Malware Analysis Report

2024-11-13 16:48

Sample ID 200810-prt85hlana
Target ken.exe
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
Tags
buer loader persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5

Threat Level: Known bad

The file ken.exe was found to be: Known bad.

Malicious Activity Summary

buer loader persistence

Buer

Modifies WinLogon for persistence

Buer Loader

Executes dropped EXE

Loads dropped DLL

Suspicious use of SetThreadContext

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2020-08-10 11:39

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-08-10 11:39

Reported

2020-08-10 11:42

Platform

win7

Max time kernel

127s

Max time network

70s

Command Line

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

Signatures

Buer

loader buer

Buer Loader

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\442665b0da518c45c03d\gennt.exe N/A

Loads dropped DLL

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 900 set thread context of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 900 wrote to memory of 1864 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 1864 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\442665b0da518c45c03d\gennt.exe
PID 1864 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\442665b0da518c45c03d\gennt.exe
PID 1864 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\442665b0da518c45c03d\gennt.exe
PID 1864 wrote to memory of 1536 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\442665b0da518c45c03d\gennt.exe

Processes

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

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

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

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

C:\ProgramData\442665b0da518c45c03d\gennt.exe

C:\ProgramData\442665b0da518c45c03d\gennt.exe "C:\Users\Admin\AppData\Local\Temp\ken.exe" ensgJJ

Network

N/A

Files

memory/1864-0-0x0000000040000000-0x000000004000C000-memory.dmp

memory/1864-1-0x0000000040003030-mapping.dmp

memory/1864-2-0x0000000040000000-0x000000004000C000-memory.dmp

\ProgramData\442665b0da518c45c03d\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

\ProgramData\442665b0da518c45c03d\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

memory/1536-5-0x0000000000000000-mapping.dmp

C:\ProgramData\442665b0da518c45c03d\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

C:\ProgramData\442665b0da518c45c03d\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

Analysis: behavioral2

Detonation Overview

Submitted

2020-08-10 11:39

Reported

2020-08-10 11:42

Platform

win10

Max time kernel

141s

Max time network

117s

Command Line

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

Signatures

Buer

loader buer

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:\\ProgramData\\92c31ebae0ab671de163\\gennt.exe\"" C:\ProgramData\92c31ebae0ab671de163\gennt.exe N/A

Buer Loader

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
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe N/A
N/A N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3888 set thread context of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3708 set thread context of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ken.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3888 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\Users\Admin\AppData\Local\Temp\ken.exe
PID 3820 wrote to memory of 3708 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3820 wrote to memory of 3708 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3820 wrote to memory of 3708 N/A C:\Users\Admin\AppData\Local\Temp\ken.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 3708 wrote to memory of 568 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\ProgramData\92c31ebae0ab671de163\gennt.exe
PID 568 wrote to memory of 836 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\Windows\SysWOW64\secinit.exe
PID 568 wrote to memory of 836 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\Windows\SysWOW64\secinit.exe
PID 568 wrote to memory of 836 N/A C:\ProgramData\92c31ebae0ab671de163\gennt.exe C:\Windows\SysWOW64\secinit.exe

Processes

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

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

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

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

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

C:\ProgramData\92c31ebae0ab671de163\gennt.exe "C:\Users\Admin\AppData\Local\Temp\ken.exe" ensgJJ

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

C:\Windows\SysWOW64\secinit.exe

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

Network

N/A

Files

memory/3820-0-0x0000000040000000-0x000000004000C000-memory.dmp

memory/3820-1-0x0000000040003030-mapping.dmp

memory/3820-2-0x0000000040000000-0x000000004000C000-memory.dmp

memory/3708-3-0x0000000000000000-mapping.dmp

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430

memory/568-7-0x0000000040003030-mapping.dmp

C:\ProgramData\92c31ebae0ab671de163\gennt.exe

MD5 14e0e1a26f0e29171486cb2feb89fc3e
SHA1 cb3f2b4e3f5060088c6158f4b6c5b6d627f68a20
SHA256 c69a9adf7333a5098d91be899802e6f0e77de4d1be8d11363dccd0fc830311c5
SHA512 12ea8bb6bdcc809a2ba46a33cb69e4535af3a5ba9750179cf1a8f050ae1e3f0ea544000d504a2318c8d22e297eaa466f7977c593f3d00ec2c24276e66abd8430