Analysis
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max time kernel
93s -
max time network
145s -
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 21:17
Static task
static1
Behavioral task
behavioral1
Sample
e5b5d03c205bb368c0c586670929f884dad76498581f0bd1d415df827614fdb9.dll
Resource
win7-20241010-en
General
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Target
e5b5d03c205bb368c0c586670929f884dad76498581f0bd1d415df827614fdb9.dll
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Size
2.5MB
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MD5
83c1010fa955c1428c9ad1f5bbaf8f32
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SHA1
fa0a0f003fc74ee22336afde02eef7a63ae4d38d
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SHA256
e5b5d03c205bb368c0c586670929f884dad76498581f0bd1d415df827614fdb9
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SHA512
01f8895f61353392d4c15aeda58ccf07ac80830dbff7b75b9c68d5118d81ac0af2ba6494e0357872d45e9b3650444ac8303f4f90dece815a73fae796f651d14e
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SSDEEP
49152:BU3U+ZYmxjpv7x4GFM/+b8dTMNh9Wr73h7NXSWEqNJO5hYTVMCRisKEZePsw:BiU2YmxjpDx4Zo8dYNh9q73h7NXYkRiL
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 3384 rundll32mgr.exe 528 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/3384-7-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-10-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/528-27-0x0000000000400000-0x0000000000477000-memory.dmp upx behavioral2/memory/528-32-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-15-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-14-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-13-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-9-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/3384-8-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/528-41-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/528-40-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/528-42-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/528-43-0x0000000000400000-0x0000000000421000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\pxAF3B.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 2 IoCs
pid pid_target Process procid_target 3460 1256 WerFault.exe 83 3800 3940 WerFault.exe 89 -
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 Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" 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\LastUpdateHighDateTime = "31153298" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "442531240" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{D83F4823-C885-11EF-B9B6-FA89EA07D49F} = "0" 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\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Internet Explorer\VersionManager 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\GPU 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\VersionManager\LastCheckForUpdateHighDateTime = "31153298" 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\Recovery\AdminActive 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 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\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31153298" 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\Main\CompatibilityFlags = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2904871060" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2905026438" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2905026438" 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 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\VersionManager\LastUpdateLowDateTime = "2905026438" 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\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31153298" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" 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\DomainSuggestion\FileNames\ iexplore.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe 528 WaterMark.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 528 WaterMark.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1216 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1216 iexplore.exe 1216 iexplore.exe 1328 IEXPLORE.EXE 1328 IEXPLORE.EXE 1328 IEXPLORE.EXE 1328 IEXPLORE.EXE -
Suspicious use of UnmapMainImage 2 IoCs
pid Process 3384 rundll32mgr.exe 528 WaterMark.exe -
Suspicious use of WriteProcessMemory 25 IoCs
description pid Process procid_target PID 1364 wrote to memory of 1256 1364 rundll32.exe 83 PID 1364 wrote to memory of 1256 1364 rundll32.exe 83 PID 1364 wrote to memory of 1256 1364 rundll32.exe 83 PID 1256 wrote to memory of 3384 1256 rundll32.exe 84 PID 1256 wrote to memory of 3384 1256 rundll32.exe 84 PID 1256 wrote to memory of 3384 1256 rundll32.exe 84 PID 3384 wrote to memory of 528 3384 rundll32mgr.exe 86 PID 3384 wrote to memory of 528 3384 rundll32mgr.exe 86 PID 3384 wrote to memory of 528 3384 rundll32mgr.exe 86 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3940 528 WaterMark.exe 89 PID 528 wrote to memory of 3428 528 WaterMark.exe 92 PID 528 wrote to memory of 3428 528 WaterMark.exe 92 PID 528 wrote to memory of 1216 528 WaterMark.exe 93 PID 528 wrote to memory of 1216 528 WaterMark.exe 93 PID 1216 wrote to memory of 1328 1216 iexplore.exe 95 PID 1216 wrote to memory of 1328 1216 iexplore.exe 95 PID 1216 wrote to memory of 1328 1216 iexplore.exe 95
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\e5b5d03c205bb368c0c586670929f884dad76498581f0bd1d415df827614fdb9.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1364 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\e5b5d03c205bb368c0c586670929f884dad76498581f0bd1d415df827614fdb9.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1256 -
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:3384 -
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:528 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe5⤵PID:3940
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3940 -s 2046⤵
- Program crash
PID:3800
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
PID:3428
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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:1216 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1216 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1328
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1256 -s 6243⤵
- Program crash
PID:3460
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1256 -ip 12561⤵PID:1464
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3940 -ip 39401⤵PID:3512
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
356KB
MD5d1654649c5df79cd1df557b1f68c8b2d
SHA1f97eefb7de778ed3a2314dd1a679e79b80d1703f
SHA256954818df89575ea6024b38b35882aea05f19282dea9f19ae42cc5a9769561f77
SHA5120463cb66da8559b2cc7b76928e32a0e74ecfdc939bbbf93d5cca4015aafb0b19b9a4b1633717384fe01333a75d7afa2ba8bda92221c7a1e9a70d087adff0e2cf
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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
MD50d8b6da5a57da24c08bc663986a01b1e
SHA1aa428b861142f542b6c363fdc177c5d5884bac34
SHA25684a4e30a7d37b75e346adbd51d01f7251e00e647882e5e3b20830f4db96a7682
SHA5122c0ce153ad2d5ccf971a3eb38124b61b248c502097890176b89b6c524291e6961583a034790b1fe5078866140176a2b3b79858cec33f78024d4b7beba794d70e
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Filesize
15KB
MD51a545d0052b581fbb2ab4c52133846bc
SHA162f3266a9b9925cd6d98658b92adec673cbe3dd3
SHA256557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1
SHA512bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee