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Analysis
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max time kernel
128s -
max time network
143s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
11/08/2024, 00:28
Behavioral task
behavioral1
Sample
krampus.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
krampus.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral3
Sample
krampus.exe
Resource
macos-20240711.1-en
General
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Target
krampus.exe
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Size
5.6MB
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MD5
e3f7cfc15aecea1f817fd9e1c91b2b33
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SHA1
4427bc42173e964762c4f003628502ec601d45c0
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SHA256
64706688105210a3c3d265aceb11475e38bc1f35ffcd72a8d38bacc0806653eb
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SHA512
ed233e15a3d3947feb95c388355d7a8b05a06b2c74997b80dba331facf991f57ae252976a2465bec74c13075d06fa5cdc1930ee8e87da830e6bd1821f8eb2733
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SSDEEP
98304:R4UGDPt5D8brm4+Bo4M4du9I0y1ZKnnyZhK9iYRiBSqXGijc/Elh:R4/PD8m4IAOsI0fyiwS/iYsh
Malware Config
Signatures
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resource yara_rule behavioral1/memory/108-15-0x0000000140000000-0x0000000140AF3000-memory.dmp vmprotect behavioral1/memory/108-40-0x0000000140000000-0x0000000140AF3000-memory.dmp vmprotect -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 108 krampus.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 1 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 IEXPLORE.EXE -
Kills process with taskkill 1 IoCs
pid Process 2944 taskkill.exe -
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{CB780FF1-5778-11EF-BB68-FA57F1690589} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\SearchScopes iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\InternetRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\MINIE iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\LowRegistry iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\IntelliForms iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Zoom iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\GPU iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 200ff9a285ebda01 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\IETld\LowMic iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000bb7c5835718279428690b074aa627b7000000000020000000000106600000001000020000000a58e7728c66462df5d2c7b6dacbca837dc96af0eef8b7f7f04ee86803646cd64000000000e80000000020000200000004b796f6a1dd1c6fe264564f9326518280e2fd72db7033e5c793e4664a29fb5a720000000b71c9a4f1ab40e5cdfb220434762204d5d4c9bfed3058ef2d469f9c8d7c31cd940000000e3e568d10b23ccda79ba5e276a5d5bd1a72c3211f0eb6eac457b855e4a16760dbcecd60d90336a4d4e2b3dbdb0262bdb0113983def19770cdd31a987b4acbdb3 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Toolbar iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\PageSetup iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1" iexplore.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 108 krampus.exe 108 krampus.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2944 taskkill.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1096 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1096 iexplore.exe 1096 iexplore.exe 1404 IEXPLORE.EXE 1404 IEXPLORE.EXE 1404 IEXPLORE.EXE 1404 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 108 wrote to memory of 2228 108 krampus.exe 38 PID 108 wrote to memory of 2228 108 krampus.exe 38 PID 108 wrote to memory of 2228 108 krampus.exe 38 PID 2228 wrote to memory of 1096 2228 cmd.exe 40 PID 2228 wrote to memory of 1096 2228 cmd.exe 40 PID 2228 wrote to memory of 1096 2228 cmd.exe 40 PID 108 wrote to memory of 1800 108 krampus.exe 41 PID 108 wrote to memory of 1800 108 krampus.exe 41 PID 108 wrote to memory of 1800 108 krampus.exe 41 PID 1800 wrote to memory of 2944 1800 cmd.exe 43 PID 1800 wrote to memory of 2944 1800 cmd.exe 43 PID 1800 wrote to memory of 2944 1800 cmd.exe 43 PID 1096 wrote to memory of 1404 1096 iexplore.exe 44 PID 1096 wrote to memory of 1404 1096 iexplore.exe 44 PID 1096 wrote to memory of 1404 1096 iexplore.exe 44 PID 1096 wrote to memory of 1404 1096 iexplore.exe 44 PID 1096 wrote to memory of 1828 1096 iexplore.exe 49 PID 1096 wrote to memory of 1828 1096 iexplore.exe 49 PID 1096 wrote to memory of 1828 1096 iexplore.exe 49 PID 1096 wrote to memory of 1828 1096 iexplore.exe 49
Processes
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C:\Users\Admin\AppData\Local\Temp\krampus.exe"C:\Users\Admin\AppData\Local\Temp\krampus.exe"1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:108 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c start https://krampus-three.vercel.app/2⤵
- Suspicious use of WriteProcessMemory
PID:2228 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe" https://krampus-three.vercel.app/3⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1096 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1096 CREDAT:275457 /prefetch:24⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1404
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C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1096 CREDAT:1192967 /prefetch:24⤵PID:1828
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c taskkill /f /im HTTPDebuggerUI.exe >nul 2>&12⤵
- Suspicious use of WriteProcessMemory
PID:1800 -
C:\Windows\system32\taskkill.exetaskkill /f /im HTTPDebuggerUI.exe3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2944
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C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3568 --field-trial-handle=1216,i,9949926175785511248,12360656452513600799,131072 /prefetch:81⤵PID:2464
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C:\Windows\explorer.exe"C:\Windows\explorer.exe"1⤵PID:2504
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD55778fe9a8a61348d14474d20617a022b
SHA157ccc7b70c85664ab5eefb36035fa005367cbdba
SHA256a90e591f9523b5c1af3b0eb9f9662bb01060428c623b3222b581ba3fe81fdac3
SHA512e5ef53777970e121ced1af273e5cfdc9d5d34ca28b3333dc15633000f21c457675ee94df9d839aa66514007c67af9286dac540d64fb24c55842d570e13c1ae46
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD531aacc91c6c5dcca1b7d86e8b6441dd1
SHA191ac3fbc911f9a6a63ffb75260581491877769a0
SHA256df28b8f4665f9a93d6cdb72e6e66e567997af2d656114ddf9473a1d7e555e636
SHA512ef93578faa51581df6062b216a0c739e67d10cd9cc92a0626655fb1efef9e86b5ca143a5b0c1e388b17e4a22b7539ae50f9ad58be077115ee294d42c63fea407
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD5fd8bf2170d00285225ec43d3839254ba
SHA189938afef3f2f02bdb144d567dc1c89229c6c711
SHA25681e3d8823fe3ba6e24e731626d22c397b8faad17c8b30ad7d76678067575db39
SHA512e104228e766ff6975bf876a95b0e1fbca388baae84a5f22636b9d2722c57a3425b1bad7deaa3633d65ca73b04a096fc2f2a3384173af6cf13eb5fd521cb53fa4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD572dc7e69d5554e448b120960f0a41b99
SHA188703153607d87da370c647a35277f708aee3470
SHA25630431be0f95c8e6d78ec6ff0cb77ace56dceafbe4991540346153704dc99e44c
SHA512057ce5620ea5cb3bda61258a0df55656adb8c0f52a66fbae6928ee93676c1d553ec8a0f6874dcd4a45c7ccef87d6a65febce2855612f2626c39f3a8e81db6ee7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD5608d737b4268c8e477713363d25ed7b5
SHA1eaf525e28b6ad0ae1757d31660749a4213d79a61
SHA256f5e34b1dfe27aeebc0cd36dd4efd2523e4789d7d05a61d5e934b56d2e0e81008
SHA5122156ed3aeac22b07e9bf07a3c26dadef79d3cc7f615cc9f91269e47e67db7be604d05a6c4bd8815d8e9a61f9c12df8f13f2dd09ebb539f8dacd7efc387aae28c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD58990af8b7d4bb4d9bab482eb1c60e258
SHA1c156da08248f93ccd1b86bfaded503e5eedb2b6e
SHA2564d4f5186eb0763a2bcb00ac980f25f0cf44d1932af5aab152ae65f71427c2e2f
SHA5120553a47b48ff71f47ee0c21a83a95ce8324f242cce91cbc8d1dc05a69d8b3e50ee43ac13c10cd0d362bf1ee5e9cfe8af813cacaaed5d8f2b2233a245d85d4581
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD59f98cc0151f641bb297cf8d22f5aac06
SHA1a46f15f0f4708058c45a9a568389a2e8be48ae3e
SHA2568c0f16a8c7d6da37358d53e97866188677d91c52788ed45016ef673bb66a1d6d
SHA512048614b9644d77e3086f3c4fcb80354bb1e02b6b97ed036a8fa5bcf85a23a62e482d13f6d555a4a989d194c5333e8ec51c7863d4a233d68f0a71187a2f9f3d93
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD5cd8c90c99255de07981d88dc2030e3d1
SHA18e5a3c5e6669d8d0c9c5080c6aaeb2c9fd06344d
SHA25631dad5ae7597ab55e7d7f81162c4552412bb5baea5a877ecf884641282d8c57a
SHA512a80c068db62a139ddb731b6d7d32239180460055005c22e0f5959445eb8ed34cfb4c35c6c956b5c385d14ec9edf8263acd3edfb2dff353bbdcfe48354bcb0c9d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize342B
MD5093c37a545f784bb1c84e62a000c19ed
SHA18e244ab28fd265221ede728a4b4ef1a9a62a84b6
SHA2567c3f42331b08e47bfd2d50763169f694c8e07d2ea8721c65035e9caf775f7da2
SHA51232468c7ae647b981ba32dd06b12f8e21f9343ff0f8079d5a043bc3ea82d5a4bd48be3d5864111d466a36538a19ae08443b68abb8be4094fec0cf0cf63ae2fcc7
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Filesize
70KB
MD549aebf8cbd62d92ac215b2923fb1b9f5
SHA11723be06719828dda65ad804298d0431f6aff976
SHA256b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
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Filesize
181KB
MD54ea6026cf93ec6338144661bf1202cd1
SHA1a1dec9044f750ad887935a01430bf49322fbdcb7
SHA2568efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
SHA5126c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b
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Filesize
16KB
MD575c508375283e9049b9105a0d9d6cf7f
SHA19ddfaf24369994718f87d4b78fa83f62f11975f8
SHA25676fbd4021285eca82b4a36a2eed21d57e3327ade081bd5c9a8e98ca1e4a4c71d
SHA512444adff7ac9f18d05e776e48e4a1db6b20f2d7113ade15100c20ef380afd2ae05ba56516cde608c80f6226e4dd0b00b5f3e8aee77e0149cbc13de4cf0e8cf125