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Analysis
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max time kernel
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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
10/12/2024, 20:18
Static task
static1
Behavioral task
behavioral1
Sample
581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe
Resource
win7-20240708-en
General
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Target
581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe
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Size
1.3MB
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MD5
f5dd132e1f2e3b7e8aede13e367eb0e0
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SHA1
5f667763313270f383b6f27d1039150a4979844e
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SHA256
581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7
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SHA512
24d7fc0bcad3af3820d31e402260ea4c165263f71024191e5eeb06e434b2ba51bffbcaf5f829bcc0046b021439961bbb49683a0560ba15908ddba0b61c2a4a18
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SSDEEP
24576:N+TyV8jQFntoEiA0lYA0dILdBUgASQaob7vK/D6zyMxdv4Es:N+TNsTJiiA0dILdBUgzub3yMLvv
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 3432 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe 4460 DesktopLayer.exe -
resource yara_rule behavioral2/files/0x000c000000023b79-3.dat upx behavioral2/memory/3432-4-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/3432-8-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/4460-13-0x0000000000400000-0x000000000042E000-memory.dmp upx behavioral2/memory/4460-15-0x0000000000400000-0x000000000042E000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxA72D.tmp 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe File created C:\Program Files (x86)\Microsoft\DesktopLayer.exe 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe File opened for modification C:\Program Files (x86)\Microsoft\DesktopLayer.exe 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.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 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.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-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31148864" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3419379973" 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 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{F7129A80-B733-11EF-B9D5-CAFD856C81B1} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Main 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\DomainSuggestion 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 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\LastUpdateLowDateTime = "3413911483" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3414067092" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery 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 Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31148864" 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\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ 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\LastCheckForUpdateHighDateTime = "31148864" 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 Set value (int) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "440626903" 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 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\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe 4460 DesktopLayer.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 5060 iexplore.exe -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 5012 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe 5012 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe 5060 iexplore.exe 5060 iexplore.exe 4224 IEXPLORE.EXE 4224 IEXPLORE.EXE 4224 IEXPLORE.EXE 4224 IEXPLORE.EXE -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 5012 wrote to memory of 3432 5012 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe 82 PID 5012 wrote to memory of 3432 5012 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe 82 PID 5012 wrote to memory of 3432 5012 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe 82 PID 3432 wrote to memory of 4460 3432 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe 83 PID 3432 wrote to memory of 4460 3432 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe 83 PID 3432 wrote to memory of 4460 3432 581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe 83 PID 4460 wrote to memory of 5060 4460 DesktopLayer.exe 84 PID 4460 wrote to memory of 5060 4460 DesktopLayer.exe 84 PID 5060 wrote to memory of 4224 5060 iexplore.exe 85 PID 5060 wrote to memory of 4224 5060 iexplore.exe 85 PID 5060 wrote to memory of 4224 5060 iexplore.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe"C:\Users\Admin\AppData\Local\Temp\581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7N.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5012 -
C:\Users\Admin\AppData\Local\Temp\581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exeC:\Users\Admin\AppData\Local\Temp\581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3432 -
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:4460 -
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:5060 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:5060 CREDAT:17410 /prefetch:25⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:4224
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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
MD587f8376b71b1fd35da4b511eff055888
SHA10c55fba0aa699282bbe4d129dd0ba16d4e377ce9
SHA256a1383ed3b4f8967fb19f5b16bfe41eb3242b296ffc06c1098fbe1d1a04a7003f
SHA5128556ed20a3d9daf8f74b2eceaab6a3773b69d5c9524ba8dbb8af1ad64b2235165e487c41646e357be5906aaa7f0f4c57ff8dc9ea2acc0c87f443d3ad083c9031
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD54945d1980b76a436c96a13a5c4ff0a65
SHA155730ff8ddf97ab92d7ca94071e984c57e3c871f
SHA25616411bf9df219676626a0df7512ee314cd875f34e303908f1c9c4f7e503ee374
SHA512471f7b0150e3c7ff1cc4527e0667c5371f86cdb3ecde1e3cab68c39e1e09de7d8b9638da75e9b0ff3b492fc63784bdaf9a86345af7b87e9f7ad525491a2e532a
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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C:\Users\Admin\AppData\Local\Temp\581f982bc1c588ee8bde45af757ae9c0bf1e419ea07e5ccf63f06923054573a7NSrv.exe
Filesize55KB
MD5ff5e1f27193ce51eec318714ef038bef
SHA1b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA256fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
SHA512c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a