Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
24-12-2024 01:07
Behavioral task
behavioral1
Sample
5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
Resource
win10v2004-20241007-en
General
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Target
5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
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Size
924KB
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MD5
62d70f8671fd2008fc9f0e17d57d809c
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SHA1
8b743631a6ea12f7c00a3b586ebdc4e81d0cd892
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SHA256
5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d
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SHA512
58bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4
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SSDEEP
24576:ZGbU4MROxnFE3idc1RlrZlI0AilFEvxHiaj:ZGbHMiudblrZlI0AilFEvxHi
Malware Config
Extracted
orcus
testbuild1
127.0.0.1:1268
979c2ee9d7ff48d0a2e4e2df3c2c864d
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autostart_method
Registry
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enable_keylogger
true
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install_path
%programfiles%\Common Files\System\HD Audio\HDAudio.exe
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reconnect_delay
10000
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registry_keyname
HDAudioDriver
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taskscheduler_taskname
HDAudioDriver
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watchdog_path
AppData\HDAudioWatchdog.exe
Signatures
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Orcus family
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Orcus main payload 1 IoCs
resource yara_rule behavioral2/files/0x000b000000023b78-65.dat family_orcus -
Orcurs Rat Executable 2 IoCs
resource yara_rule behavioral2/files/0x000b000000023b78-65.dat orcus behavioral2/memory/3564-75-0x0000000000540000-0x000000000062E000-memory.dmp orcus -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe Key value queried \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation HDAudio.exe Key value queried \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation HDAudioWatchdog.exe -
Executes dropped EXE 6 IoCs
pid Process 512 WindowsInput.exe 4028 WindowsInput.exe 3564 HDAudio.exe 3412 HDAudio.exe 2296 HDAudioWatchdog.exe 4812 HDAudioWatchdog.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HDAudioDriver = "\"C:\\Program Files\\Common Files\\System\\HD Audio\\HDAudio.exe\"" HDAudio.exe -
Drops desktop.ini file(s) 2 IoCs
description ioc Process File created C:\Windows\assembly\Desktop.ini 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File opened for modification C:\Windows\assembly\Desktop.ini 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe -
Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\WindowsInput.exe.config 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File created C:\Windows\SysWOW64\WindowsInput.InstallState WindowsInput.exe File created C:\Windows\SysWOW64\WindowsInput.exe 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe -
Drops file in Program Files directory 3 IoCs
description ioc Process File created C:\Program Files\Common Files\System\HD Audio\HDAudio.exe 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File opened for modification C:\Program Files\Common Files\System\HD Audio\HDAudio.exe 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File created C:\Program Files\Common Files\System\HD Audio\HDAudio.exe.config 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\assembly 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File created C:\Windows\assembly\Desktop.ini 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe File opened for modification C:\Windows\assembly\Desktop.ini 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language HDAudioWatchdog.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language HDAudioWatchdog.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3564 HDAudio.exe 3564 HDAudio.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 4812 HDAudioWatchdog.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe 3564 HDAudio.exe 4812 HDAudioWatchdog.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 3564 HDAudio.exe Token: SeDebugPrivilege 2296 HDAudioWatchdog.exe Token: SeDebugPrivilege 4812 HDAudioWatchdog.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3564 HDAudio.exe -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 3528 wrote to memory of 2456 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 83 PID 3528 wrote to memory of 2456 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 83 PID 2456 wrote to memory of 3576 2456 csc.exe 85 PID 2456 wrote to memory of 3576 2456 csc.exe 85 PID 3528 wrote to memory of 512 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 87 PID 3528 wrote to memory of 512 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 87 PID 3528 wrote to memory of 3564 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 90 PID 3528 wrote to memory of 3564 3528 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe 90 PID 3564 wrote to memory of 2296 3564 HDAudio.exe 92 PID 3564 wrote to memory of 2296 3564 HDAudio.exe 92 PID 3564 wrote to memory of 2296 3564 HDAudio.exe 92 PID 2296 wrote to memory of 4812 2296 HDAudioWatchdog.exe 93 PID 2296 wrote to memory of 4812 2296 HDAudioWatchdog.exe 93 PID 2296 wrote to memory of 4812 2296 HDAudioWatchdog.exe 93 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe"C:\Users\Admin\AppData\Local\Temp\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe"1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3528 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\8xzrb__n.cmdline"2⤵
