Analysis
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max time kernel
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max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
17-11-2024 04:13
Static task
static1
Behavioral task
behavioral1
Sample
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe
Resource
win7-20241023-en
General
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Target
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe
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Size
103KB
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MD5
1bc429b6743105b5951d3bd01e4ff245
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SHA1
fd773e9f1c5d3ba3ea268fd1bf5ac9759a24ed23
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SHA256
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3
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SHA512
80ba790914500f6d327cac05c9e61214a2912424e136949947a7cd67797af94abe0a0ea2702d9f3561a93d15cd6bb16b3277a991551aa0a6ec336f39be1d4a6b
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SSDEEP
1536:o+lAvqY9shtgw+RDj0fnHkucCP8DB59ROSqZ+FH5LTMrZd7+SY6S46:NwqPgwoDj0ES0l5lW+FH5/M1d7+M1
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
Processes:
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exeDesktopLayer.exepid Process 3052 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe 3528 DesktopLayer.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exedescription ioc Process File opened for modification \??\PhysicalDrive0 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe -
Processes:
resource yara_rule behavioral2/files/0x0008000000023cb6-3.dat upx behavioral2/memory/3052-4-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/3052-8-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/3528-13-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/3528-15-0x0000000000400000-0x000000000042E000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
Processes:
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exedescription ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxB9CA.tmp 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe -
System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exeDesktopLayer.exeIEXPLORE.EXEdescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language DesktopLayer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE -
Processes:
iexplore.exeIEXPLORE.EXEdescription ioc Process Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31144103" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31144103" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "438581768" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{4389DB0B-A49A-11EF-9361-FAA11E730504} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\"" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "401358892" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "401358892" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31144103" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "406671176" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
DesktopLayer.exepid Process 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe 3528 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
iexplore.exepid Process 1220 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
Processes:
iexplore.exeIEXPLORE.EXEpid Process 1220 iexplore.exe 1220 iexplore.exe 4464 IEXPLORE.EXE 4464 IEXPLORE.EXE 4464 IEXPLORE.EXE 4464 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exeDesktopLayer.exeiexplore.exedescription pid Process procid_target PID 4560 wrote to memory of 3052 4560 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe 84 PID 4560 wrote to memory of 3052 4560 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe 84 PID 4560 wrote to memory of 3052 4560 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe 84 PID 3052 wrote to memory of 3528 3052 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe 85 PID 3052 wrote to memory of 3528 3052 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe 85 PID 3052 wrote to memory of 3528 3052 39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe 85 PID 3528 wrote to memory of 1220 3528 DesktopLayer.exe 86 PID 3528 wrote to memory of 1220 3528 DesktopLayer.exe 86 PID 1220 wrote to memory of 4464 1220 iexplore.exe 87 PID 1220 wrote to memory of 4464 1220 iexplore.exe 87 PID 1220 wrote to memory of 4464 1220 iexplore.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe"C:\Users\Admin\AppData\Local\Temp\39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3.exe"1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4560 -
C:\Users\Admin\AppData\Local\Temp\39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exeC:\Users\Admin\AppData\Local\Temp\39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3052 -
C:\Program Files (x86)\Microsoft\DesktopLayer.exe"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3528 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"4⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1220 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1220 CREDAT:17410 /prefetch:25⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:4464
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize471B
MD5d2c6a662e9bd0c89bf8cd03b201f89bd
SHA17c019c00c24825eedda6b9fd3e200a39aa47771e
SHA25608fec4715e35e941a8bc409fdafb8fab8c4b97e8883325b9082562eecc1cdca2
SHA512332b7cf422c2f656208ad9add4b15ee0c4ee7ee0074f67be9b7af32e9b4b59d487250bedeed06cf1763c13fe0da82cefccc4ada975dd148bf686f9cad08fbefb
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD52489713ba3b2f758ccf65976bafc7d29
SHA1a330bb83d61136a46ba7359793582ea617a95c2f
SHA256b3169661dfca9d45a775fc806d507c6a0912e07057bcf6f118d8eed09a3ba822
SHA512e9317f5f49c204b559105e92109bc4423544f03f939c74473713f843cb7ad964715cb47758426c6ed0b35e2ad26cd3137b349f57ebbd356a1311649f375850b5
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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C:\Users\Admin\AppData\Local\Temp\39176b24223d03d6c8701d6b52a895dd42842588af0b6e017e7c9c8cd08975b3Srv.exe
Filesize55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a