vjw0rm | f24f9cffe9e9673cd1dd71a3b2b3f904a7a44bc4d4cc085362450f51e9623a5c

General

Target

Voucher_4093.js
Size

9KB
MD5

5232adca452765d2f6f4d552afdc6230
SHA1

f6e0fe80b48f1a5022a864552be66acf42e91091
SHA256

87ac3e5dc3d4a3bf8aba37d4c994d2574187cb21118182d7b25ac167ec421d33
SHA512

bc8c478e5a86733d0101a6a87bf7b1acb870f31dc0df0ef5909a069aa3833b4d6fd124b146b4658686e2a0b932071ea55120147e2736c2a85729a7ac5ee18034

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 5 IoCs

Processes:

wscript.exe

flow pid process

34 1140 wscript.exe
50 1140 wscript.exe
62 1140 wscript.exe
63 1140 wscript.exe
69 1140 wscript.exe

flow	pid	process
34	1140	wscript.exe
50	1140	wscript.exe
62	1140	wscript.exe
63	1140	wscript.exe
69	1140	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

Processes:

wscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	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\Voucher_4093.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Voucher_4093.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-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\N0Z2YR4R55 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Voucher_4093.js\""	wscript.exe

Drops file in Windows directory 8 IoCs

Processes:

svchost.exeTiWorker.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe
File opened for modification	C:\Windows\WinSxS\pending.xml	TiWorker.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.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

1764 schtasks.exe

pid	process
1764	schtasks.exe

Suspicious use of AdjustPrivilegeToken 54 IoCs

Processes:

svchost.exeTiWorker.exe

description	pid	process
Token: SeShutdownPrivilege	3396	svchost.exe
Token: SeCreatePagefilePrivilege	3396	svchost.exe
Token: SeShutdownPrivilege	3396	svchost.exe
Token: SeCreatePagefilePrivilege	3396	svchost.exe
Token: SeShutdownPrivilege	3396	svchost.exe
Token: SeCreatePagefilePrivilege	3396	svchost.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe
Token: SeBackupPrivilege	4968	TiWorker.exe
Token: SeRestorePrivilege	4968	TiWorker.exe
Token: SeSecurityPrivilege	4968	TiWorker.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1140 wrote to memory of 1764	1140	wscript.exe	schtasks.exe
PID 1140 wrote to memory of 1764	1140	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Voucher_4093.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:1140
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Voucher_4093.js
  2⤵
  - Creates scheduled task(s)
  PID:1764

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3396

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4968