vjw0rm | fb578011fca33b512fe0f1b92cc192e57fee479a40a53e981ec61ab220b0922d

Analysis

max time kernel
147s
max time network
154s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
15-02-2023 15:07

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General

Target

HK SEMI CORPORATION CO,,Ltd.js
Size

3.5MB
MD5

fb91a4c36c78fec96b1aef40d2d59c5f
SHA1

6f80bcc9f8485e7486fc716c47e1f611d688649c
SHA256

fb578011fca33b512fe0f1b92cc192e57fee479a40a53e981ec61ab220b0922d
SHA512

77fd763cb36519248f72a9f821bd421733099e47510d508644cb616e8c321c9b9d7aaffe86f1da8c0023a90230263e32c62b73efe5ed31a304ab7d043820d38a
SSDEEP

6144:DDvsgmpFYY2BrelpSK0XjJr0JS3ZgFt6r6ZpT:DD7Yvt

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Extracted

Family

wshrat

http://45.139.105.174:1604

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 42 IoCs

flow	pid	Process
6	1108	wscript.exe
7	1096	wscript.exe
8	1096	wscript.exe
10	1108	wscript.exe
11	1096	wscript.exe
13	1096	wscript.exe
15	1108	wscript.exe
18	1096	wscript.exe
19	1108	wscript.exe
21	1096	wscript.exe
24	1096	wscript.exe
26	1108	wscript.exe
27	1096	wscript.exe
29	1096	wscript.exe
32	1108	wscript.exe
35	1096	wscript.exe
36	1096	wscript.exe
38	1108	wscript.exe
39	1096	wscript.exe
42	1108	wscript.exe
43	1096	wscript.exe
45	1096	wscript.exe
47	1108	wscript.exe
49	1096	wscript.exe
52	1096	wscript.exe
54	1108	wscript.exe
55	1096	wscript.exe
57	1108	wscript.exe
59	1096	wscript.exe
61	1096	wscript.exe
63	1108	wscript.exe
65	1096	wscript.exe
67	1096	wscript.exe
70	1108	wscript.exe
71	1096	wscript.exe
73	1108	wscript.exe
74	1096	wscript.exe
76	1096	wscript.exe
79	1108	wscript.exe
81	1096	wscript.exe
83	1096	wscript.exe
85	1108	wscript.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HK SEMI CORPORATION CO,,Ltd.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HK SEMI CORPORATION CO,,Ltd.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MseIaECScV.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MseIaECScV.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\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HK SEMI CORPORATION CO,,Ltd = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\HK SEMI CORPORATION CO,,Ltd.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\HK SEMI CORPORATION CO,,Ltd = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\HK SEMI CORPORATION CO,,Ltd.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

Script User-Agent 26 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	36	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	39	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	52	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	59	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	81	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	8	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	21	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	13	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	27	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	43	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	55	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	61	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	83	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	7	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	11	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	45	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	49	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	65	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	18	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	24	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	67	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	71	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	74	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	76	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	29	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript
HTTP User-Agent header	35	WSHRAT\|D44DAEDB\|ORXGKKZC\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 15/2/2023\|JavaScript

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 1108	1096	wscript.exe	26
PID 1096 wrote to memory of 1108	1096	wscript.exe	26
PID 1096 wrote to memory of 1108	1096	wscript.exe	26

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\HK SEMI CORPORATION CO,,Ltd.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\MseIaECScV.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:1108

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
346KB

MD5
339289603df3318aca13df3fbd83cb1d

SHA1
4319d597b9c8aa40be2ad7ad87667f486494313f

SHA256
252010fbdb5abc2de7f75cbf36fe37c9ad29c768b28eeba93de9208ea9ecba3a

SHA512
d35daf3b50e3210a2c59c2dc4ebd377c6eba29811aa509b706184129bf3e17d369c007ec4e676bb4a597fe13b85fedd221a559a445d6315ed787b76f42c9305a

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