Malware Analysis Report

2024-10-16 03:31

Sample ID 240926-lvz7zstbnc
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: 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

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

Suspicious use of AdjustPrivilegeToken

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-26 09:51

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-26 09:51

Reported

2024-09-26 09:54

Platform

win7-20240903-en

Max time kernel

140s

Max time network

121s

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
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\AutoConvertTo C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\AutoConvertTo\ = "{64818D11-4F9B-11CF-86EA-00AA00B929E8}" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\Insertable 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}\ProgID\ = "PowerPoint.Slide.4" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TreatAs C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TreatAs\ = "{64818D11-4F9B-11CF-86EA-00AA00B929E8}" 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

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 1088 -s 668

Network

N/A

Files

memory/1088-0-0x0000000002860000-0x0000000002A60000-memory.dmp

memory/1088-7-0x0000000010000000-0x0000000010379000-memory.dmp

memory/1088-9-0x0000000010000000-0x0000000010379000-memory.dmp

memory/1088-10-0x0000000010000000-0x0000000010379000-memory.dmp

memory/1088-11-0x0000000002860000-0x0000000002A60000-memory.dmp

memory/1088-12-0x00000000001D0000-0x00000000001DB000-memory.dmp

memory/1088-13-0x00000000001D0000-0x00000000001DB000-memory.dmp

memory/1088-15-0x00000000001D0000-0x00000000001DB000-memory.dmp

memory/1088-14-0x0000000010000000-0x0000000010379000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-26 09:51

Reported

2024-09-26 09:54

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

100s

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
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\ = "C:\\Windows\\SysWOW64\\MSDvbNP.ax" 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} C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ = "Microsoft ATSC Network Provider" 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 1524 wrote to memory of 648 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1524 wrote to memory of 648 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1524 wrote to memory of 648 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 648 -ip 648

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 648 -s 1116

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/648-0-0x0000000002C40000-0x0000000002E40000-memory.dmp

memory/648-7-0x0000000010000000-0x0000000010379000-memory.dmp

memory/648-10-0x0000000010000000-0x0000000010379000-memory.dmp

memory/648-9-0x0000000010000000-0x0000000010379000-memory.dmp

memory/648-11-0x0000000002C40000-0x0000000002E40000-memory.dmp

memory/648-13-0x0000000002BE0000-0x0000000002BEB000-memory.dmp

memory/648-12-0x0000000002BE0000-0x0000000002BEB000-memory.dmp

memory/648-14-0x0000000002C40000-0x0000000002E40000-memory.dmp

memory/648-15-0x0000000010000000-0x0000000010379000-memory.dmp

memory/648-16-0x0000000002BE0000-0x0000000002BEB000-memory.dmp