vjw0rm | 2e59b22f26362321a0e7e3e5608108eaa4a78c31f2c09990ec8d468e38061326

Analysis

max time kernel
127s
max time network
160s
platform
windows7_x64
resource
win7v20210408
submitted
19-07-2021 22:03

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General

Target

ZW9HA3OKMA.js
Size

9KB
MD5

b12f18bbf06a2ef14d44e718e59c10c9
SHA1

f59ddd62f47020de9e61d9fb06ae9cbe6a51c583
SHA256

2e59b22f26362321a0e7e3e5608108eaa4a78c31f2c09990ec8d468e38061326
SHA512

03a11689b7bf71e736d622c6648a1e236e3849bce0dd9e55ba66047a9972e0a7110a07afb50f2c48336b5424baee5ca2fd15288f07a027307dd4844a4c3274fc

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

Processes:

wscript.exe

flow pid process

6 1920 wscript.exe

flow	pid	process
6	1920	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ZW9HA3OKMA.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ZW9HA3OKMA.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-1-5-21-2455352368-1077083310-2879168483-1000\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\OXKHGDB6LZ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\ZW9HA3OKMA.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

752 schtasks.exe

pid	process
752	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1920 wrote to memory of 752	1920	wscript.exe	schtasks.exe
PID 1920 wrote to memory of 752	1920	wscript.exe	schtasks.exe
PID 1920 wrote to memory of 752	1920	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\ZW9HA3OKMA.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1920

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\ZW9HA3OKMA.js
2⤵
- Creates scheduled task(s)
PID:752

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/752-60-0x0000000000000000-mapping.dmp

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