vjw0rm | df00bcea8a8142b829ec1cef0561e456f7da68b97f7f8ba951762f4e64f41697

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7v20210410
submitted
13-04-2021 03:31

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General

Target

Invoice.js
Size

3KB
MD5

015f5153e12c7c2af015276690188d1c
SHA1

c2a1a42b90ff4235898d92b68a4b3217a0321d4c
SHA256

de9b4dcb5d1d41d031f4e66730d9dd51f4b447d66d736c6219bb5e5d02d27f2d
SHA512

7a540e840eae97e2c80d02017ae3a4d5e931e2f47a3b520106de59292fb64935e6ab3666be470ff0d8a0a8a4c8c1df1f4b097e9840a4da4cf34d981e10988419

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 28 IoCs

Processes:

wscript.exe

flow	pid	process
5	308	wscript.exe
6	308	wscript.exe
7	308	wscript.exe
8	308	wscript.exe
9	308	wscript.exe
10	308	wscript.exe
12	308	wscript.exe
13	308	wscript.exe
14	308	wscript.exe
15	308	wscript.exe
16	308	wscript.exe
17	308	wscript.exe
19	308	wscript.exe
20	308	wscript.exe
21	308	wscript.exe
22	308	wscript.exe
23	308	wscript.exe
24	308	wscript.exe
26	308	wscript.exe
27	308	wscript.exe
28	308	wscript.exe
29	308	wscript.exe
30	308	wscript.exe
31	308	wscript.exe
33	308	wscript.exe
34	308	wscript.exe
35	308	wscript.exe
36	308	wscript.exe

Drops startup file 1 IoCs

Processes:

wscript.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice.js wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice.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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\AJX04XO7JW = "\"C:\\Users\\Admin\\AppData\\Roaming\\Invoice.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

1376 schtasks.exe

pid	process
1376	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 308 wrote to memory of 1376	308	wscript.exe	schtasks.exe
PID 308 wrote to memory of 1376	308	wscript.exe	schtasks.exe
PID 308 wrote to memory of 1376	308	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Invoice.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:308

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Invoice.js
2⤵
- Creates scheduled task(s)
PID:1376

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/1376-60-0x0000000000000000-mapping.dmp

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