vjw0rm | 1ffd739d31490b0f576461d22ce118ec41c1a6ac8187de6ca694557416e47f2f

Analysis

max time kernel
149s
max time network
152s
platform
windows10_x64
resource
win10v20210410
submitted
11-05-2021 17:02

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General

Target

Receipt.js
Size

3KB
MD5

1d4ba76a11388a108e28b4bd497b0ae1
SHA1

3215560a49d8b730c02a761654b974ea1fa4affe
SHA256

1ffd739d31490b0f576461d22ce118ec41c1a6ac8187de6ca694557416e47f2f
SHA512

f159f70d65ddb9cf6f32791dd47d9c7deef604c9beedf613d7548fb0bdb0cc241a51b2717409a7b56f93a47c8a0f19fb9cfaf31c48c977526d3337f5faf5f7b2

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 1808 wscript.exe

flow	pid	process
8	1808	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\Receipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Receipt.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\SVAZS4FJFO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Receipt.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

1540 schtasks.exe

pid	process
1540	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1808 wrote to memory of 1540	1808	wscript.exe	schtasks.exe
PID 1808 wrote to memory of 1540	1808	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Receipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1808

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Receipt.js
2⤵
- Creates scheduled task(s)
PID:1540

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/1540-114-0x0000000000000000-mapping.dmp

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