Malware Analysis Report

2025-03-15 03:58

Sample ID 240518-2m6ykabg9z
Target chrosha.exe
SHA256 d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876
Tags
amadey 090bb7 evasion 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

d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876

Threat Level: Known bad

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

Malicious Activity Summary

amadey 090bb7 evasion trojan

Amadey

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Executes dropped EXE

Checks BIOS information in registry

Identifies Wine through registry keys

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-18 22:42

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-18 22:42

Reported

2024-05-18 22:45

Platform

win7-20240508-en

Max time kernel

121s

Max time network

121s

Command Line

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

Signatures

Amadey

trojan amadey

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\chrosha.job C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of FindShellTrayWindow

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

Processes

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

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

Network

N/A

Files

memory/308-0-0x0000000001340000-0x00000000017F3000-memory.dmp

memory/308-1-0x0000000077B20000-0x0000000077B22000-memory.dmp

memory/308-2-0x0000000001341000-0x000000000136F000-memory.dmp

memory/308-3-0x0000000001340000-0x00000000017F3000-memory.dmp

memory/308-5-0x0000000001340000-0x00000000017F3000-memory.dmp

memory/308-10-0x0000000001340000-0x00000000017F3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-18 22:42

Reported

2024-05-18 22:45

Platform

win10v2004-20240508-en

Max time kernel

145s

Max time network

136s

Command Line

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

Signatures

Amadey

trojan amadey

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\chrosha.job C:\Users\Admin\AppData\Local\Temp\chrosha.exe N/A

Enumerates physical storage devices

Processes

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

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

C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe

C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp
US 204.79.197.237:443 g.bing.com tcp
BE 2.17.107.98:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 98.107.17.2.in-addr.arpa udp
BE 2.17.107.98:443 www.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
RU 193.233.132.167:80 tcp
RU 193.233.132.167:80 tcp
RU 193.233.132.167:80 tcp
RU 193.233.132.167:80 tcp
US 8.8.8.8:53 31.243.111.52.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
RU 193.233.132.167:80 tcp

Files

memory/1488-0-0x0000000000D90000-0x0000000001243000-memory.dmp

memory/1488-1-0x0000000077CC4000-0x0000000077CC6000-memory.dmp

memory/1488-2-0x0000000000D91000-0x0000000000DBF000-memory.dmp

memory/1488-3-0x0000000000D90000-0x0000000001243000-memory.dmp

memory/1488-5-0x0000000000D90000-0x0000000001243000-memory.dmp

memory/1488-10-0x0000000000D90000-0x0000000001243000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe

MD5 73d73c48859fc7aa4fd78d9a57f859d6
SHA1 c1f71ea0692d97c653ff5a5ecbc03fd02173fe05
SHA256 d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876
SHA512 f0634be539582016c03e83f3ca58d613fc16abcc0a9c320321f455234a8f2dc1c199fc52187abac5e4cbbe7b7907afdaa89813f50cbecd611f7e870ee7f8e979

memory/3244-13-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-14-0x0000000000331000-0x000000000035F000-memory.dmp

memory/3244-15-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-16-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-17-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-18-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-19-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-20-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-21-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-22-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-23-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-24-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-25-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-26-0x0000000000330000-0x00000000007E3000-memory.dmp

memory/3244-27-0x0000000000330000-0x00000000007E3000-memory.dmp