Analysis Overview
SHA256
d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876
Threat Level: Known bad
The file chrosha.exe was found to be: Known bad.
Malicious Activity Summary
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
Enterprise Matrix V15
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
Signatures
Amadey
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| 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
| 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
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
Signatures
Amadey
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| 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
| 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
Suspicious behavior: EnumeratesProcesses
| 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\chrosha.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe | N/A |
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