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Analysis
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max time kernel
114s -
max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
11/12/2024, 07:19
Behavioral task
behavioral1
Sample
d7d81a23b372acd8d2bf2e58e9eabd8431c3e7a34b0fc3cbec149236d0d37bdbN.dll
Resource
win7-20240903-en
General
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Target
d7d81a23b372acd8d2bf2e58e9eabd8431c3e7a34b0fc3cbec149236d0d37bdbN.dll
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Size
181KB
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MD5
1bdcc3f06648e31a30842fad2e90d430
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SHA1
45d2bd5854bd427796cec36e6fa44f10333705b2
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SHA256
d7d81a23b372acd8d2bf2e58e9eabd8431c3e7a34b0fc3cbec149236d0d37bdb
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SHA512
0afc0c8614bfe64921681401fcf0cb6d97ed01572f69648b0c98646aaa177b43d0900c521da6456ee5ca3b15fc692c230d934b7d4ad0cf7d1cc33a4c1dfa69e6
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SSDEEP
3072:nhvKdimeyIEZ1dCJumZF7eOmgyNwV1Hhr768BHQg7bv//MFwFPtj+5X4BIH:gzemdCJfZ0lNK1Hh36YHVvPMFWe
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 2260 rundll32Srv.exe 4504 DesktopLayer.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe -
resource yara_rule behavioral2/memory/1912-0-0x0000000010000000-0x000000001008A000-memory.dmp upx behavioral2/files/0x0009000000023c98-3.dat upx behavioral2/memory/2260-4-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/2260-7-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/4504-13-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/4504-15-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/1912-18-0x0000000010000000-0x000000001008A000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe File opened for modification C:\Program Files (x86)\Microsoft\pxAECE.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.exe -
Program crash 1 IoCs
pid pid_target Process procid_target 4952 1912 WerFault.exe 82 -
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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32Srv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language DesktopLayer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE -
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31148957" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "440666547" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "411437628" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31148957" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "411125333" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31148957" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\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 Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31148957" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{4370D5D5-B790-11EF-B9D5-E26222BAF6A3} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "411125333" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "411437628" IEXPLORE.EXE -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe 4504 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3916 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 3916 iexplore.exe 3916 iexplore.exe 3440 IEXPLORE.EXE 3440 IEXPLORE.EXE 3440 IEXPLORE.EXE 3440 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 5068 wrote to memory of 1912 5068 rundll32.exe 82 PID 5068 wrote to memory of 1912 5068 rundll32.exe 82 PID 5068 wrote to memory of 1912 5068 rundll32.exe 82 PID 1912 wrote to memory of 2260 1912 rundll32.exe 83 PID 1912 wrote to memory of 2260 1912 rundll32.exe 83 PID 1912 wrote to memory of 2260 1912 rundll32.exe 83 PID 2260 wrote to memory of 4504 2260 rundll32Srv.exe 85 PID 2260 wrote to memory of 4504 2260 rundll32Srv.exe 85 PID 2260 wrote to memory of 4504 2260 rundll32Srv.exe 85 PID 4504 wrote to memory of 3916 4504 DesktopLayer.exe 86 PID 4504 wrote to memory of 3916 4504 DesktopLayer.exe 86 PID 3916 wrote to memory of 3440 3916 iexplore.exe 88 PID 3916 wrote to memory of 3440 3916 iexplore.exe 88 PID 3916 wrote to memory of 3440 3916 iexplore.exe 88
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d7d81a23b372acd8d2bf2e58e9eabd8431c3e7a34b0fc3cbec149236d0d37bdbN.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:5068 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d7d81a23b372acd8d2bf2e58e9eabd8431c3e7a34b0fc3cbec149236d0d37bdbN.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1912 -
C:\Windows\SysWOW64\rundll32Srv.exeC:\Windows\SysWOW64\rundll32Srv.exe3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2260 -
C:\Program Files (x86)\Microsoft\DesktopLayer.exe"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4504 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3916 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3916 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:3440
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1912 -s 6683⤵
- Program crash
PID:4952
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1912 -ip 19121⤵PID:3592
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
MD587f8376b71b1fd35da4b511eff055888
SHA10c55fba0aa699282bbe4d129dd0ba16d4e377ce9
SHA256a1383ed3b4f8967fb19f5b16bfe41eb3242b296ffc06c1098fbe1d1a04a7003f
SHA5128556ed20a3d9daf8f74b2eceaab6a3773b69d5c9524ba8dbb8af1ad64b2235165e487c41646e357be5906aaa7f0f4c57ff8dc9ea2acc0c87f443d3ad083c9031
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD5cb43d00bddbb3b2340b768d81f62dcf6
SHA1868f45eea01b701ec2bb831cb570ac1795eb753f
SHA25691f13bd76df68da04c5f43a1c2ae476b2c0a12d307624d6cbc5e3d4ec39f365d
SHA512e8caacc60a6a698763a757fb5cee582242612e0f008adab10fceba789b11a9fa273c430256649cc7ada2497c2820a82d53cd08019dcee265bfea5664ae456824
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Filesize
15KB
MD51a545d0052b581fbb2ab4c52133846bc
SHA162f3266a9b9925cd6d98658b92adec673cbe3dd3
SHA256557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1
SHA512bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a