Malware Analysis Report

2024-10-19 02:58

Sample ID 231231-q2mbxsfack
Target 388aa9feb123c52cad7f72d99f0d16fc
SHA256 1ef3c50af23d5d9d98c27c12eeee05f026d0147e7c5f162c2bc9cf28783b457a
Tags
bazarloader dropper loader persistence
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

1ef3c50af23d5d9d98c27c12eeee05f026d0147e7c5f162c2bc9cf28783b457a

Threat Level: Known bad

The file 388aa9feb123c52cad7f72d99f0d16fc was found to be: Known bad.

Malicious Activity Summary

bazarloader dropper loader persistence

Bazar Loader

Bazar/Team9 Loader payload

Adds Run key to start application

Unsigned PE

Modifies registry key

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: CmdExeWriteProcessMemorySpam

Suspicious use of WriteProcessMemory

Runs ping.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-31 13:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-31 13:45

Reported

2024-01-05 09:59

Platform

win7-20231215-en

Max time kernel

143s

Max time network

137s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll

Signatures

Bazar Loader

loader dropper bazarloader

Bazar/Team9 Loader payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
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Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious behavior: CmdExeWriteProcessMemorySpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1684 wrote to memory of 2576 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1684 wrote to memory of 2576 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1684 wrote to memory of 2576 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 2576 wrote to memory of 2684 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2576 wrote to memory of 2684 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2576 wrote to memory of 2684 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 2576 wrote to memory of 1952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2576 wrote to memory of 1952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2576 wrote to memory of 1952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2576 wrote to memory of 1952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 2576 wrote to memory of 1952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll

C:\Windows\system32\cmd.exe

cmd /c ping 127.0.0.1 -n 8 & "C:\Windows\system32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll" mscp ahis & exit

C:\Windows\system32\PING.EXE

ping 127.0.0.1 -n 8

C:\Windows\system32\regsvr32.exe

"C:\Windows\system32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll" mscp ahis

Network

N/A

Files

memory/1684-0-0x0000000001E60000-0x0000000001EC4000-memory.dmp

memory/1684-1-0x000007FEF6130000-0x000007FEF62D2000-memory.dmp

memory/1684-6-0x000007FEF6130000-0x000007FEF62D2000-memory.dmp

memory/1684-7-0x0000000001E60000-0x0000000001EC4000-memory.dmp

memory/1952-8-0x0000000001E80000-0x0000000001EE4000-memory.dmp

memory/1952-9-0x000007FEF5F80000-0x000007FEF6122000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-31 13:45

Reported

2024-01-05 10:04

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

150s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll

Signatures

Bazar Loader

loader dropper bazarloader

Bazar/Team9 Loader 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
N/A N/A N/A N/A
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N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RealtechUpdate = "\"C:\\Windows\\system32\\regsvr32.exe\" /s \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Damp\\kgurjdi.exe\" mscp arih" C:\Windows\system32\reg.exe N/A

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\system32\reg.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2732 wrote to memory of 1416 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 2732 wrote to memory of 1416 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1416 wrote to memory of 2748 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 1416 wrote to memory of 2748 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 1416 wrote to memory of 1516 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1416 wrote to memory of 1516 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\regsvr32.exe
PID 1516 wrote to memory of 2388 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1516 wrote to memory of 2388 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1516 wrote to memory of 3800 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1516 wrote to memory of 3800 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1516 wrote to memory of 3720 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 1516 wrote to memory of 3720 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\cmd.exe
PID 3720 wrote to memory of 3136 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 3720 wrote to memory of 3136 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 3800 wrote to memory of 2632 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3800 wrote to memory of 2632 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll

C:\Windows\system32\cmd.exe

cmd /c ping 127.0.0.1 -n 8 & "C:\Windows\system32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll" mscp ahis & exit

C:\Windows\system32\PING.EXE

ping 127.0.0.1 -n 8

C:\Windows\system32\regsvr32.exe

"C:\Windows\system32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\388aa9feb123c52cad7f72d99f0d16fc.dll" mscp ahis

C:\Windows\system32\cmd.exe

cmd.exe /c echo %temp%

C:\Windows\system32\cmd.exe

cmd.exe /c reg.exe add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v RealtechUpdate /t REG_SZ /d "\"C:\Windows\system32\regsvr32.exe\" /s \"C:\Users\Admin\AppData\Local\Temp\Damp\kgurjdi.exe\" mscp arih"

C:\Windows\system32\cmd.exe

cmd /c ping 127.0.0.1 -n 8 & "C:\Windows\system32\regsvr32.exe" /s "C:\Users\Admin\AppData\Local\Temp\Damp\kgurjdi.exe" mscp arih & exit

C:\Windows\system32\reg.exe

reg.exe add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v RealtechUpdate /t REG_SZ /d "\"C:\Windows\system32\regsvr32.exe\" /s \"C:\Users\Admin\AppData\Local\Temp\Damp\kgurjdi.exe\" mscp arih"

C:\Windows\system32\PING.EXE

ping 127.0.0.1 -n 8

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 22.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 167.109.18.2.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 105.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 113.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 57.110.18.2.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.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 204.79.197.200:443 tse1.mm.bing.net tcp
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 udp
FR 2.18.110.57:80 tcp
US 8.8.8.8:53 udp
US 20.231.121.79:80 tcp

Files

memory/2732-0-0x00000000282C0000-0x0000000028324000-memory.dmp

memory/2732-1-0x00007FFA9BEA0000-0x00007FFA9C042000-memory.dmp

memory/2732-7-0x00007FFA9BEA0000-0x00007FFA9C042000-memory.dmp

memory/2732-8-0x00000000282C0000-0x0000000028324000-memory.dmp

memory/1516-9-0x00000000282D0000-0x0000000028334000-memory.dmp

memory/1516-10-0x00007FFA9BEA0000-0x00007FFA9C042000-memory.dmp

memory/1516-18-0x00007FFA9BEA0000-0x00007FFA9C042000-memory.dmp

memory/1516-19-0x00000000282D0000-0x0000000028334000-memory.dmp