vjw0rm | a6fe89c02b616aa5306befa5211b2b2747e3cec47639f6cb1e8d314a66c78f08

Analysis

max time kernel
140s
max time network
141s
platform
windows10_x64
resource
win10v20210408
submitted
16-04-2021 18:29

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General

Target

invoice @EA20551.js
Size

3KB
MD5

d416d7a6378a585c61af61a3a37ce910
SHA1

83498e6d85ff4245c8290636e0ab093a80df7f31
SHA256

a6fe89c02b616aa5306befa5211b2b2747e3cec47639f6cb1e8d314a66c78f08
SHA512

51731c4dfbb9483a1a100c939a040b18ffb1691381c720f08697f3a86c66270b01260c624ab64831461d4453c25a8b295bd4581ff57e06beae44f451c15fbba9

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

8 4664 wscript.exe

flow	pid	process
8	4664	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 @EA20551.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice @EA20551.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
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\QFZ6YPQKZF = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\invoice @EA20551.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	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

4100 schtasks.exe

pid	process
4100	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 4664 wrote to memory of 4100	4664	wscript.exe	schtasks.exe
PID 4664 wrote to memory of 4100	4664	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\invoice @EA20551.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4664

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 @EA20551.js
2⤵
- Creates scheduled task(s)
PID:4100

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/4100-114-0x0000000000000000-mapping.dmp

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