wshrat | 7883f82c94fd38e3943d462cb570c14bff692c82664c41f6520f4fbea9b7b3d8

Analysis

max time kernel
145s
max time network
150s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
19-05-2023 02:08

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General

Target

ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js
Size

188KB
MD5

f1a629154f159093b39b5f24c2413e5f
SHA1

1036b4213b6ca79a86e00fc5b752fba43e3e6ad6
SHA256

ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34
SHA512

180b7f8b8c27cf089788d2567eec7259799f0ee4abf141e82a6036708fd3c94d50870f3345bc7997af5c54eea7a7f994e61015db6ad50030dc3c95f17ee4bab6
SSDEEP

3072:9t+ZIeGK/6kbIpklgVDSxGfmuZcUZTbURC9qQ0bamCc8ovEztk:9wueGKlAklgF2GuuZcZRCfMAc84X

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

WSHRAT payload 1 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000122de-59.dat	family_wshrat

Blocklisted process makes network request 21 IoCs

flow	pid	Process
4	1480	wscript.exe
6	1480	wscript.exe
7	1480	wscript.exe
8	1480	wscript.exe
10	1480	wscript.exe
12	1480	wscript.exe
13	1480	wscript.exe
15	1480	wscript.exe
16	1480	wscript.exe
17	1480	wscript.exe
19	1480	wscript.exe
20	1480	wscript.exe
21	1480	wscript.exe
23	1480	wscript.exe
24	1480	wscript.exe
25	1480	wscript.exe
27	1480	wscript.exe
28	1480	wscript.exe
29	1480	wscript.exe
31	1480	wscript.exe
32	1480	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.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
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\software\microsoft\windows\currentversion\run	wscript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	ip-api.com

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

System Information Discovery
T1082

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:1480

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34.js

Filesize
188KB

MD5
f1a629154f159093b39b5f24c2413e5f

SHA1
1036b4213b6ca79a86e00fc5b752fba43e3e6ad6

SHA256
ac6fc6a98a2a3944477156cab221166f6ee535d1a9d91c66171914091af24d34

SHA512
180b7f8b8c27cf089788d2567eec7259799f0ee4abf141e82a6036708fd3c94d50870f3345bc7997af5c54eea7a7f994e61015db6ad50030dc3c95f17ee4bab6

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