Analysis
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max time kernel
91s -
max time network
120s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
01/01/2025, 14:23
Static task
static1
Behavioral task
behavioral1
Sample
ec11e1acbe4ec4242fee3f6046366c0658eba7d7e610dd99526edab5dfca5ba8N.dll
Resource
win7-20240708-en
General
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Target
ec11e1acbe4ec4242fee3f6046366c0658eba7d7e610dd99526edab5dfca5ba8N.dll
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Size
558KB
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MD5
b2e9b51d84d265f837b47911471f20c0
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SHA1
3bfc4a924d380bf26f5c5846161155b5916306d0
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SHA256
ec11e1acbe4ec4242fee3f6046366c0658eba7d7e610dd99526edab5dfca5ba8
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SHA512
c7e763c2f8bf06de2487c960fcea4c1baa4a5156d0ae464e818652c897faf36cc58539786fde686127fda405fb90caf56bc1bc6652cdb818d5a69afd947cd0e7
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SSDEEP
12288:zh8fZLyb9PzVMBC/HVMOp4PkxHLCYwZckMQMNzfld1Z:z8F+Pzr/Hfp4MIYwZckMQmzfZZ
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 3628 rundll32mgr.exe 4816 WaterMark.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe -
resource yara_rule behavioral2/memory/3628-15-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-17-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-13-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-12-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/4816-30-0x0000000000400000-0x0000000000441000-memory.dmp upx behavioral2/memory/4816-34-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/4816-40-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/4816-33-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-10-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-8-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3628-9-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/4816-41-0x0000000000400000-0x0000000000441000-memory.dmp upx behavioral2/memory/4816-42-0x0000000000400000-0x0000000000441000-memory.dmp upx behavioral2/memory/4816-45-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/4816-46-0x0000000000400000-0x0000000000421000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxC2D3.tmp rundll32mgr.exe File created C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe File opened for modification C:\Program Files (x86)\Microsoft\WaterMark.exe rundll32mgr.exe -
Program crash 1 IoCs
pid pid_target Process procid_target 3856 2000 WerFault.exe 88 -
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 rundll32mgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WaterMark.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31153240" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31153240" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3536804696" IEXPLORE.EXE Set value (data) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{FE46D03A-C84B-11EF-B9B6-F6235BFAC6D3} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31153240" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3536804696" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31153240" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "442506398" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3536179389" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3536179389" iexplore.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe 4816 WaterMark.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4816 WaterMark.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2284 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 2284 iexplore.exe 2284 iexplore.exe 3136 IEXPLORE.EXE 3136 IEXPLORE.EXE 3136 IEXPLORE.EXE 3136 IEXPLORE.EXE -
Suspicious use of UnmapMainImage 2 IoCs
pid Process 3628 rundll32mgr.exe 4816 WaterMark.exe -
Suspicious use of WriteProcessMemory 25 IoCs
description pid Process procid_target PID 3672 wrote to memory of 3624 3672 rundll32.exe 85 PID 3672 wrote to memory of 3624 3672 rundll32.exe 85 PID 3672 wrote to memory of 3624 3672 rundll32.exe 85 PID 3624 wrote to memory of 3628 3624 rundll32.exe 86 PID 3624 wrote to memory of 3628 3624 rundll32.exe 86 PID 3624 wrote to memory of 3628 3624 rundll32.exe 86 PID 3628 wrote to memory of 4816 3628 rundll32mgr.exe 87 PID 3628 wrote to memory of 4816 3628 rundll32mgr.exe 87 PID 3628 wrote to memory of 4816 3628 rundll32mgr.exe 87 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2000 4816 WaterMark.exe 88 PID 4816 wrote to memory of 2284 4816 WaterMark.exe 93 PID 4816 wrote to memory of 2284 4816 WaterMark.exe 93 PID 4816 wrote to memory of 3208 4816 WaterMark.exe 94 PID 4816 wrote to memory of 3208 4816 WaterMark.exe 94 PID 2284 wrote to memory of 3136 2284 iexplore.exe 96 PID 2284 wrote to memory of 3136 2284 iexplore.exe 96 PID 2284 wrote to memory of 3136 2284 iexplore.exe 96
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\ec11e1acbe4ec4242fee3f6046366c0658eba7d7e610dd99526edab5dfca5ba8N.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3672 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\ec11e1acbe4ec4242fee3f6046366c0658eba7d7e610dd99526edab5dfca5ba8N.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3624 -
C:\Windows\SysWOW64\rundll32mgr.exeC:\Windows\SysWOW64\rundll32mgr.exe3⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3628 -
C:\Program Files (x86)\Microsoft\WaterMark.exe"C:\Program Files (x86)\Microsoft\WaterMark.exe"4⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:4816 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe5⤵PID:2000
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 2046⤵
- Program crash
PID:3856
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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:2284 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2284 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:3136
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
PID:3208
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2000 -ip 20001⤵PID:4388
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
MD530f59b20e935520badc298242cb4cff1
SHA100622b2054eb148a8459c2ccd0b22606c2d5c7f6
SHA2564a981d199e551f2b8c8fa22f0e3fbc264e876e5ed243d83331b2a6083a753e3c
SHA512f22ca09eb3266cee3f363e4f3f955745382679d136d61e7c27f81081cd77efa5f82f82220526928f73049e692b7c060f64032dfae0f967c579c6e6acfd2e8d21
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD51c0433aea172a5ee35a240932d71b143
SHA10f61a0aae190837ce07e669481f08d2f93076735
SHA2564e7d334dd26d3fd81385b02684ec8181bd54c8a1619440a1380abb0369a10f5e
SHA512dffaaf94604b46e63223980090e4d692de02aaa46c259dec293000d6552aa3f3f74f52b38cbf20185da229698c6eb3a9ad21e17ce67e35e13476fe51addb4bf8
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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
123KB
MD52cc65cb5dea68dcb6aefbce0d78a3fa3
SHA1f05fd2ad722e4feb9f90fec42081b00acd5b3810
SHA256a461da98eb645a7df5450ef0ac644674d32a557ce94b2529bc3fd8b896143ef3
SHA512e67951b2dbad43c143e6a7f9058dccbba669913804ed8c74720a5694edd1e2a3021c98affa68b0565b2a266ec5132b531d79eeb41989bc1c418d5bb8842b7db5