wshrat | 1717e15dfe01d566d9e4880e4a4ccfdf7d2096d859e91cc1b8062afb61074060

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17-03-2024 00:18

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General

Target

cf72d509b3534e6ea44e8f27e8e24af6.exe
Size

734KB
MD5

cf72d509b3534e6ea44e8f27e8e24af6
SHA1

8088b36b5a9c6308bdeb11c01d8ff0fbe72b2702
SHA256

1717e15dfe01d566d9e4880e4a4ccfdf7d2096d859e91cc1b8062afb61074060
SHA512

da92da83857ce77b1d5a275c2be557cba140cb653cb2d15d66d5dfe53adbcaf0cf3eeab814ac54732ed4b5a09bbbf6e3272cfb33b2510f079ba6ff1505989129
SSDEEP

12288:ehkDgouVA2nxKkorvdRgQriDwOIxmxiZnYQE7PJcE4aCM+PKSXrEh6O6:uRmJkcoQricOIQxiZY1iaCMYKSDO6

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/0x000b00000001313f-3.dat	family_wshrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	2392	WScript.exe

Drops startup file 2 IoCs

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\UUN = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\UUN.js\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\UUN = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\UUN.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
3	ip-api.com

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe
2740	cf72d509b3534e6ea44e8f27e8e24af6.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 2392	2740	cf72d509b3534e6ea44e8f27e8e24af6.exe	28
PID 2740 wrote to memory of 2392	2740	cf72d509b3534e6ea44e8f27e8e24af6.exe	28
PID 2740 wrote to memory of 2392	2740	cf72d509b3534e6ea44e8f27e8e24af6.exe	28
PID 2740 wrote to memory of 2392	2740	cf72d509b3534e6ea44e8f27e8e24af6.exe	28

C:\Users\Admin\AppData\Local\Temp\cf72d509b3534e6ea44e8f27e8e24af6.exe
"C:\Users\Admin\AppData\Local\Temp\cf72d509b3534e6ea44e8f27e8e24af6.exe"
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\UUN.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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\Local\Temp\UUN.js

Filesize
123KB

MD5
6094df12286a36fb1428afc89e3c19c5

SHA1
e6f25d74194e1482fd597def62f0ae3ba48f9760

SHA256
0d233c96aa7f53cec4c2f23cec481e7bbfa19995b67c997f7edb94afe8cca8d9

SHA512
04a75076a5318730bb998e52de1403d41674f04d9c37cb28f096ff0c60da302f65a58ebbe224d74b3d22eed1d80b82c074bf06061fe31c0566f24ebffde28a0e

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads