vjw0rm | 66555e27267457b1ea719fb4ba3ca9412640b52019926ab2103ab331fab20bfb

General

Target

receipt.js
Size

19KB
MD5

c12a75906e13948499a20fdbdd20a84f
SHA1

b972af62f4a356f022f2f7c1e82e474d7d0ab177
SHA256

66555e27267457b1ea719fb4ba3ca9412640b52019926ab2103ab331fab20bfb
SHA512

6b9b68f5b570a28b144c7580e8b896514e7b08fb164324ef5b7f9c33d43756b750312081f53c3dca9242add8205cef2d681ae08eeb845c12b0e585380cea6efa

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

C2

http://warrr.duckdns.org:9997

Signatures

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

Blocklisted process makes network request 15 IoCs

Processes:

wscript.exewscript.exe

flow	pid	process
28	1404	wscript.exe
29	4868	wscript.exe
40	4868	wscript.exe
42	4868	wscript.exe
48	4868	wscript.exe
49	4868	wscript.exe
52	4868	wscript.exe
57	4868	wscript.exe
59	4868	wscript.exe
60	4868	wscript.exe
64	4868	wscript.exe
66	4868	wscript.exe
67	4868	wscript.exe
73	4868	wscript.exe
74	4868	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 3 IoCs

Processes:

wscript.exewscript.exe

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

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exewscript.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\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\egwgcQTTsK.js\""	wscript.exe
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\RV7KJCEOJC = "\"C:\\Users\\Admin\\AppData\\Roaming\\receipt.js\""	wscript.exe

Drops file in Windows directory 7 IoCs

Processes:

svchost.exeTiWorker.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\Logs\CBS\CBS.log	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

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

4748 schtasks.exe

pid	process
4748	schtasks.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

svchost.exeTiWorker.exe

description	pid	process
Token: SeShutdownPrivilege	740	svchost.exe
Token: SeCreatePagefilePrivilege	740	svchost.exe
Token: SeShutdownPrivilege	740	svchost.exe
Token: SeCreatePagefilePrivilege	740	svchost.exe
Token: SeShutdownPrivilege	740	svchost.exe
Token: SeCreatePagefilePrivilege	740	svchost.exe
Token: SeSecurityPrivilege	4008	TiWorker.exe
Token: SeRestorePrivilege	4008	TiWorker.exe
Token: SeBackupPrivilege	4008	TiWorker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1404 wrote to memory of 4868	1404	wscript.exe	wscript.exe
PID 1404 wrote to memory of 4868	1404	wscript.exe	wscript.exe
PID 1404 wrote to memory of 4748	1404	wscript.exe	schtasks.exe
PID 1404 wrote to memory of 4748	1404	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\receipt.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:1404
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\egwgcQTTsK.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:4868
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\receipt.js
  2⤵
  - Creates scheduled task(s)
  PID:4748

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:740

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:4008

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

C:\Users\Admin\AppData\Roaming\egwgcQTTsK.js

MD5
495e6539ceaf9dd7dedc8782c17b995e

SHA1
41dd327e945fc21d7e4803e213295511c612bdd8

SHA256
e4c006bd48649e4ff67e782db5724881aaec82ecb1cd2929d9454a04ba17a406

SHA512
44cae0658351eee91163a8bdd431c72266d528606b0517b606a85623c6eba78b4299a844bcc4bec41d41091c456792a6e39c16a694dae41219532e20999f2378

Download Submit
memory/740-131-0x0000014EFA930000-0x0000014EFA940000-memory.dmp

Filesize
64KB

Download
memory/740-132-0x0000014EFA990000-0x0000014EFA9A0000-memory.dmp

Filesize
64KB

Download
memory/740-133-0x0000014EFD690000-0x0000014EFD694000-memory.dmp

Filesize
16KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads