d98aab09f963cdc05a6c8e77bd0a75ab45075998b423c67b5edf59ee6371ae1b

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04-02-2024 17:40

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General

Target

8fc24407671c79b675c98492ace8f104.exe
Size

14KB
MD5

8fc24407671c79b675c98492ace8f104
SHA1

ba12301c575c94aec20f5986d0550eb9c8825979
SHA256

d98aab09f963cdc05a6c8e77bd0a75ab45075998b423c67b5edf59ee6371ae1b
SHA512

b8f1e6369ab625d3540aeb40be0714637c674e5cb7bacde49d24b263f8dd10f78de20b690eaeebe1a67af47f2ae3975f502bc7fb6df79bdc3ceee0f4340749cc
SSDEEP

384:AZGxEZ5FT3Ntxk3Bj93qmmuxBxVppBYklN18ilvHM9QrTUU3WZ0zrze:DOZ5Bq3qm3xbpBYklL8iJkwIS/zne

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\vnkatcyy.dll = "{D3112B69-A745-4805-874E-ABD480EA1299}"	8fc24407671c79b675c98492ace8f104.exe

Deletes itself 1 IoCs

pid	Process
2616	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2380	8fc24407671c79b675c98492ace8f104.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\vnkatcyy.nls	8fc24407671c79b675c98492ace8f104.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D3112B69-A745-4805-874E-ABD480EA1299}	8fc24407671c79b675c98492ace8f104.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D3112B69-A745-4805-874E-ABD480EA1299}\InProcServer32	8fc24407671c79b675c98492ace8f104.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D3112B69-A745-4805-874E-ABD480EA1299}\InProcServer32\ = "C:\\Windows\\SysWow64\\vnkatcyy.dll"	8fc24407671c79b675c98492ace8f104.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D3112B69-A745-4805-874E-ABD480EA1299}\InProcServer32\ThreadingModel = "Apartment"	8fc24407671c79b675c98492ace8f104.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2380	8fc24407671c79b675c98492ace8f104.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2380	8fc24407671c79b675c98492ace8f104.exe
2380	8fc24407671c79b675c98492ace8f104.exe
2380	8fc24407671c79b675c98492ace8f104.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2616	2380	8fc24407671c79b675c98492ace8f104.exe	28
PID 2380 wrote to memory of 2616	2380	8fc24407671c79b675c98492ace8f104.exe	28
PID 2380 wrote to memory of 2616	2380	8fc24407671c79b675c98492ace8f104.exe	28
PID 2380 wrote to memory of 2616	2380	8fc24407671c79b675c98492ace8f104.exe	28

C:\Users\Admin\AppData\Local\Temp\8fc24407671c79b675c98492ace8f104.exe
"C:\Users\Admin\AppData\Local\Temp\8fc24407671c79b675c98492ace8f104.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\8315.tmp.bat
  2⤵
  - Deletes itself
  PID:2616

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\8315.tmp.bat

Filesize
179B

MD5
de42ab264bf73f41d7b9ef3240c5f4ea

SHA1
79888c22ed30916cc13a4ab2d3cfc08ad1cfa98a

SHA256
0c72e28d7b1ef785b379037053fb48cc299f8230ee22de2347d7f8485a477871

SHA512
5b2bd34aec956f27d6f665a565a57bfaa8ac5bcf1a3bbf1868565ada4e81279c4073fc57fe03995b06779f782226a059d42b5a432e1d4e5589dc507d58f8587b

Download Submit
C:\Users\Admin\AppData\Local\Temp\vnkatcyy.tmp

Filesize
83KB

MD5
6c4d3f1037f7ded0a5baea22b62d08d2

SHA1
ea607b2eb7000bb8bfd6a4b4712fa542a24ab00d

SHA256
9c6e69cfb9750a00d029caa4845f22a440a7c9a4d92f15106d8fee6196fa618f

SHA512
38051bab0c476b768318c27192b6731885c69cd1e2f20ad19be9e37aea1a0d1d575746056f94f635c15626353e3be03b77f572e0165ecf015121632422ac440b

Download Submit
\Windows\SysWOW64\vnkatcyy.dll

Filesize
2.4MB

MD5
07a46cd27bdfc86b283d4b22872d3047

SHA1
1bdbb84e1acff69488a2e4bb9a22c49b5b3abb4e

SHA256
7bcc05a5d7d7866371fd1f03f2f9490d12b7d8fb04b014a3fb963c89943ea6a7

SHA512
b06900154c4bed48d6600f1862ac30779dbeae687a72cb869a1dcfb7dd1cf09be08e95d1d07f5b21ec8ea97302ec738229554c5b04a4acf5578b87b228ca206b

Download Submit
memory/2380-16-0x0000000010000000-0x000000001006C000-memory.dmp

Filesize
432KB

Download
memory/2380-25-0x0000000010000000-0x000000001006C000-memory.dmp

Filesize
432KB

Download