
  2⤵
  - Creates scheduled task(s)
  PID:1588

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/1588-54-0x0000000000000000-mapping.dmp

Download
memory/2016-53-0x000007FEFB691000-0x000007FEFB693000-memory.dmp

Filesize
8KB

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