vjw0rm | 9f3abf6dd5ae995b5e1d5cdd6457ab61a95fa689b5fbac4c57916a547e1d3c5a

General

Target

PO202104-114.js
Size

202KB
MD5

4f7a5f22ef09e3fd02fc432d51ba12db
SHA1

bc55e8c16a3135feb3a0acb9a0e72e48e59e12df
SHA256

9f3abf6dd5ae995b5e1d5cdd6457ab61a95fa689b5fbac4c57916a547e1d3c5a
SHA512

bd59013fcd969385f455e371b3317a912b1330cd1af87201af863ac0a3f0e8872846b7cf8fccbc87986151f9694393720ee9e7a43933c2c137a0729447513128

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 18 IoCs

Processes:

WScript.exe

flow	pid	process
9	3828	WScript.exe
18	3828	WScript.exe
31	3828	WScript.exe
32	3828	WScript.exe
33	3828	WScript.exe
34	3828	WScript.exe
35	3828	WScript.exe
38	3828	WScript.exe
39	3828	WScript.exe
40	3828	WScript.exe
41	3828	WScript.exe
42	3828	WScript.exe
43	3828	WScript.exe
44	3828	WScript.exe
45	3828	WScript.exe
46	3828	WScript.exe
47	3828	WScript.exe
48	3828	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\uxPZcaKnkC.js	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\uxPZcaKnkC.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-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\uxPZcaKnkC.js\""	WScript.exe

Drops file in Program Files directory 12 IoCs

Processes:

javaw.exe

description	ioc	process
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\symbols\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\symbols\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\symbols\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\server\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\symbols\dll\jvm.pdb	javaw.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

wscript.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000_Classes\Local Settings wscript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000_Classes\Local Settings	wscript.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 2636 wrote to memory of 3828	2636	wscript.exe	WScript.exe
PID 2636 wrote to memory of 3828	2636	wscript.exe	WScript.exe
PID 2636 wrote to memory of 2736	2636	wscript.exe	javaw.exe
PID 2636 wrote to memory of 2736	2636	wscript.exe	javaw.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO202104-114.js
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\uxPZcaKnkC.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:3828
- C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe
  "C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\luazmleif.txt"
  2⤵
  - Drops file in Program Files directory
  PID:2736

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\luazmleif.txt

MD5
e5c57969a139fa14269758cb8cc8f9a7

SHA1
432f65c2b1da28b421eac3956d8cefd72f04ae6a

SHA256
b2b661ff89ba10a5a27a06df63a9ffd158b254aff5f38a96ff5c1f6344959501

SHA512
526f7f1717488c87457353d78480ec590d5abf5bf6bdc697dc92433c26a949c649b94bd83cfc7891c24fbc5e96414793fb9a192f77a3ded9ad434d8524a215d5

Download Submit
C:\Users\Admin\AppData\Roaming\uxPZcaKnkC.js

MD5
544e461cc49cb88916002eb81569f0ad

SHA1
2a5325d45b84e12126b2cc8766cc9741d79d0c3f

SHA256
88044969fcfb1bfd231ba53e225d4682696e53c5ce194d111968bde11b4c85ac

SHA512
9ec912681fd6047c1642f1b8737615fd6ea7101b2de8c3dbd1ba98437204b39f9d443d7bda887871f85a293d6134f33704c7e05ed04fb7506b4773fa536d0651

Download Submit
memory/2736-125-0x0000000002D50000-0x0000000002D60000-memory.dmp

Filesize
64KB

Download
memory/2736-129-0x0000000002D90000-0x0000000002DA0000-memory.dmp

Filesize
64KB

Download
memory/2736-119-0x0000000002AD0000-0x0000000002D40000-memory.dmp

Filesize
2.4MB

Download
memory/2736-120-0x0000000002AD0000-0x0000000002D40000-memory.dmp

Filesize
2.4MB

Download
memory/2736-121-0x0000000002760000-0x0000000002761000-memory.dmp

Filesize
4KB

Download
memory/2736-123-0x0000000002760000-0x0000000002761000-memory.dmp

Filesize
4KB

Download
memory/2736-126-0x0000000002D60000-0x0000000002D70000-memory.dmp

Filesize
64KB

Download
memory/2736-124-0x0000000002D40000-0x0000000002D50000-memory.dmp

Filesize
64KB

Download
memory/2736-139-0x0000000002E10000-0x0000000002E20000-memory.dmp

Filesize
64KB

Download
memory/2736-128-0x0000000002D80000-0x0000000002D90000-memory.dmp

Filesize
64KB

Download
memory/2736-127-0x0000000002D70000-0x0000000002D80000-memory.dmp

Filesize
64KB

Download
memory/2736-117-0x0000000000000000-mapping.dmp

Download
memory/2736-130-0x0000000002DA0000-0x0000000002DB0000-memory.dmp

Filesize
64KB

Download
memory/2736-132-0x0000000002DC0000-0x0000000002DD0000-memory.dmp

Filesize
64KB

Download
memory/2736-131-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

Filesize
64KB

Download
memory/2736-134-0x0000000002DD0000-0x0000000002DE0000-memory.dmp

Filesize
64KB

Download
memory/2736-135-0x0000000002DE0000-0x0000000002DF0000-memory.dmp

Filesize
64KB

Download
memory/2736-136-0x0000000002DF0000-0x0000000002E00000-memory.dmp

Filesize
64KB

Download
memory/2736-137-0x0000000002E00000-0x0000000002E10000-memory.dmp

Filesize
64KB

Download
memory/2736-138-0x0000000002760000-0x0000000002761000-memory.dmp

Filesize
4KB

Download
memory/3828-115-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads