Malware Analysis Report

2025-08-10 19:45

Sample ID 240131-lp1assbbfl
Target 84163f55a98e68a7e2cb11fe45ed507a
SHA256 2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436
Tags
modiloader evasion persistence trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436

Threat Level: Known bad

The file 84163f55a98e68a7e2cb11fe45ed507a was found to be: Known bad.

Malicious Activity Summary

modiloader evasion persistence trojan upx

UAC bypass

ModiLoader, DBatLoader

ModiLoader Second Stage

Modiloader family

ModiLoader Second Stage

Executes dropped EXE

UPX packed file

Loads dropped DLL

Deletes itself

Checks computer location settings

Checks whether UAC is enabled

Adds Run key to start application

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

System policy modification

Suspicious use of SetWindowsHookEx

Uses Volume Shadow Copy service COM API

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-31 09:43

Signatures

ModiLoader Second Stage

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

Modiloader family

modiloader

UPX packed file

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

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-31 09:43

Reported

2024-01-31 09:45

Platform

win10v2004-20231222-en

Max time kernel

148s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe N/A

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

Loads dropped DLL

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

UPX packed file

upx
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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\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\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.exe

"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
BR 187.89.97.95:15963 tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp

Files

memory/3056-0-0x0000000000400000-0x0000000000450000-memory.dmp

memory/3056-1-0x00000000020D0000-0x00000000020D1000-memory.dmp

C:\Windows\mstwain32.exe

MD5 84163f55a98e68a7e2cb11fe45ed507a
SHA1 b35d3f9852ebde4c7d030a9853121e2e930a7a42
SHA256 2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436
SHA512 b22c25ecd03d0c861016bfe75afcfbe46b43e5044d00bb65c384a321335a9ae353998ed3ad965dc1fe88d3324252723fce3b46892c71bb52e5910b597439cb13

memory/3056-11-0x0000000000400000-0x0000000000450000-memory.dmp

C:\Windows\ntdtcstp.dll

MD5 67587e25a971a141628d7f07bd40ffa0
SHA1 76fcd014539a3bb247cc0b761225f68bd6055f6b
SHA256 e6829866322d68d5c5b78e3d48dcec70a41cdc42c6f357a44fd329f74a8b4378
SHA512 6e6de7aa02c48f8b96b06e5f1160fbc5c95312320636e138cc997ef3362a61bc50ec03db1f06292eb964cd71915ddb2ec2eb741432c7da44215a4acbb576a350

memory/2304-19-0x0000000000920000-0x0000000000921000-memory.dmp

C:\Windows\cmsetac.dll

MD5 88f1291d20aa04766107260ca801b855
SHA1 879f99133249edc0e5d51ce13abae6e63fa75266
SHA256 e6c331208fd2946a2a073023724ea68b12b0048953413f320b3769372058a8fe
SHA512 85fa42f3c8f75df353c9541b7bbb0f94ba160248d347f3ecca61b7fa227b43a273f2459164b6dfd04147b74fe4af95c5fb9f546dc4c264d5039c91ef2820db37

memory/2304-23-0x00000000028E0000-0x00000000028EE000-memory.dmp

memory/2304-26-0x0000000002790000-0x0000000002791000-memory.dmp

memory/2304-27-0x0000000000980000-0x0000000000988000-memory.dmp

memory/2304-28-0x00000000028E0000-0x00000000028EE000-memory.dmp

memory/2304-29-0x0000000000400000-0x0000000000450000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-31 09:43

Reported

2024-01-31 09:45

Platform

win7-20231215-en

Max time kernel

144s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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

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

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

UPX packed file

upx
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
N/A N/A N/A N/A
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-1-5-21-928733405-3780110381-2966456290-1000\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\84163f55a98e68a7e2cb11fe45ed507a.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 created C:\Windows\mstwain32.exe C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe N/A
File opened for modification C:\Windows\mstwain32.exe C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.exe

"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.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\84163f55a98e68a7e2cb11fe45ed507a.exe"

Network

Country Destination Domain Proto
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp
BR 187.89.97.95:15963 tcp

Files

memory/3032-0-0x0000000000400000-0x0000000000450000-memory.dmp

memory/3032-1-0x0000000000280000-0x0000000000281000-memory.dmp

C:\Windows\mstwain32.exe

MD5 84163f55a98e68a7e2cb11fe45ed507a
SHA1 b35d3f9852ebde4c7d030a9853121e2e930a7a42
SHA256 2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436
SHA512 b22c25ecd03d0c861016bfe75afcfbe46b43e5044d00bb65c384a321335a9ae353998ed3ad965dc1fe88d3324252723fce3b46892c71bb52e5910b597439cb13

memory/3032-10-0x0000000000400000-0x0000000000450000-memory.dmp

memory/3032-8-0x0000000002500000-0x0000000002510000-memory.dmp

memory/688-14-0x0000000000400000-0x0000000000450000-memory.dmp

memory/3032-13-0x0000000002500000-0x000000000250D000-memory.dmp

memory/3032-12-0x0000000003340000-0x0000000003390000-memory.dmp

memory/688-18-0x00000000005E0000-0x00000000005E1000-memory.dmp

memory/688-19-0x0000000002410000-0x000000000241E000-memory.dmp

memory/688-21-0x0000000075F70000-0x0000000076060000-memory.dmp

memory/688-22-0x0000000074BD0000-0x0000000074BE4000-memory.dmp

memory/688-23-0x0000000002400000-0x0000000002401000-memory.dmp

memory/688-24-0x0000000000400000-0x0000000000450000-memory.dmp

memory/688-25-0x0000000075F70000-0x0000000076060000-memory.dmp