Analysis
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max time kernel
144s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 00:56
Static task
static1
Behavioral task
behavioral1
Sample
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe
Resource
win10v2004-20240426-en
General
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Target
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe
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Size
1.8MB
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MD5
fe3346ec5bed65ea2f056fb8898a2f5c
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SHA1
6049004590734a9ba8124d9b7779a0d8ccd0ff2b
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SHA256
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483
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SHA512
dbed2b9a6de8a1646e167ef74db323e458cf3a7b1518cbf412f66c04db470d232018ce600f5ee0a56c6f47975e2435061a24b564814da190e5c3f2ff434991c1
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SSDEEP
49152:+aBIARUgsrH0gdAzgjWKKqv6eGN5US9FnGjV/5rX:9B3UgsDTmEdKqvbGNJ9dCx5r
Malware Config
Extracted
amadey
4.17
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
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exechrosha.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ chrosha.exe -
Blocklisted process makes network request 2 IoCs
Processes:
rundll32.exerundll32.exeflow pid process 39 868 rundll32.exe 40 5048 rundll32.exe -
Downloads MZ/PE file
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Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exechrosha.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion chrosha.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion chrosha.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
chrosha.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation chrosha.exe -
Executes dropped EXE 1 IoCs
Processes:
chrosha.exepid process 2444 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.
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exechrosha.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Software\Wine b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe Key opened \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Software\Wine chrosha.exe -
Loads dropped DLL 3 IoCs
Processes:
rundll32.exerundll32.exerundll32.exepid process 4032 rundll32.exe 868 rundll32.exe 5048 rundll32.exe -
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exechrosha.exepid process 4008 b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe 2444 chrosha.exe -
Drops file in Windows directory 1 IoCs
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exedescription ioc process File created C:\Windows\Tasks\chrosha.job b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 16 IoCs
Processes:
b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exechrosha.exerundll32.exepowershell.exepid process 4008 b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe 4008 b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe 2444 chrosha.exe 2444 chrosha.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 868 rundll32.exe 4608 powershell.exe 4608 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
powershell.exedescription pid process Token: SeDebugPrivilege 4608 powershell.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
chrosha.exerundll32.exerundll32.exedescription pid process target process PID 2444 wrote to memory of 4032 2444 chrosha.exe rundll32.exe PID 2444 wrote to memory of 4032 2444 chrosha.exe rundll32.exe PID 2444 wrote to memory of 4032 2444 chrosha.exe rundll32.exe PID 4032 wrote to memory of 868 4032 rundll32.exe rundll32.exe PID 4032 wrote to memory of 868 4032 rundll32.exe rundll32.exe PID 868 wrote to memory of 2516 868 rundll32.exe netsh.exe PID 868 wrote to memory of 2516 868 rundll32.exe netsh.exe PID 868 wrote to memory of 4608 868 rundll32.exe powershell.exe PID 868 wrote to memory of 4608 868 rundll32.exe powershell.exe PID 2444 wrote to memory of 5048 2444 chrosha.exe rundll32.exe PID 2444 wrote to memory of 5048 2444 chrosha.exe rundll32.exe PID 2444 wrote to memory of 5048 2444 chrosha.exe rundll32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.exe"C:\Users\Admin\AppData\Local\Temp\b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483.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:4008
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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
- Checks computer location settings
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2444 -
C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\cred64.dll, Main2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Windows\system32\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\cred64.dll, Main3⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:868 -
C:\Windows\system32\netsh.exenetsh wlan show profiles4⤵PID:2516
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command Compress-Archive -Path 'C:\Users\Admin\AppData\Local\Temp\_Files_\' -DestinationPath 'C:\Users\Admin\AppData\Local\Temp\018855536220_Desktop.zip' -CompressionLevel Optimal4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4608 -
C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\c1ec479e5342a2\clip64.dll, Main2⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:5048
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.8MB
MD5fe3346ec5bed65ea2f056fb8898a2f5c
SHA16049004590734a9ba8124d9b7779a0d8ccd0ff2b
SHA256b5973db1b5c044c534a9f809bc2c45b486373325ce1cfd75ff4600f00fd59483
SHA512dbed2b9a6de8a1646e167ef74db323e458cf3a7b1518cbf412f66c04db470d232018ce600f5ee0a56c6f47975e2435061a24b564814da190e5c3f2ff434991c1
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
109KB
MD5154c3f1334dd435f562672f2664fea6b
SHA151dd25e2ba98b8546de163b8f26e2972a90c2c79
SHA2565f431129f97f3d56929f1e5584819e091bd6c854d7e18503074737fc6d79e33f
SHA5121bca69bbcdb7ecd418769e9d4befc458f9f8e3cee81feb7316bb61e189e2904f4431e4cc7d291e179a5dec441b959d428d8e433f579036f763bbad6460222841
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Filesize
1.2MB
MD5f35b671fda2603ec30ace10946f11a90
SHA1059ad6b06559d4db581b1879e709f32f80850872
SHA25683e3df5bec15d5333935bea8b719a6d677e2fb3dc1cf9e18e7b82fd0438285c7
SHA512b5fa27d08c64727cef7fdda5e68054a4359cd697df50d70d1d90da583195959a139066a6214531bbc5f20cd4f9bc1ca3e4244396547381291a6a1d2df9cf8705