vjw0rm | a89127ec0c19df41166916cfa4c199d97eade3ec4f0cf4d2281408cfe2790c2a

Analysis

max time kernel
137s
max time network
141s
platform
windows7_x64
resource
win7v20210408
submitted
15/04/2021, 17:52

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General

Target
Booking.js
Size 3KB
Sample210415-xp6e3ql2x2
SHA256 a89127ec0c19df41166916cfa4c199d97eade3ec4f0cf4d2281408cfe2790c2a
MD5 f68bfaf10007b75b933c2a2acab4d54c
SHA1 7cabe5b37ea9d22450e80d41378c5e8eefa7eea5
SHA512 7ea74f93293e6171338e896243e2ecb696c6b4fbd7cfeffba6e0312a4b8c3789a949e9a0e4e8a566f946d36ebaad59d8477fcaf7681e91b9cc399ff865219a8d
MD5 SHA1 SHA512

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 1 IoCs

flow	pid	Process
5	1668	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Booking.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Booking.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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\U1FBR8C2J2 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Booking.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
1520	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 1520	1668	wscript.exe	30
PID 1668 wrote to memory of 1520	1668	wscript.exe	30
PID 1668 wrote to memory of 1520	1668	wscript.exe	30

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Booking.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Booking.js
  2⤵
  - Creates scheduled task(s)
  PID:1520

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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