3311fbb32acf6d00f0998e557f0a6ef7c1586232586a9069601db9ad72e7d59f

Analysis

max time kernel
177s
max time network
189s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 13:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

1a365b3dd9a3b049814b3e4ad813c4d8.exe
Size

1.6MB
MD5

1a365b3dd9a3b049814b3e4ad813c4d8
SHA1

4eed488cb6e8d66dbffd3eb6481e91de9830025c
SHA256

3311fbb32acf6d00f0998e557f0a6ef7c1586232586a9069601db9ad72e7d59f
SHA512

63d655bdda4fe599b1d24b35b448039db872e323caff112203b35614068cd2f77aeac16cadfbb1cfa1ad221c270434bcd39f2608e59ec4b1241099f1ad8c4f67
SSDEEP

12288:blIX21g+kD1t5m1HX71j2TzgNOe099zUdcVlNPu90eDDJph:u5+kRt5mVXBczgNP099zUa1K0Sh

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	1a365b3dd9a3b049814b3e4ad813c4d8.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	1a365b3dd9a3b049814b3e4ad813c4d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	1a365b3dd9a3b049814b3e4ad813c4d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	services.exe

Modifies Installed Components in the registry 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	services.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}	1a365b3dd9a3b049814b3e4ad813c4d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	1a365b3dd9a3b049814b3e4ad813c4d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	1a365b3dd9a3b049814b3e4ad813c4d8.exe

Executes dropped EXE 2 IoCs

pid	Process
4852	fservice.exe
2796	services.exe

Loads dropped DLL 3 IoCs

pid	Process
2796	services.exe
2796	services.exe
2796	services.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	1a365b3dd9a3b049814b3e4ad813c4d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	services.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\fservice.exe-up.txt	fservice.exe
File created	C:\Windows\SysWOW64\fservice.exe	fservice.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	fservice.exe
File created	C:\Windows\SysWOW64\winkey.dll	services.exe
File created	C:\Windows\SysWOW64\reginv.dll	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	1a365b3dd9a3b049814b3e4ad813c4d8.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	1a365b3dd9a3b049814b3e4ad813c4d8.exe

Drops file in Windows directory 8 IoCs

description	ioc	Process
File created	C:\Windows\system\sservice.exe	services.exe
File created	C:\Windows\system\sservice.exe	1a365b3dd9a3b049814b3e4ad813c4d8.exe
File opened for modification	C:\Windows\system\sservice.exe	1a365b3dd9a3b049814b3e4ad813c4d8.exe
File created	C:\Windows\services.exe	fservice.exe
File opened for modification	C:\Windows\services.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	fservice.exe
File opened for modification	C:\Windows\system\sservice.exe	fservice.exe
File created	C:\Windows\services.exe-up.txt	services.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe
2796	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2796	services.exe
2796	services.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 4852	3500	1a365b3dd9a3b049814b3e4ad813c4d8.exe	95
PID 3500 wrote to memory of 4852	3500	1a365b3dd9a3b049814b3e4ad813c4d8.exe	95
PID 3500 wrote to memory of 4852	3500	1a365b3dd9a3b049814b3e4ad813c4d8.exe	95
PID 4852 wrote to memory of 2796	4852	fservice.exe	96
PID 4852 wrote to memory of 2796	4852	fservice.exe	96
PID 4852 wrote to memory of 2796	4852	fservice.exe	96
PID 2796 wrote to memory of 1900	2796	services.exe	97
PID 2796 wrote to memory of 1900	2796	services.exe	97
PID 2796 wrote to memory of 1900	2796	services.exe	97
PID 2796 wrote to memory of 1808	2796	services.exe	98
PID 2796 wrote to memory of 1808	2796	services.exe	98
PID 2796 wrote to memory of 1808	2796	services.exe	98
PID 1900 wrote to memory of 624	1900	NET.exe	102
PID 1900 wrote to memory of 624	1900	NET.exe	102
PID 1900 wrote to memory of 624	1900	NET.exe	102
PID 1808 wrote to memory of 4968	1808	NET.exe	101
PID 1808 wrote to memory of 4968	1808	NET.exe	101
PID 1808 wrote to memory of 4968	1808	NET.exe	101

C:\Users\Admin\AppData\Local\Temp\1a365b3dd9a3b049814b3e4ad813c4d8.exe
"C:\Users\Admin\AppData\Local\Temp\1a365b3dd9a3b049814b3e4ad813c4d8.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Modifies Installed Components in the registry
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Windows\SysWOW64\fservice.exe
  C:\Windows\system32\fservice.exe
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4852
- - C:\Windows\services.exe
    C:\Windows\services.exe -XP
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Modifies Installed Components in the registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Modifies WinLogon
    - Drops file in System32 directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2796
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1900
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        
        PID:624
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1808
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        
        PID:4968

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\fservice.exe

Filesize
1.6MB

MD5
1a365b3dd9a3b049814b3e4ad813c4d8

SHA1
4eed488cb6e8d66dbffd3eb6481e91de9830025c

SHA256
3311fbb32acf6d00f0998e557f0a6ef7c1586232586a9069601db9ad72e7d59f

SHA512
63d655bdda4fe599b1d24b35b448039db872e323caff112203b35614068cd2f77aeac16cadfbb1cfa1ad221c270434bcd39f2608e59ec4b1241099f1ad8c4f67

Download Submit
C:\Windows\SysWOW64\reginv.dll

Filesize
36KB

MD5
d4a3f90e159ffbcbc4f9740de4b7f171

SHA1
0542f5d1e2c23dca8d90766b3a8537dc3880e5c9

SHA256
2200dd5f83d2fb8c5d3994206a4fa9ff34b4cbfe56ed39a9a03c954cf45d8f77

SHA512
5493beb50b5f7d8ec52f32718d01696916ae173456005d0c1294ce695161ce5004aff58ee3892bf5db0f9b23720146a6d3ae8ffbcbbd81f84d894fdc8cf75a94

Download Submit
C:\Windows\SysWOW64\winkey.dll

Filesize
24KB

MD5
43e7d9b875c921ba6be38d45540fb9dd

SHA1
f22a73fc0d4aa3ea6c0b8f61d974b028f308acc4

SHA256
f1b2b0abe844e6ba812c7f8709a463a7f6c56fa6ac38d376a0739cc3469f795b

SHA512
2e74e23c0875b69b82319391c392132f28f4eb45aa412805130382498ae48969a06a2b3a7528b626fa7d7ddb6b006f19f0ef8d73cf73cb9a0c0df44a21077622

Download Submit
memory/2796-31-0x00000000041E0000-0x00000000041E1000-memory.dmp

Filesize
4KB

Download
memory/2796-47-0x00000000041E0000-0x00000000041E1000-memory.dmp

Filesize
4KB

Download
memory/2796-53-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-52-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-51-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-50-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-49-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-48-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-27-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-46-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-45-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-35-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/2796-44-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-1-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-2-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-0-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-6-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-15-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-3-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/3500-7-0x0000000002410000-0x0000000002411000-memory.dmp

Filesize
4KB

Download
memory/4852-26-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download
memory/4852-17-0x0000000003F40000-0x0000000003F41000-memory.dmp

Filesize
4KB

Download
memory/4852-16-0x0000000000400000-0x0000000000617000-memory.dmp

Filesize
2.1MB

Download