vjw0rm | 786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
28-03-2023 07:21

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General

Target

786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.js
Size

6KB
MD5

fb50b5a527b81faf53eb766fc69645e2
SHA1

30b12f026d2122f487973235e5d46651a3040996
SHA256

786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af
SHA512

6651176c8cf7815ea48790044873e9b4de1696bba52b2851217b392f5f2ab52bd807f07ac7ce115350520e5e3673be9425ff1fe46afae0ccccb058fd03b01481
SSDEEP

192:CZVh76ew2V2ZIPoH5Xi4FvfkumcR9E+dir8OE3:0V0ooH5Xi4xfkL3pIz3

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 15 IoCs

Processes:

wscript.exe

flow	pid	process
4	1084	wscript.exe
5	1084	wscript.exe
7	1084	wscript.exe
9	1084	wscript.exe
10	1084	wscript.exe
11	1084	wscript.exe
13	1084	wscript.exe
14	1084	wscript.exe
15	1084	wscript.exe
17	1084	wscript.exe
18	1084	wscript.exe
19	1084	wscript.exe
21	1084	wscript.exe
22	1084	wscript.exe
23	1084	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.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-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\NNS4R1BA4A = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.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

912 schtasks.exe

pid	process
912	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1084 wrote to memory of 912	1084	wscript.exe	schtasks.exe
PID 1084 wrote to memory of 912	1084	wscript.exe	schtasks.exe
PID 1084 wrote to memory of 912	1084	wscript.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1084

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\786b63ecc1fb8174eb1301a5498ba858ccac1978cb745afde8c8cd22c7c962af.js
2⤵
- Creates scheduled task(s)
PID:912

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

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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