vjw0rm | 45c58c8acba2fc00f3b054e715b07bd1a50c8076232aaae1b755d1be1f6640da

General

Target

1.js
Size

10KB
MD5

d2aa6ce87b5a04efe5f7f1781c9532a8
SHA1

cf65ab36eee3dc8479a6dad4cecfd67ce78afd7e
SHA256

45c58c8acba2fc00f3b054e715b07bd1a50c8076232aaae1b755d1be1f6640da
SHA512

f6b069d932f317969b89df9d9e2c527d50a26e75fce250c9faacd6114be91cf91cdbf8d11b067f09e90a6d62e9e63ae9ee80d19b7986beb10a7c6af415901e37

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 4 IoCs

Processes:

wscript.exe

flow pid process

14 4612 wscript.exe
34 4612 wscript.exe
41 4612 wscript.exe
45 4612 wscript.exe

flow	pid	process
14	4612	wscript.exe
34	4612	wscript.exe
41	4612	wscript.exe
45	4612	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\1.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1.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\J8L3A3O1S6 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\1.js\""	wscript.exe

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
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\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	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

4084 schtasks.exe

pid	process
4084	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

svchost.exe

description	pid	process
Token: SeShutdownPrivilege	1036	svchost.exe
Token: SeCreatePagefilePrivilege	1036	svchost.exe
Token: SeShutdownPrivilege	1036	svchost.exe
Token: SeCreatePagefilePrivilege	1036	svchost.exe
Token: SeShutdownPrivilege	1036	svchost.exe
Token: SeCreatePagefilePrivilege	1036	svchost.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 4612 wrote to memory of 4084	4612	wscript.exe	schtasks.exe
PID 4612 wrote to memory of 4084	4612	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\1.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:4612

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\1.js
2⤵
- Creates scheduled task(s)
PID:4084

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:1036

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1036-133-0x000002513B1A0000-0x000002513B1B0000-memory.dmp

Filesize
64KB

Download
memory/1036-140-0x000002513DF20000-0x000002513DF24000-memory.dmp

Filesize
16KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads