vjw0rm | fe600a14c248e3b48d78d1d5672e666f4de42a43e741c052a679b70ba21db345

Analysis

max time kernel
146s
max time network
149s
platform
windows10_x64
resource
win10v20210410
submitted
15-04-2021 17:52

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General

Target

dcfbOrderReceipt.js
Size

100KB
MD5

5a4a84e1a479495eb777655eda9079d0
SHA1

8e7174ee55fa09fc7943c4e7116077354696de00
SHA256

fe600a14c248e3b48d78d1d5672e666f4de42a43e741c052a679b70ba21db345
SHA512

dc5662bb79e7faf0dcb1c5c621173fd7f864872c26e8ad2e1cafc02ac1ea9a9fecee05bb122a35846e3643d2d23cc9702d6ab0b443b4040354c2d2124af21475

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 1016 wscript.exe

flow	pid	process
8	1016	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\dcfbOrderReceipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dcfbOrderReceipt.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-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\UKRZWF15HK = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\dcfbOrderReceipt.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

1440 schtasks.exe

pid	process
1440	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1016 wrote to memory of 1440	1016	wscript.exe	schtasks.exe
PID 1016 wrote to memory of 1440	1016	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\dcfbOrderReceipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1016

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\dcfbOrderReceipt.js
2⤵
- Creates scheduled task(s)
PID:1440

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/1440-114-0x0000000000000000-mapping.dmp

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