Malware Analysis Report

2024-10-16 03:31

Sample ID 240926-rvlmgsvfkg
Target b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77
SHA256 b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77
Tags
banload blackmoon banker discovery downloader dropper evasion trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77

Threat Level: Known bad

The file b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77 was found to be: Known bad.

Malicious Activity Summary

banload blackmoon banker discovery downloader dropper evasion trojan upx

Banload

Blackmoon, KrBanker

Detect Blackmoon payload

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Checks BIOS information in registry

UPX packed file

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Modifies registry class

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-26 14:30

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-26 14:30

Reported

2024-09-26 14:33

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

Signatures

Banload

trojan dropper downloader banload

Blackmoon, KrBanker

trojan banker blackmoon

Detect Blackmoon payload

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

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate C:\Windows\SysWOW64\rundll32.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
N/A N/A N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ = "Microsoft Windows Remote Shell Host" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\AppId = "{3e5ca495-8d6a-4d1f-ad99-177b426c8b8e}" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32 C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32\ = "%systemroot%\\SysWow64\\WinrsHost.exe" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32\ServerExecutable = "%systemroot%\\SysWow64\\WinrsHost.exe" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048} C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: 33 N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2996 wrote to memory of 2824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2996 wrote to memory of 2824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2996 wrote to memory of 2824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2824 -ip 2824

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2824 -s 1116

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 99.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/2824-0-0x0000000002B70000-0x0000000002D70000-memory.dmp

memory/2824-7-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2824-9-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2824-10-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2824-11-0x0000000002B70000-0x0000000002D70000-memory.dmp

memory/2824-12-0x0000000002AB0000-0x0000000002ABB000-memory.dmp

memory/2824-13-0x0000000002AB0000-0x0000000002ABB000-memory.dmp

memory/2824-14-0x0000000002B70000-0x0000000002D70000-memory.dmp

memory/2824-15-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2824-16-0x0000000002AB0000-0x0000000002ABB000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-26 14:30

Reported

2024-09-26 14:33

Platform

win7-20240704-en

Max time kernel

141s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

Signatures

Banload

trojan dropper downloader banload

Blackmoon, KrBanker

trojan banker blackmoon

Detect Blackmoon payload

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

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Windows\SysWOW64\rundll32.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate C:\Windows\SysWOW64\rundll32.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

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ProgID\ = "SAPI.SpLexicon.1" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TypeLib C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\Version C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\VersionIndependentProgID\ = "SAPI.SpLexicon" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ = "SpLexicon Class" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32 C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32\ThreadingModel = "Both" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ProgID C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TypeLib\ = "{C866CA3A-32F7-11D2-9602-00C04F8EE628}" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\Version\ = "5.4" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\VersionIndependentProgID C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048} C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32\ = "%SystemRoot%\\SysWow64\\Speech\\Common\\sapi.dll" C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: 33 N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 668

Network

N/A

Files

memory/2764-0-0x0000000002710000-0x0000000002910000-memory.dmp

memory/2764-7-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2764-10-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2764-9-0x0000000010000000-0x0000000010379000-memory.dmp

memory/2764-11-0x0000000002710000-0x0000000002910000-memory.dmp

memory/2764-13-0x0000000000270000-0x000000000027B000-memory.dmp

memory/2764-12-0x0000000000270000-0x000000000027B000-memory.dmp

memory/2764-14-0x0000000010000000-0x0000000010379000-memory.dmp