vjw0rm | 46b304cdebbfac4fc60dbb3a885f6442bf1ec6e7a15a23f10de75f4febe2cecc

Analysis

max time kernel
149s
max time network
161s
platform
windows10_x64
resource
win10v20210408
submitted
05-07-2021 17:01

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General

Target

PO #008661.js
Size

3KB
MD5

c9f67a83623894b769cda3123dd64db7
SHA1

7b469db6a066919c8b62e249e92b26dfdcf22fd5
SHA256

46b304cdebbfac4fc60dbb3a885f6442bf1ec6e7a15a23f10de75f4febe2cecc
SHA512

9ebd912945b15e2a42d765fa811963af28598a61ee94e5dcd84368733801055a079f02f96960a2079d451878406e394904bb27b75eda41180ad7dc45ef57c3a8

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

7 3492 wscript.exe

flow	pid	process
7	3492	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\PO #008661.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO #008661.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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\8KSMEJ1CM4 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PO #008661.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

1296 schtasks.exe

pid	process
1296	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 3492 wrote to memory of 1296	3492	wscript.exe	schtasks.exe
PID 3492 wrote to memory of 1296	3492	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\PO #008661.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3492

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\PO #008661.js
2⤵
- Creates scheduled task(s)
PID:1296

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

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Downloads

memory/1296-114-0x0000000000000000-mapping.dmp

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