vjw0rm | 2c962931cbd7724909e416952b21f412890801380aea4e17e5590fc3f6c6e798

Analysis

max time kernel
287s
max time network
296s
platform
windows7_x64
resource
win7-en-20211208
submitted
21-12-2021 19:38

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General

Target

ZXTEJDJGDMND.js
Size

9KB
MD5

4bf6f13902c5c69baf11914cc4c6eb4c
SHA1

5fcb4b1f0092a79c2f050c678a69fbc6ee8e2852
SHA256

d1d87467831ba4b691160509772995bb99ce7d2abcc96bd6b6cdd6ec1af058dc
SHA512

1b3ecdf7dd4a8541c80d0fa51359228bdb10687715697cb1ceaea8e14d36db5f6f53425a3e5f065797faf2ff8ebdc7c9afe5e32a9149de1d81e79b68a10dbaa9

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 11 IoCs

Processes:

wscript.exe

flow	pid	process
5	968	wscript.exe
6	968	wscript.exe
7	968	wscript.exe
9	968	wscript.exe
10	968	wscript.exe
11	968	wscript.exe
13	968	wscript.exe
14	968	wscript.exe
15	968	wscript.exe
17	968	wscript.exe
18	968	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\ZXTEJDJGDMND.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ZXTEJDJGDMND.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-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\POXI8QWF6K = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\ZXTEJDJGDMND.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

916 schtasks.exe

pid	process
916	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 968 wrote to memory of 916	968	wscript.exe	schtasks.exe
PID 968 wrote to memory of 916	968	wscript.exe	schtasks.exe
PID 968 wrote to memory of 916	968	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\ZXTEJDJGDMND.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:968
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\ZXTEJDJGDMND.js
  2⤵
  - Creates scheduled task(s)
  PID:916

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1068

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

Replay Monitor

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Downloads

memory/916-53-0x0000000000000000-mapping.dmp

Download
memory/1068-54-0x000007FEFB571000-0x000007FEFB573000-memory.dmp

Filesize
8KB

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