vjw0rm | c560351620b68f01085c6b449e5256c617ea7eed70451f6c08900c694c08b92e

Analysis

max time kernel
145s
max time network
182s
platform
windows7_x64
resource
win7v20210408
submitted
13-10-2021 18:44

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General

Target

H6X8V4C3C02M.PDF..js
Size

81KB
MD5

0448be9d3f5813d311fcdd8bb5d190ca
SHA1

1390e1726b9826b8c49a3f9519e7c04264f7c199
SHA256

c560351620b68f01085c6b449e5256c617ea7eed70451f6c08900c694c08b92e
SHA512

b6efdcb0198e3ae004516d2642acf39dd8f25ac80b8f36b14bd2b32306743ff1b9cefa7680d3b5b78f81a911be42942b27950eaddba45a3366f8bce2509769b6

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://7700js.duckdns.org:7700

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 1660 wscript.exe

flow	pid	process
8	1660	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\H6X8V4C3C02M.PDF..js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\H6X8V4C3C02M.PDF..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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\FM24ZGX1AP = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\H6X8V4C3C02M.PDF..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

1772 schtasks.exe

pid	process
1772	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1660 wrote to memory of 1772	1660	wscript.exe	schtasks.exe
PID 1660 wrote to memory of 1772	1660	wscript.exe	schtasks.exe
PID 1660 wrote to memory of 1772	1660	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\H6X8V4C3C02M.PDF..js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1660

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\H6X8V4C3C02M.PDF..js
2⤵
- Creates scheduled task(s)
PID:1772

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/1660-60-0x000007FEFC4A1000-0x000007FEFC4A3000-memory.dmp

Filesize
8KB

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memory/1772-61-0x0000000000000000-mapping.dmp

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