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Analysis
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max time kernel
145s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
18/05/2024, 22:42
Static task
static1
Behavioral task
behavioral1
Sample
chrosha.exe
Resource
win7-20240508-en
General
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Target
chrosha.exe
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Size
1.8MB
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MD5
73d73c48859fc7aa4fd78d9a57f859d6
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SHA1
c1f71ea0692d97c653ff5a5ecbc03fd02173fe05
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SHA256
d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876
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SHA512
f0634be539582016c03e83f3ca58d613fc16abcc0a9c320321f455234a8f2dc1c199fc52187abac5e4cbbe7b7907afdaa89813f50cbecd611f7e870ee7f8e979
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SSDEEP
24576:Snk5YKXHSuRlxqOd8pF2h99TqJWVs/ae2c01R/QTS5I0aQrnnuls5py6sDya:0YNxd7h9hqJ2s/ae10e0aiCKrsu
Malware Config
Extracted
amadey
4.17
090bb7
http://193.233.132.167
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install_dir
4d0ab15804
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install_file
chrosha.exe
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strings_key
1a9519d7b465e1f4880fa09a6162d768
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url_paths
/enigma/index.php
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ chrosha.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ chrosha.exe -
Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion chrosha.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion chrosha.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion chrosha.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion chrosha.exe -
Executes dropped EXE 1 IoCs
pid Process 3244 chrosha.exe -
Identifies Wine through registry keys 2 TTPs 2 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Software\Wine chrosha.exe Key opened \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Software\Wine chrosha.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 1488 chrosha.exe 3244 chrosha.exe -
Drops file in Windows directory 1 IoCs
description ioc Process File created C:\Windows\Tasks\chrosha.job chrosha.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1488 chrosha.exe 1488 chrosha.exe 3244 chrosha.exe 3244 chrosha.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\chrosha.exe"C:\Users\Admin\AppData\Local\Temp\chrosha.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1488
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C:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exeC:\Users\Admin\AppData\Local\Temp\4d0ab15804\chrosha.exe1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:3244
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.8MB
MD573d73c48859fc7aa4fd78d9a57f859d6
SHA1c1f71ea0692d97c653ff5a5ecbc03fd02173fe05
SHA256d46a8fa545385ab42ca58f6175b13f4b9989d88322ab624f646623b4a52a4876
SHA512f0634be539582016c03e83f3ca58d613fc16abcc0a9c320321f455234a8f2dc1c199fc52187abac5e4cbbe7b7907afdaa89813f50cbecd611f7e870ee7f8e979