Analysis
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max time kernel
137s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
26-10-2024 03:33
Static task
static1
Behavioral task
behavioral1
Sample
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll
Resource
win7-20240903-en
General
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Target
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll
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Size
879KB
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MD5
a8f7c07bb05fa504247aaeb462c441b3
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SHA1
3c43fc52e5781e85b58092fe48959ffb24e019d2
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SHA256
d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62
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SHA512
b966f4f6f4a617e9f9ca9595b076ed104861f40cb42da813f1ad2cd8c5c018821dafecda8f9ad80e1fd711edf42905c45926d8bc8cc541a6071fb4f1c986b2c8
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SSDEEP
12288:UNIyZN4+Wv4PLq6Okrh9ZN/hs9Dsdt+SrQtw7:U9TPmirh9Zdh6vS6q
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 2 IoCs
pid Process 2500 rundll32mgr.exe 1040 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/2500-6-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-7-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-14-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-15-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-13-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-11-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/2500-8-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1040-26-0x0000000000400000-0x0000000000454000-memory.dmp upx behavioral2/memory/1040-29-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1040-38-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1040-37-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1040-40-0x0000000000400000-0x0000000000421000-memory.dmp upx behavioral2/memory/1040-41-0x0000000000400000-0x0000000000421000-memory.dmp upx -
Drops file in Program Files directory 3 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft\px7DFA.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 4952 4888 WerFault.exe 84 4064 3620 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 (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "4105436886" IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "4101217820" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31139671" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "4101217820" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{2002EC2B-934B-11EF-9361-DA61A5E71E4E} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31139671" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31139671" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "436678609" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\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-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe 1040 WaterMark.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1040 WaterMark.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1012 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1012 iexplore.exe 1012 iexplore.exe 2248 IEXPLORE.EXE 2248 IEXPLORE.EXE 2248 IEXPLORE.EXE 2248 IEXPLORE.EXE -
Suspicious use of UnmapMainImage 2 IoCs
pid Process 2500 rundll32mgr.exe 1040 WaterMark.exe -
Suspicious use of WriteProcessMemory 25 IoCs
description pid Process procid_target PID 1896 wrote to memory of 4888 1896 rundll32.exe 84 PID 1896 wrote to memory of 4888 1896 rundll32.exe 84 PID 1896 wrote to memory of 4888 1896 rundll32.exe 84 PID 4888 wrote to memory of 2500 4888 rundll32.exe 85 PID 4888 wrote to memory of 2500 4888 rundll32.exe 85 PID 4888 wrote to memory of 2500 4888 rundll32.exe 85 PID 2500 wrote to memory of 1040 2500 rundll32mgr.exe 88 PID 2500 wrote to memory of 1040 2500 rundll32mgr.exe 88 PID 2500 wrote to memory of 1040 2500 rundll32mgr.exe 88 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 3620 1040 WaterMark.exe 89 PID 1040 wrote to memory of 1012 1040 WaterMark.exe 99 PID 1040 wrote to memory of 1012 1040 WaterMark.exe 99 PID 1040 wrote to memory of 2740 1040 WaterMark.exe 100 PID 1040 wrote to memory of 2740 1040 WaterMark.exe 100 PID 1012 wrote to memory of 2248 1012 iexplore.exe 101 PID 1012 wrote to memory of 2248 1012 iexplore.exe 101 PID 1012 wrote to memory of 2248 1012 iexplore.exe 101
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1896 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d540c15e87f5ef91de29ed9d6c3c830ec610873d9c7fb874777d62f554178c62.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4888 -
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:2500 -
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:1040 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\system32\svchost.exe5⤵PID:3620
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3620 -s 2046⤵
- Program crash
PID:4064
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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:1012 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1012 CREDAT:17410 /prefetch:26⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:2248
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"5⤵
- Modifies Internet Explorer settings
PID:2740
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4888 -s 6083⤵
- Program crash
PID:4952
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4888 -ip 48881⤵PID:4856
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3620 -ip 36201⤵PID:5032
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
MD5b51a34b2a0f62df2579b658491034a47
SHA1201b665bf031e09ab3ee4f8839725cee151921da
SHA25648994f82409a33bdb76107cc373fd893a89d61d61f668b0222eb440837c2c0e8
SHA512fe8b9dc3d4cc09282dfc64a284ebab6e10f40c0d5ba7dcb551531b8e1fddb09763f94dc009352480aa64d991a6db1a8766eed16d98867eb01ee940bf983ccfde
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD5bb1684fda35d7a1239a7a80c58a1d53f
SHA1ab09ad3798314eab972657feb0c04e1410c28874
SHA256d0701f4174731a6cd1cb0a212ad650b3368b6297afa02b42f3d187ebefa6701f
SHA51281e8a0a60b5d9c2612f58549cd008bd5f7af3ca5e3b55a6f7be04a6b1a1608d4e391cf09967dd38bdf343de59b73550e6f7199e21669288d6a646c332d3fb44c
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
293KB
MD5b913d0bea98b4e215fc9c9c0fb4bd351
SHA1bc6a89a2895bff53c0e80ef390ffaf022e38dc86
SHA2569621bb5921c596eb5246df3b5d59d3be598b4ef2d92dbf19a25c8f66cee9f2f9
SHA5123739ab8eeeea6d3759fa519e0c095b357e7044551a0e743cbf63b70e991bd9c52d4c6bd322cb6126d014ac85e07b081ef57591935b3225c9a30db0f3866f275b