Malware Analysis Report

2024-07-28 11:06

Sample ID 240628-dy66ps1fnr
Target 55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5
SHA256 55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5
Tags
oss_ak bootkit persistence upx
score
9/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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
9/10

SHA256

55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5

Threat Level: Likely malicious

The file 55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5 was found to be: Likely malicious.

Malicious Activity Summary

oss_ak bootkit persistence upx

detect oss ak

UPX packed file

Writes to the Master Boot Record (MBR)

Unsigned PE

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Pre-OS Boot
T1542
Bootkit
T1542.003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Pre-OS Boot
T1542
Bootkit
T1542.003
Credential Access
TA0006
Discovery
TA0007
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-28 03:26

Signatures

detect oss ak

oss_ak
Description Indicator Process Target
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Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-28 03:26

Reported

2024-06-28 03:28

Platform

win7-20240221-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe"

Signatures

detect oss ak

oss_ak
Description Indicator Process Target
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UPX packed file

upx
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Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe

"C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe"

Network

Country Destination Domain Proto
CN 122.51.207.195:9010 tcp
CN 122.51.207.195:9010 tcp

Files

memory/2020-0-0x00000000006E0000-0x00000000006E1000-memory.dmp

memory/2020-5-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-15-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-23-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-33-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-44-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-45-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-43-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-41-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-39-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-47-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-37-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-35-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-31-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-29-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-27-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-25-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-21-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-19-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-49-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-48-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-17-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-50-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-13-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-11-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-9-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-7-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-3-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-2-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-1-0x0000000000E80000-0x0000000000EBE000-memory.dmp

memory/2020-51-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2020-52-0x0000000000400000-0x0000000000CED000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-28 03:26

Reported

2024-06-28 03:28

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe"

Signatures

detect oss ak

oss_ak
Description Indicator Process Target
N/A N/A N/A N/A
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UPX packed file

upx
Description Indicator Process Target
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Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe

"C:\Users\Admin\AppData\Local\Temp\55f38ec15f3dec84b429caa304d5faafcaedb9cd7cb4d4f260d09322961b20e5.exe"

Network

Country Destination Domain Proto
CN 122.51.207.195:9010 tcp
CN 122.51.207.195:9010 tcp

Files

memory/2544-0-0x00000000006E0000-0x00000000006E1000-memory.dmp

memory/2544-15-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-25-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-33-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-43-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-45-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2544-46-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2544-41-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-39-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-35-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-37-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-31-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-29-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-27-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-23-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-21-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-19-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-17-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-13-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-9-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-5-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-3-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-1-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-11-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-7-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-2-0x0000000002C80000-0x0000000002CBE000-memory.dmp

memory/2544-47-0x0000000000400000-0x0000000000CED000-memory.dmp

memory/2544-48-0x0000000000400000-0x0000000000CED000-memory.dmp