Malware Analysis Report

2025-08-05 14:32

Sample ID 240203-xq8jcaaedr
Target 8d1b98911e753283e86aa1d84a2826d8
SHA256 46b5e0aa12026e4615bbbb5d4d243a5d7445de044a649bc94e7581a1d7b04e61
Tags
modiloader evasion persistence themida 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

46b5e0aa12026e4615bbbb5d4d243a5d7445de044a649bc94e7581a1d7b04e61

Threat Level: Known bad

The file 8d1b98911e753283e86aa1d84a2826d8 was found to be: Known bad.

Malicious Activity Summary

modiloader evasion persistence themida trojan

UAC bypass

ModiLoader, DBatLoader

ModiLoader Second Stage

Deletes itself

Themida packer

Executes dropped EXE

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Uses Volume Shadow Copy service COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

System policy modification

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-03 19:04

Signatures

Themida packer

themida
Description Indicator Process Target
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Unsigned PE

Description Indicator Process Target
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Analysis: behavioral1

Detonation Overview

Submitted

2024-02-03 19:04

Reported

2024-02-03 19:07

Platform

win7-20231215-en

Max time kernel

145s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe"

Signatures

ModiLoader, DBatLoader

trojan modiloader

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\mstwain32.exe N/A

ModiLoader Second Stage

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Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\mstwain32.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\mstwain32.exe N/A

Themida packer

themida
Description Indicator Process Target
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Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1603059206-2004189698-4139800220-1000\Software\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe" C:\Windows\mstwain32.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe N/A
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\mstwain32.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\mstwain32.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\mstwain32.exe C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe N/A
File created C:\Windows\ntdtcstp.dll C:\Windows\mstwain32.exe N/A
File created C:\Windows\cmsetac.dll C:\Windows\mstwain32.exe N/A
File created C:\Windows\mstwain32.exe C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe N/A
N/A N/A C:\Windows\mstwain32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\mstwain32.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\mstwain32.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\mstwain32.exe N/A
N/A N/A C:\Windows\mstwain32.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\mstwain32.exe N/A

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe

"C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\mstwain32.exe

"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 nenibolado.no-ip.org udp

Files

memory/2196-0-0x0000000000270000-0x0000000000271000-memory.dmp

memory/2196-1-0x0000000001EC0000-0x0000000001FA4000-memory.dmp

memory/2196-2-0x0000000000400000-0x000000000069E000-memory.dmp

memory/2196-3-0x0000000004320000-0x0000000004321000-memory.dmp

memory/2196-19-0x0000000004420000-0x0000000004421000-memory.dmp

memory/2196-18-0x00000000043C0000-0x00000000043C1000-memory.dmp

memory/2196-17-0x0000000004350000-0x0000000004351000-memory.dmp

memory/2196-16-0x0000000004360000-0x0000000004361000-memory.dmp

memory/2196-15-0x0000000004440000-0x0000000004441000-memory.dmp

memory/2196-14-0x0000000004330000-0x0000000004331000-memory.dmp

memory/2196-13-0x0000000004370000-0x0000000004371000-memory.dmp

memory/2196-12-0x00000000043F0000-0x00000000043F1000-memory.dmp

memory/2196-11-0x00000000043D0000-0x00000000043D1000-memory.dmp

memory/2196-10-0x0000000004480000-0x0000000004481000-memory.dmp

memory/2196-9-0x00000000043B0000-0x00000000043B1000-memory.dmp

memory/2196-8-0x00000000043A0000-0x00000000043A1000-memory.dmp

memory/2196-7-0x0000000004490000-0x0000000004491000-memory.dmp

memory/2196-6-0x0000000004380000-0x0000000004381000-memory.dmp

memory/2196-5-0x00000000041B0000-0x00000000041B1000-memory.dmp

memory/2196-4-0x0000000004340000-0x0000000004341000-memory.dmp

memory/2196-20-0x00000000044B0000-0x00000000044B1000-memory.dmp

memory/2196-21-0x0000000004110000-0x0000000004111000-memory.dmp

memory/2196-22-0x0000000000400000-0x000000000069E000-memory.dmp

memory/2196-25-0x0000000004430000-0x0000000004431000-memory.dmp

C:\Windows\mstwain32.exe

MD5 8d1b98911e753283e86aa1d84a2826d8
SHA1 9229784e22dbe0e3064c41a0e1f886b915f6168f
SHA256 46b5e0aa12026e4615bbbb5d4d243a5d7445de044a649bc94e7581a1d7b04e61
SHA512 5c890395f5676801749a5810aca8237f988be5996ed6f742d085a12311b1e7964e5e9f211ae5fcb84c80e5cf08a5ad34006107c45f254875757a2aacad11343b

