Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-ferm1sxkw7
Target c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78
SHA256 c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78
Tags
blihanstealer discovery persistence stealer 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

c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78

Threat Level: Known bad

The file c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78 was found to be: Known bad.

Malicious Activity Summary

blihanstealer discovery persistence stealer trojan

Blihanstealer family

BlihanStealer

Deletes itself

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-27 04:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 04:47

Reported

2025-02-27 04:50

Platform

win7-20240903-en

Max time kernel

149s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe"

Signatures

BlihanStealer

trojan stealer blihanstealer

Blihanstealer family

blihanstealer

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe

"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2108-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2108-7-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 ff35d701f80bc242affe27cba2cb5880
SHA1 56a779e89adc2615219eaa1fd9d55ceddf40b559
SHA256 12557ccf87c1a282c76fbc1f21dbf1971cbdfc58c91d24f9fdb487f60f54b2e9
SHA512 58fbe599a4ecd333a7595e2b1daace6530301d37313a3d2e82823527baaa8ea95a397f9a17cb91d7123f45c70c7049f5e6ead0bbeeb92fb22a0bf9cbe25557e6

memory/1688-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1688-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 04:47

Reported

2025-02-27 04:50

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe"

Signatures

BlihanStealer

trojan stealer blihanstealer

Blihanstealer family

blihanstealer

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\microsofthelp.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe

"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/840-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 ff35d701f80bc242affe27cba2cb5880
SHA1 56a779e89adc2615219eaa1fd9d55ceddf40b559
SHA256 12557ccf87c1a282c76fbc1f21dbf1971cbdfc58c91d24f9fdb487f60f54b2e9
SHA512 58fbe599a4ecd333a7595e2b1daace6530301d37313a3d2e82823527baaa8ea95a397f9a17cb91d7123f45c70c7049f5e6ead0bbeeb92fb22a0bf9cbe25557e6

memory/840-5-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2564-7-0x0000000000400000-0x000000000040E000-memory.dmp