vjw0rm | 6105effb02ed3d170a6be694ae9a2dee8d18aa0031ff37bd1d7c654dfcdc1de8

Analysis

max time kernel
132s
max time network
149s
platform
windows10_x64
resource
win10v20201028
submitted
29-03-2021 18:11

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General

Target

a3030OrderReceipt.js
Size

102KB
MD5

76dc43bfd29712825afa55b64a08288b
SHA1

61951a4ff5c962d0d89a591c7e36f30dc1654386
SHA256

6105effb02ed3d170a6be694ae9a2dee8d18aa0031ff37bd1d7c654dfcdc1de8
SHA512

369bd713f05506273b5dbafcbb79d31a7574eceeb08cd10bf2e7c185712178e9af30d17e4260461c542e31c9f3a0e694c36337261175b9962ce5b5bd0579ef51

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

6 652 wscript.exe

flow	pid	process
6	652	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\a3030OrderReceipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a3030OrderReceipt.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-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\VFYLK8FY3G = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\a3030OrderReceipt.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

3524 schtasks.exe

pid	process
3524	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 652 wrote to memory of 3524	652	wscript.exe	schtasks.exe
PID 652 wrote to memory of 3524	652	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\a3030OrderReceipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:652

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\a3030OrderReceipt.js
2⤵
- Creates scheduled task(s)
PID:3524

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/652-2-0x0000013C72590000-0x0000013C72594000-memory.dmp

Filesize
16KB

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memory/3524-3-0x0000000000000000-mapping.dmp

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