memory/2196-33-0x0000000000400000-0x000000000069E000-memory.dmp

memory/2196-32-0x0000000000270000-0x0000000000271000-memory.dmp

memory/2196-34-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-35-0x0000000000840000-0x0000000000841000-memory.dmp

memory/1656-49-0x0000000004400000-0x0000000004401000-memory.dmp

memory/1656-48-0x0000000004460000-0x0000000004461000-memory.dmp

memory/1656-47-0x00000000043B0000-0x00000000043B2000-memory.dmp

memory/1656-46-0x00000000043A0000-0x00000000043A1000-memory.dmp

memory/1656-45-0x0000000004470000-0x0000000004471000-memory.dmp

memory/1656-51-0x0000000004960000-0x000000000496E000-memory.dmp

memory/1656-50-0x00000000043C0000-0x00000000043C1000-memory.dmp

memory/1656-44-0x00000000044C0000-0x00000000044C1000-memory.dmp

memory/1656-43-0x0000000004380000-0x0000000004381000-memory.dmp

memory/1656-42-0x00000000041B0000-0x00000000041B1000-memory.dmp

memory/1656-41-0x0000000004200000-0x0000000004201000-memory.dmp

memory/1656-64-0x00000000044B0000-0x00000000044B1000-memory.dmp

memory/1656-67-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

memory/1656-66-0x00000000041F0000-0x00000000041F1000-memory.dmp

memory/1656-65-0x00000000754A0000-0x00000000754B4000-memory.dmp

memory/1656-63-0x0000000004450000-0x0000000004451000-memory.dmp

memory/1656-62-0x0000000004430000-0x0000000004431000-memory.dmp

memory/1656-61-0x0000000004490000-0x0000000004491000-memory.dmp

memory/1656-60-0x0000000004410000-0x0000000004411000-memory.dmp

memory/1656-59-0x0000000004210000-0x0000000004211000-memory.dmp

memory/1656-58-0x0000000004220000-0x0000000004221000-memory.dmp

memory/1656-57-0x0000000004420000-0x0000000004421000-memory.dmp

memory/1656-56-0x00000000044D0000-0x00000000044D1000-memory.dmp

memory/1656-55-0x00000000043E0000-0x00000000043E1000-memory.dmp

memory/1656-54-0x0000000004370000-0x0000000004371000-memory.dmp

memory/1656-53-0x00000000043D0000-0x00000000043D2000-memory.dmp

memory/1656-40-0x00000000041E0000-0x00000000041E1000-memory.dmp

memory/1656-39-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-68-0x00000000761D0000-0x00000000762C0000-memory.dmp

memory/1656-69-0x0000000004950000-0x0000000004951000-memory.dmp

memory/1656-70-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-71-0x0000000000840000-0x0000000000841000-memory.dmp

memory/1656-72-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-73-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-74-0x00000000761D0000-0x00000000762C0000-memory.dmp

memory/1656-75-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-76-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-78-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-79-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-80-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-81-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-82-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-83-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-84-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-85-0x0000000000400000-0x000000000069E000-memory.dmp

memory/1656-86-0x0000000000400000-0x000000000069E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-03 19:04

Reported

2024-02-03 19:07

Platform

win10v2004-20231215-en

Max time kernel

152s

Max time network

159s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe

"C:\Users\Admin\AppData\Local\Temp\8d1b98911e753283e86aa1d84a2826d8.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 177.113.50.184.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 182.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 183.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.73.50.20.in-addr.arpa udp

Files

memory/3524-1-0x00000000023C0000-0x00000000024A4000-memory.dmp

memory/3524-0-0x0000000000B40000-0x0000000000B41000-memory.dmp