Malware Analysis Report

2024-07-28 05:22

Sample ID 240603-gkr2eadg8v
Target fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83
SHA256 fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83
Tags
adware persistence stealer upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83

Threat Level: Known bad

The file fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83 was found to be: Known bad.

Malicious Activity Summary

adware persistence stealer upx

Modifies WinLogon for persistence

UPX dump on OEP (original entry point)

Sets service image path in registry

Drops file in Drivers directory

UPX packed file

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

Adds Run key to start application

Installs/modifies Browser Helper Object

Modifies WinLogon

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Winlogon Helper DLL
T1547.004
Browser Extensions
T1176
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Winlogon Helper DLL
T1547.004
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-03 05:52

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-03 05:52

Reported

2024-06-03 05:54

Platform

win7-20240221-en

Max time kernel

141s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe," C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\drivers\spools.exe C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
File opened for modification C:\Windows\SysWOW64\drivers\spools.exe C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

ACProtect 1.3x - 1.4x DLL software

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{18DF081C-E8AD-4283-A596-FA578C2EBDC3} C:\Windows\SysWOW64\reg.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{72853161-30C5-4D22-B7F9-0BBC1D38A37E} C:\Windows\SysWOW64\reg.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{B4F3A835-0E21-4959-BA22-42B3008E02FF} C:\Windows\SysWOW64\reg.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects C:\Windows\SysWOW64\reg.exe N/A

Modifies WinLogon

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ftpdll.dll C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2164 wrote to memory of 2684 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe
PID 2164 wrote to memory of 2684 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe
PID 2164 wrote to memory of 2684 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe
PID 2164 wrote to memory of 2684 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe

"C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe"

C:\Windows\SysWOW64\reg.exe

reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 webbibleschool.org udp
US 8.8.8.8:53 getupdate.org udp

Files

memory/2164-0-0x0000000000400000-0x0000000000411000-memory.dmp

C:\Users\Admin\AppData\Local\cftmon.exe

MD5 d0505efc3608aaef06bb4bf2b57d04ad
SHA1 351613246059bb4a7c21e9be40248a541ae951a5
SHA256 881b61faf2622b98ba66e41895464d27e02238ef13fc7ef19e5299512cdcd585
SHA512 ec5d7bc5af97fde8db08b96994e9d88393faf0f1b3f110de0c5f6cd0e301238849efb797df3bbf7c1e45056bdeb657c8ba618bb3e1a1147bff257d4f7e1481b8

\Windows\SysWOW64\ftpdll.dll

MD5 d807aa04480d1d149f7a4cac22984188
SHA1 ffd5be65fd10017e34c11cecd105ebf4aa6c0cd9
SHA256 eddf092d901afe128322910c3ff41a3f242d33d6b4cdf91ece327076b324ccbb
SHA512 875543583c20ab164f37a4fb2587d234ce0a15d649d22b0d1dae5933f0a7683db170578746ea4458c51fec26e2243c6ec00dc10db8d4289789e50d5800cf863e

memory/2164-11-0x0000000010000000-0x000000001010B000-memory.dmp

memory/2164-14-0x0000000000400000-0x0000000000411000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-03 05:52

Reported

2024-06-03 05:54

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe," C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\drivers\spools.exe C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
File opened for modification C:\Windows\SysWOW64\drivers\spools.exe C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Sets service image path in registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

ACProtect 1.3x - 1.4x DLL software

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\cftmon.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C} C:\Windows\SysWOW64\reg.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA} C:\Windows\SysWOW64\reg.exe N/A
Key deleted \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects C:\Windows\SysWOW64\reg.exe N/A

Modifies WinLogon

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe" C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ftpdll.dll C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4684 wrote to memory of 4188 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe
PID 4684 wrote to memory of 4188 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe
PID 4684 wrote to memory of 4188 N/A C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe C:\Windows\SysWOW64\reg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe

"C:\Users\Admin\AppData\Local\Temp\fd9dc525ad8fa70067716007d38857fc09d2cf4fbbc446d040672cc7930f0d83.exe"

C:\Windows\SysWOW64\reg.exe

reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 23.62.61.129:443 www.bing.com tcp
US 8.8.8.8:53 webbibleschool.org udp
US 8.8.8.8:53 getupdate.org udp
US 8.8.8.8:53 129.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 123.10.44.20.in-addr.arpa udp

Files

memory/4684-0-0x0000000000400000-0x0000000000411000-memory.dmp

C:\Users\Admin\AppData\Local\cftmon.exe

MD5 ae96580c30b885c00f30d38bbdf07db5
SHA1 3176765a0df448bedb6a31f321904a0d4ad2d730
SHA256 b5ff81f5005445f0b4905bedad504bae418b35a9916d2307c9094fa526e7f9d5
SHA512 0fa5ef14257bf3f1f7b01aeeff144ac262b73b89f6c47349dfaa5b4a91376d2cb3704e36cc0e941f0ad259e41542177d57156ef1c853d7fc5d26d69a011c270f

C:\Windows\SysWOW64\ftpdll.dll

MD5 d807aa04480d1d149f7a4cac22984188
SHA1 ffd5be65fd10017e34c11cecd105ebf4aa6c0cd9
SHA256 eddf092d901afe128322910c3ff41a3f242d33d6b4cdf91ece327076b324ccbb
SHA512 875543583c20ab164f37a4fb2587d234ce0a15d649d22b0d1dae5933f0a7683db170578746ea4458c51fec26e2243c6ec00dc10db8d4289789e50d5800cf863e

memory/4684-12-0x0000000010000000-0x000000001010B000-memory.dmp

memory/4684-15-0x0000000000400000-0x0000000000411000-memory.dmp