vjw0rm | 7f2fb0a3a6b84705ed3440f3a284b947c57d97ee21dafd6e0ce8e691dabc1628

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-en-20211014
submitted
06-12-2021 03:51

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General

Target

87165304PaymentInvoiceReceipt.js
Size

81KB
MD5

dc3a4c8f39d6969e83d6bf43e207bd56
SHA1

3c5731d3ed4f8bb7ddc400c1f53d61ed6f191f4e
SHA256

7f2fb0a3a6b84705ed3440f3a284b947c57d97ee21dafd6e0ce8e691dabc1628
SHA512

7464f5f8668e5fe3d1855a7306d2074486b53e1d56ae274be7db5c1fc802039854d5e6188f9152f5fcbc54c5383ba7dd30e4755cbce9766a0b51945b660033fa

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://3000js.duckdns.org:3000

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

5 600 wscript.exe

flow	pid	process
5	600	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\87165304PaymentInvoiceReceipt.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\87165304PaymentInvoiceReceipt.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-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows\CurrentVersion\Run\V84MXTSUBM = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\87165304PaymentInvoiceReceipt.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

1992 schtasks.exe

pid	process
1992	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 600 wrote to memory of 1992	600	wscript.exe	schtasks.exe
PID 600 wrote to memory of 1992	600	wscript.exe	schtasks.exe
PID 600 wrote to memory of 1992	600	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\87165304PaymentInvoiceReceipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:600
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\87165304PaymentInvoiceReceipt.js
  2⤵
  - Creates scheduled task(s)
  PID:1992

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/600-55-0x000007FEFBB41000-0x000007FEFBB43000-memory.dmp

Filesize
8KB

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memory/1992-56-0x0000000000000000-mapping.dmp

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