vjw0rm | 9b5c6c579c2dcff5c35cc16f59c49bd0d903edb8730e1f4f5424d33fdc19a677

Analysis

max time kernel
143s
max time network
154s
platform
windows10_x64
resource
win10v20210408
submitted
29-07-2021 17:39

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General

Target

Invoice.js
Size

3KB
MD5

f187bff85111c74bffe04e7148760bca
SHA1

e0436fb2079b01df779d28a29d3b52b4e5bae191
SHA256

9b5c6c579c2dcff5c35cc16f59c49bd0d903edb8730e1f4f5424d33fdc19a677
SHA512

bd548dc2a01c74181e365bb56e5b3346838bb29da2000479b93560b3966fa37549b77e25c64d6dfb9d081c82bca9690432ca656e1117dd4b9514bf7607efac49

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 6 IoCs

Processes:

wscript.exe

flow pid process

7 648 wscript.exe
15 648 wscript.exe
16 648 wscript.exe
17 648 wscript.exe
18 648 wscript.exe
19 648 wscript.exe

flow	pid	process
7	648	wscript.exe
15	648	wscript.exe
16	648	wscript.exe
17	648	wscript.exe
18	648	wscript.exe
19	648	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\Invoice.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice.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\QVCLNW3IY6 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Invoice.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

3988 schtasks.exe

pid	process
3988	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 648 wrote to memory of 3988	648	wscript.exe	schtasks.exe
PID 648 wrote to memory of 3988	648	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Invoice.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:648
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Invoice.js
  2⤵
  - Creates scheduled task(s)
  PID:3988

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/3988-114-0x0000000000000000-mapping.dmp

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