- Suspicious use of WriteProcessMemory
PID:2456 -
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES93D5.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC93D4.tmp"3⤵PID:3576
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C:\Windows\SysWOW64\WindowsInput.exe"C:\Windows\SysWOW64\WindowsInput.exe" --install2⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:512
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C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3564 -
C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe"C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /launchSelfAndExit "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 35643⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2296 -
C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe"C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /watchProcess "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 35644⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4812
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C:\Windows\SysWOW64\WindowsInput.exe"C:\Windows\SysWOW64\WindowsInput.exe"1⤵
- Executes dropped EXE
PID:4028
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C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"1⤵
- Executes dropped EXE
PID:3412
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
924KB
MD562d70f8671fd2008fc9f0e17d57d809c
SHA18b743631a6ea12f7c00a3b586ebdc4e81d0cd892
SHA2565420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d
SHA51258bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4
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Filesize
425B
MD54eaca4566b22b01cd3bc115b9b0b2196
SHA1e743e0792c19f71740416e7b3c061d9f1336bf94
SHA25634ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb
SHA512bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1
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Filesize
76KB
MD54c548d010675be10fa11c1d48f962f68
SHA10d2d5aa902c667bb303fa1954a88713a4691bd85
SHA2560b2df40992a87bb7cf06abdcdf5d5fb053e8608282f38e998d4656682bb25d79
SHA512f98b61cbfafc29c947e15480b04267448ffc5e21dfa1345d8efb2c920d31950fb5b7bab6409b7c8c64b8122d985e85f5f4a1207e9dbe22e6c9853dddd742e18e
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Filesize
1KB
MD518877f70c61da96989e05432eaa3de31
SHA100921640b68ff4b38da389a527b717a8244b7813
SHA2565643791a5356bba906b729bed2074ab3e5302872eabf6c505f49cead2774ab85
SHA512909d2cc920a2f35e478b758bf7ff4a0a99bd9c19dbef92b7d785eec105f6d3f9ca489933680428b876d1f2ebb00481b8b333f791b43968d39a93b1fd3284d7a6
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Filesize
1KB
MD5d20362a73dadaa326ffaf7169be0e4bf
SHA140a65adc63b4a53ad50f9999731ac320d166fa97
SHA256d35d4d70ece37f3ec16adbc2402c77e16332ea4ed60b1c4dee0cc7dd71f77c04
SHA512507a6d19711259761a3642bfbbd27ed330d2bd1c63c38fa3d6e07ace73e72347a3eae1c63aead05bebc327dbaa3a1015e6b32d69b90b03993661bc17b45e73ec
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Filesize
9KB
MD5913967b216326e36a08010fb70f9dba3
SHA17b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf
SHA2568d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a
SHA512c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33
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Filesize
21KB
MD5e6fcf516d8ed8d0d4427f86e08d0d435
SHA1c7691731583ab7890086635cb7f3e4c22ca5e409
SHA2568dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337
SHA512c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e
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Filesize
357B
MD5a2b76cea3a59fa9af5ea21ff68139c98
SHA135d76475e6a54c168f536e30206578babff58274
SHA256f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839
SHA512b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad
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Filesize
208KB
MD50e19990a9552aa36b90f01e52761f7fa
SHA10dec5bf4ee18a2bc49435cbfa490d59d9c780e86
SHA2565096c3adf65e995cfd98c90c3b00011401d9e438021586b7f54f0d5a697ead96
SHA51265feaace4aeef3398371847040220a7945310d7b1c00b5527aa674c6f8853dfc02d7edece21f9c75f8b680e6c0c385bd05c67cf776a758e6abd24714bff888ef
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Filesize
349B
MD54c5895a8785e3665594f7f2aaf46ea33
SHA1e87379a0f7bdd2560da8604c3f02a86af017fb01
SHA2569778bd1f90b2f665328d6857bdd315b4f7894eac02df63b3372b664b3d8c56ff
SHA51293e07323ce06db90a03ffa95ff4a5e0e824c7b148feab989c604affa313b43e29ce448356bd52af35292f0f8bcf97d6d2cfb4f5687472e25ea3c2826248e224e
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Filesize
676B
MD57fcffe8f30701c0a13aa9dfb4f92cdc9
SHA1f83dd5324d61f6dcf06822e9cdc8b233bf44c8ef
SHA2566c1ab82816615efd206d0929bfb1b28740fdeb3a24d5ad3b72ce149cd0ee6b9c
SHA512aa3660cedaab773c404b57b22e59a51cecfb516ace5c0c580cf9a534c5745b7f6a5a09755043634fa8508e28c626e3f6f8082b2c4d84ecb06d4079e097eba7e9