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Analysis
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max time kernel
94s -
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, 10:45
Static task
static1
Behavioral task
behavioral1
Sample
4c7e9d40b99d411e7c565f57c0a25a9b857cb9d55d0117e20253e515a62ecccfN.dll
Resource
win7-20240903-en
General
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Target
4c7e9d40b99d411e7c565f57c0a25a9b857cb9d55d0117e20253e515a62ecccfN.dll
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Size
112KB
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MD5
cdf953ab2d4419f1d56c55225f259ca0
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SHA1
ae34a2e019bdf193502f45b12b5b0247b598d0c0
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SHA256
4c7e9d40b99d411e7c565f57c0a25a9b857cb9d55d0117e20253e515a62ecccf
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SHA512
a7f15984692cc8964d7f35c2a8c107eb4c1149ed8158e57a0a8ecfbffd40cc5e3c2bc458928219dadb75166604ef38fc9788f7962c71fa5753e047c4f86dd00a
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SSDEEP
1536:fwKq8q9fvGBgjwtjKmbWvPnkEaH9KoMlftStqnvjI997F33W5sf1:IKkvGB5t2mbX9wt8/5Gmf1
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 2732 rundll32Srv.exe 1968 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/2732-4-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/files/0x0009000000023c8b-3.dat upx behavioral2/memory/2732-6-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/1968-15-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/1968-17-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/1968-12-0x0000000000400000-0x000000000042E000-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\px9078.tmp rundll32Srv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe rundll32Srv.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.
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 Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "440678881" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3501647010" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31148985" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3501647010" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3506177799" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{FC48940E-B7AC-11EF-A4B7-DA67B56E6C1B} = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31148985" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31148985" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\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-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe 1968 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1304 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1304 iexplore.exe 1304 iexplore.exe 3572 IEXPLORE.EXE 3572 IEXPLORE.EXE 3572 IEXPLORE.EXE 3572 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 3284 wrote to memory of 4508 3284 rundll32.exe 82 PID 3284 wrote to memory of 4508 3284 rundll32.exe 82 PID 3284 wrote to memory of 4508 3284 rundll32.exe 82 PID 4508 wrote to memory of 2732 4508 rundll32.exe 83 PID 4508 wrote to memory of 2732 4508 rundll32.exe 83 PID 4508 wrote to memory of 2732 4508 rundll32.exe 83 PID 2732 wrote to memory of 1968 2732 rundll32Srv.exe 84 PID 2732 wrote to memory of 1968 2732 rundll32Srv.exe 84 PID 2732 wrote to memory of 1968 2732 rundll32Srv.exe 84 PID 1968 wrote to memory of 1304 1968 DesktopLayer.exe 85 PID 1968 wrote to memory of 1304 1968 DesktopLayer.exe 85 PID 1304 wrote to memory of 3572 1304 iexplore.exe 86 PID 1304 wrote to memory of 3572 1304 iexplore.exe 86 PID 1304 wrote to memory of 3572 1304 iexplore.exe 86
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\4c7e9d40b99d411e7c565f57c0a25a9b857cb9d55d0117e20253e515a62ecccfN.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3284 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\4c7e9d40b99d411e7c565f57c0a25a9b857cb9d55d0117e20253e515a62ecccfN.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4508 -
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:2732 -
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:1968 -
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:1304 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1304 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:3572
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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
MD5442f2149a2677d6452319fd147903a7d
SHA10d4d3aacb7eb8b19c3856a770d96626a8323e7db
SHA2567d0e2aad4d879f8a8bc62e6dc5c62964ac32317066428949f3a2b1b8331d8dfc
SHA512c27ac496b39316dcaa2fdfd47ecc3d9707fc926cf5c5d1ea5d4d79c8c9d31670607b11d291f226e2795c9bd40ae2a8b4ce3a4c659f6e4647041153cfc6c16654
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD50f9ce386ed56b5f6d52d99b25efa3260
SHA105928f710a0f879f51b6df29a3aefd9b2c694895
SHA25679357c19615292e5fbd613c11f87bbd17b64094b5eb727f42fd06ef65ca939fb
SHA5123288355283f3954a0a1e6fae18d1a02e56eb7672c043e91dbdda5e2803abfe28224f2070d8d46d3c910a5b13dcebb116de42cc3601f6f105e301b191ceffc571
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a