vjw0rm | 29ea901e52ccc57b80dbcf639ae63a45e704960ebe97f6c957e22c0f61e2e88b

General

Target
Voicemailmessage102210.js
Size 46KB
Sample220511-vfnebagebn
SHA256 29ea901e52ccc57b80dbcf639ae63a45e704960ebe97f6c957e22c0f61e2e88b
MD5 d0ba0fe21bf9d8fb4e03d08a326f8f56
SHA1 9a4aa8045782bd40df865ac4c35151a5d11ddee2
SHA512 5f6e157acf1f64496c49da5e53bceab1b7ce5fb5a6ad13c9b63800cc2316e2aad8c11f3c4b996811962cfdba1761a27f20bf93650f5d56f5f3bd6c49ea0c360b
MD5 SHA1 SHA512

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

C2

http://severdops.ddns.net:5050

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 2 IoCs

flow	pid	Process
14	4820	wscript.exe
23	4820	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cMoAdVmvFS.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cMoAdVmvFS.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Voicemailmessage102210.js	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\00FAYTSXGU = "\"C:\\Users\\Admin\\AppData\\Roaming\\cMoAdVmvFS.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\M25GT4GI4H = "\"C:\\Users\\Admin\\AppData\\Roaming\\Voicemailmessage102210.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

pid	Process
2208	schtasks.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 3468	4820	wscript.exe	79
PID 4820 wrote to memory of 3468	4820	wscript.exe	79
PID 4820 wrote to memory of 2208	4820	wscript.exe	81
PID 4820 wrote to memory of 2208	4820	wscript.exe	81

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Voicemailmessage102210.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\cMoAdVmvFS.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:3468
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Voicemailmessage102210.js
  2⤵
  - Creates scheduled task(s)
  PID:2208

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

cMoAdVmvFS.js

Path C:\Users\Admin\AppData\Roaming\cMoAdVmvFS.js
Size 15KB
SHA256 b07f4808e33b9e267453377dd42480810e4595867358401b4bab39cb14cae134
MD5 020cea2dbc30f46549d9e24266957c9e
SHA1 1ab116f54c00c190b5061ccfc4cbf855bc755146
SHA512 fd36f9b51260759419763200820fde0c48d98d0d795c9103bbe92ebbe4c07b446863e18e86860bd24f7e360ac063a5d470513ecba23be43f2b492a86a4b90be1
SSDEEP 192:4gQyfgWBuSfbRDl/I6otNk0/Z8ifczhdr0/R8MHBp4LjW0+5DCLADTiVSdCP9jdM:4QzAV8iEldryn3it+5OrK
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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