Analysis
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max time kernel
152s -
max time network
159s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
07-07-2022 18:12
Static task
static1
Behavioral task
behavioral1
Sample
44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5.dll
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5.dll
Resource
win10v2004-20220414-en
General
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Target
44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5.dll
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Size
5.0MB
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MD5
0a4feee460de315add852f5c5d3bd316
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SHA1
d2cfb3eb68a16a60270f6e0d3abf24e49a658bee
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SHA256
44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5
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SHA512
c837c5f0f1dba596c8b0985074f9d7cdb3120435cb909314b0eb9dd7981b14e22ce3483cdc336438e3653ef93e74a90f8698af6edb9c772c90a4cca18fa78f8b
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (1127) 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 2020 mssecsvr.exe 1944 mssecsvr.exe -
Drops file in System32 directory 1 IoCs
Processes:
mssecsvr.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat mssecsvr.exe -
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 24 IoCs
Processes:
mssecsvr.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D}\WpadDecision = "0" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D} mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-2d-5e-eb-2d-b2\WpadDecision = "0" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix 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 = "0" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f006e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D}\WpadDecisionReason = "1" 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\Connections 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\Wpad\52-2d-5e-eb-2d-b2 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D}\52-2d-5e-eb-2d-b2 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-2d-5e-eb-2d-b2\WpadDecisionTime = 6070f8e44492d801 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D}\WpadDecisionTime = 6070f8e44492d801 mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{76CEA874-0BE9-479D-9AFA-A8DFDC8D773D}\WpadNetworkName = "Network 3" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-2d-5e-eb-2d-b2\WpadDecisionReason = "1" mssecsvr.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1624 wrote to memory of 1896 1624 rundll32.exe rundll32.exe PID 1896 wrote to memory of 2020 1896 rundll32.exe mssecsvr.exe PID 1896 wrote to memory of 2020 1896 rundll32.exe mssecsvr.exe PID 1896 wrote to memory of 2020 1896 rundll32.exe mssecsvr.exe PID 1896 wrote to memory of 2020 1896 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\44c86f0d16115be47c595f957cbb5da5361a84944b6b495120f4e75aa8d1b6c5.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
- Drops file in System32 directory
- 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
MD5d5980ad3a5f1f29aeb03b00f96c16764
SHA1c11b100c7e7d5b6e9507c56dc4d14f68d49d5f4e
SHA2566a71f500e36dc06053e780860800d8552177effbf23b93c0a8ec7c48f2596fd4
SHA512e741529c3a11d24997d8b0c4e5368c46110a25774e798cc1fbe50ce76b6dbfd2c9d1fdfa0a9a91cbd49337f05a4f761466545cae8466139bc3bb1bef17d4247a
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5d5980ad3a5f1f29aeb03b00f96c16764
SHA1c11b100c7e7d5b6e9507c56dc4d14f68d49d5f4e
SHA2566a71f500e36dc06053e780860800d8552177effbf23b93c0a8ec7c48f2596fd4
SHA512e741529c3a11d24997d8b0c4e5368c46110a25774e798cc1fbe50ce76b6dbfd2c9d1fdfa0a9a91cbd49337f05a4f761466545cae8466139bc3bb1bef17d4247a
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5d5980ad3a5f1f29aeb03b00f96c16764
SHA1c11b100c7e7d5b6e9507c56dc4d14f68d49d5f4e
SHA2566a71f500e36dc06053e780860800d8552177effbf23b93c0a8ec7c48f2596fd4
SHA512e741529c3a11d24997d8b0c4e5368c46110a25774e798cc1fbe50ce76b6dbfd2c9d1fdfa0a9a91cbd49337f05a4f761466545cae8466139bc3bb1bef17d4247a
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memory/1896-54-0x0000000000000000-mapping.dmp
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memory/1896-55-0x0000000076391000-0x0000000076393000-memory.dmpFilesize
8KB
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memory/2020-56-0x0000000000000000-mapping.dmp