vjw0rm | f3238d349b2650f8e0446a2f73ef3d3fefec5d40268ebdf7eb42bc2ac8adec9e

Analysis

max time kernel
145s
max time network
182s
platform
windows7_x64
resource
win7-en-20210920
submitted
14-10-2021 18:01

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General

Target

F2JC6A4V49B7.js
Size

81KB
MD5

e9e4fc8abb66f8c5fcf22de751661a85
SHA1

0473d2d0d1049d350c0c4bf7d14abad002425106
SHA256

f3238d349b2650f8e0446a2f73ef3d3fefec5d40268ebdf7eb42bc2ac8adec9e
SHA512

0d5253b9892eaa58c0622712978e9fee38e2e38ab6756b63936b6878fc7b65439e6567a65b2fdb39baff4b1e22bb81afba1344396e66f155bacded0c12bc5334

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://6800js.duckdns.org:6800

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 9 IoCs

Processes:

wscript.exe

flow	pid	process
5	984	wscript.exe
7	984	wscript.exe
9	984	wscript.exe
12	984	wscript.exe
14	984	wscript.exe
20	984	wscript.exe
22	984	wscript.exe
24	984	wscript.exe
26	984	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\F2JC6A4V49B7.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\F2JC6A4V49B7.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\BYK43BSFUJ = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\F2JC6A4V49B7.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

1748 schtasks.exe

pid	process
1748	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 984 wrote to memory of 1748	984	wscript.exe	schtasks.exe
PID 984 wrote to memory of 1748	984	wscript.exe	schtasks.exe
PID 984 wrote to memory of 1748	984	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\F2JC6A4V49B7.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\F2JC6A4V49B7.js
2⤵
- Creates scheduled task(s)
PID:1748

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

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Downloads

memory/984-54-0x000007FEFB951000-0x000007FEFB953000-memory.dmp

Filesize
8KB

Download
memory/1748-55-0x0000000000000000-mapping.dmp

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