Analysis
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max time kernel
1050s -
max time network
1051s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
30-04-2024 20:23
Static task
static1
Behavioral task
behavioral1
Sample
0a4feee460de315add852f5c5d3bd316_JaffaCakes118.dll
Resource
win10v2004-20240426-en
General
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Target
0a4feee460de315add852f5c5d3bd316_JaffaCakes118.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
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SSDEEP
49152:RnGMSPbcBVQej/1INRx+TSqTdX1HkQo6SEdhnv:1GPoBhz1aRxcSUDk36SEdhv
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (24663) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
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Creates a large amount of network flows 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 3576 mssecsvr.exe 1436 mssecsvr.exe -
Drops file in System32 directory 4 IoCs
Processes:
mssecsvr.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 mssecsvr.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE mssecsvr.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies mssecsvr.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 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 15 IoCs
Processes:
mssecsvr.exedescription ioc process Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "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 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History 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\ZoneMap\ mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft mssecsvr.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 1052 wrote to memory of 2396 1052 rundll32.exe rundll32.exe PID 1052 wrote to memory of 2396 1052 rundll32.exe rundll32.exe PID 1052 wrote to memory of 2396 1052 rundll32.exe rundll32.exe PID 2396 wrote to memory of 3576 2396 rundll32.exe mssecsvr.exe PID 2396 wrote to memory of 3576 2396 rundll32.exe mssecsvr.exe PID 2396 wrote to memory of 3576 2396 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\0a4feee460de315add852f5c5d3bd316_JaffaCakes118.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1052 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\0a4feee460de315add852f5c5d3bd316_JaffaCakes118.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2396 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3576
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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
PID:1436
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5d5980ad3a5f1f29aeb03b00f96c16764
SHA1c11b100c7e7d5b6e9507c56dc4d14f68d49d5f4e
SHA2566a71f500e36dc06053e780860800d8552177effbf23b93c0a8ec7c48f2596fd4
SHA512e741529c3a11d24997d8b0c4e5368c46110a25774e798cc1fbe50ce76b6dbfd2c9d1fdfa0a9a91cbd49337f05a4f761466545cae8466139bc3bb1bef17d4247a