wshrat | ba25eeb1352d5aab2e09eaa942324510ecd964671e7def1e158c3a543534ca1b

General

Target

f94bfce5384f10201df977d67ea6c5d1.js
Size

179KB
MD5

f94bfce5384f10201df977d67ea6c5d1
SHA1

fb5f56e7e554d466b6ca7264c2748826daac8cc7
SHA256

ba25eeb1352d5aab2e09eaa942324510ecd964671e7def1e158c3a543534ca1b
SHA512

492e18b7a219734a9564bd330f5350582bd3c01d72ce0eb491343777d32dec5162c6deaf2c97ee6d6f68e1e2a025182dc20312fc4fe7c1024e0970ab1056ef65

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 2 IoCs

resource	yara_rule
behavioral2/files/0x000800000000068f-3.dat	family_wshrat
behavioral2/files/0x000200000001ab59-4.dat	family_wshrat

Blocklisted process makes network request 25 IoCs

flow	pid	Process
7	3508	wscript.exe
8	3508	wscript.exe
14	3508	wscript.exe
18	3508	wscript.exe
19	3508	wscript.exe
20	3508	wscript.exe
21	3508	wscript.exe
22	3508	wscript.exe
23	3508	wscript.exe
24	3508	wscript.exe
25	3508	wscript.exe
26	3508	wscript.exe
27	3508	wscript.exe
28	3508	wscript.exe
29	3508	wscript.exe
30	3508	wscript.exe
31	3508	wscript.exe
32	3508	wscript.exe
33	3508	wscript.exe
34	3508	wscript.exe
35	3508	wscript.exe
36	3508	wscript.exe
37	3508	wscript.exe
38	3508	wscript.exe
39	3508	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\f94bfce5384f10201df977d67ea6c5d1.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\f94bfce5384f10201df977d67ea6c5d1.js	wscript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\f94bfce5384f10201df977d67ea6c5d1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\f94bfce5384f10201df977d67ea6c5d1.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\f94bfce5384f10201df977d67ea6c5d1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\f94bfce5384f10201df977d67ea6c5d1.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\f94bfce5384f10201df977d67ea6c5d1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\f94bfce5384f10201df977d67ea6c5d1.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\f94bfce5384f10201df977d67ea6c5d1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\f94bfce5384f10201df977d67ea6c5d1.js\""	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
6	ip-api.com

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4776 wrote to memory of 3508	4776	wscript.exe	74
PID 4776 wrote to memory of 3508	4776	wscript.exe	74

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\f94bfce5384f10201df977d67ea6c5d1.js
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4776
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\f94bfce5384f10201df977d67ea6c5d1.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:3508

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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