Malware Analysis Report

2025-06-16 03:39

Sample ID 240526-kjl1jscf3v
Target 3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930
SHA256 3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930
Tags
blackmoon banker bootkit persistence trojan
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

3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930

Threat Level: Known bad

The file 3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930 was found to be: Known bad.

Malicious Activity Summary

blackmoon banker bootkit persistence trojan

Blackmoon, KrBanker

Detect Blackmoon payload

Blocklisted process makes network request

Writes to the Master Boot Record (MBR)

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-26 08:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-26 08:37

Reported

2024-05-26 08:40

Platform

win7-20240221-en

Max time kernel

119s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

Signatures

Blackmoon, KrBanker

trojan banker blackmoon

Detect Blackmoon payload

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

Blocklisted process makes network request

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification \??\PhysicalDrive0 C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
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\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 cg006.18mu.com udp
CN 103.219.177.122:12345 cg006.18mu.com tcp

Files

memory/2380-0-0x0000000010000000-0x000000001042B000-memory.dmp

memory/2380-1-0x0000000010000000-0x000000001042B000-memory.dmp

memory/2380-2-0x0000000010000000-0x000000001042B000-memory.dmp

memory/2380-3-0x0000000010000000-0x000000001042B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-26 08:37

Reported

2024-05-26 08:40

Platform

win10v2004-20240426-en

Max time kernel

134s

Max time network

139s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

Signatures

Blackmoon, KrBanker

trojan banker blackmoon

Detect Blackmoon payload

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

Blocklisted process makes network request

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

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification \??\PhysicalDrive0 C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2972 wrote to memory of 868 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2972 wrote to memory of 868 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2972 wrote to memory of 868 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\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a141f5df5cd021d394c98a670eb994eea34a9db28ae726b55d4bc3d585b7930.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 cg006.18mu.com udp
CN 103.219.177.122:12345 cg006.18mu.com tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.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

Files

memory/868-0-0x0000000010000000-0x000000001042B000-memory.dmp

memory/868-1-0x0000000010000000-0x000000001042B000-memory.dmp