Analysis
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max time kernel
151s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
10-10-2022 04:26
Static task
static1
Behavioral task
behavioral1
Sample
fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll
Resource
win10v2004-20220812-en
General
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Target
fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll
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Size
5.0MB
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MD5
1e4a4f54b53b3f7dc1910eab98c1ddb5
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SHA1
d48ba36a7699596d169cab53165d0d69c3f3ab4f
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SHA256
fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9
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SHA512
804bea7c06739406c349ad66fbae311543e407a0992adb9d24dbbce6b28a91bb014903ae3807f1167858123fcfd232dc7c64387b807c384d42b803d97b21d359
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SSDEEP
49152:RnGMSPbcBVL1INRx+TSqTdX1HkQo6SAARdhnv:1GPoB91aRxcSUDk36SAEdhv
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (2655) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
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Executes dropped EXE 2 IoCs
Processes:
mssecsvr.exemssecsvr.exepid process 3788 mssecsvr.exe 1036 mssecsvr.exe -
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Drops file in Windows directory 2 IoCs
Processes:
rundll32.exemssecsvr.exedescription ioc process File created C:\WINDOWS\mssecsvr.exe rundll32.exe File created C:\WINDOWS\tasksche.exe mssecsvr.exe -
Modifies data under HKEY_USERS 12 IoCs
Processes:
mssecsvr.exedescription ioc process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion mssecsvr.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 4908 wrote to memory of 4696 4908 rundll32.exe rundll32.exe PID 4908 wrote to memory of 4696 4908 rundll32.exe rundll32.exe PID 4908 wrote to memory of 4696 4908 rundll32.exe rundll32.exe PID 4696 wrote to memory of 3788 4696 rundll32.exe mssecsvr.exe PID 4696 wrote to memory of 3788 4696 rundll32.exe mssecsvr.exe PID 4696 wrote to memory of 3788 4696 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
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C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe -m security1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\WINDOWS\mssecsvr.exeFilesize
2.2MB
MD5d6649cb748e4f5940595522ae491f5fe
SHA15199e158fab72c21127f6d0228832bee80502a40
SHA2563bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8
SHA51241568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5d6649cb748e4f5940595522ae491f5fe
SHA15199e158fab72c21127f6d0228832bee80502a40
SHA2563bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8
SHA51241568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5d6649cb748e4f5940595522ae491f5fe
SHA15199e158fab72c21127f6d0228832bee80502a40
SHA2563bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8
SHA51241568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967
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memory/3788-133-0x0000000000000000-mapping.dmp
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memory/4696-132-0x0000000000000000-mapping.dmp