Analysis
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max time kernel
150s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
03-06-2024 13:18
Static task
static1
Behavioral task
behavioral1
Sample
91ecf5beae030804c75c8dc485de5065_JaffaCakes118.dll
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
91ecf5beae030804c75c8dc485de5065_JaffaCakes118.dll
Resource
win10v2004-20240226-en
General
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Target
91ecf5beae030804c75c8dc485de5065_JaffaCakes118.dll
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Size
5.0MB
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MD5
91ecf5beae030804c75c8dc485de5065
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SHA1
c83f093fb16282d9ce931187215e191dd147ead7
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SHA256
f6eaf849d6c474c5db695fa04bce7d4393771f3ae0a1862ada36ce7790395f67
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SHA512
4a38b5f2d8680dc88159241c0a1fb5c59df5eaab8b6fd482ea9cb45f9ae335fc85b25d539e409fd2e8b1cfa6bc96a1dc06cde87ef2b6652ca715bc9ccaa3f8f4
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SSDEEP
49152:RnsEMSPbcBVQejXx+TSqTdX1HkQo6SAARdhnv:1fPoBhDxcSUDk36SAEdhv
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (3169) 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 2520 mssecsvr.exe 2648 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 System32 directory 5 IoCs
Processes:
mssecsvr.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\RD4QAON1.txt mssecsvr.exe File created C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\30ZHNMWK.txt mssecsvr.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\30ZHNMWK.txt mssecsvr.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat mssecsvr.exe File created C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\RD4QAON1.txt 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\8e-25-47-96-8f-13 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30}\8e-25-47-96-8f-13 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30}\WpadDecisionReason = "1" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30}\WpadDecisionTime = c04f0195b8b5da01 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30}\WpadDecision = "0" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30}\WpadNetworkName = "Network 3" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B510C714-0045-48B5-B1EF-713DAE6A7B30} mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-25-47-96-8f-13\WpadDecisionReason = "1" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-25-47-96-8f-13\WpadDecision = "0" 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\ZoneMap\ 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 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00e9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-25-47-96-8f-13\WpadDecisionTime = c04f0195b8b5da01 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings 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 (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1" mssecsvr.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 2808 wrote to memory of 3048 2808 rundll32.exe rundll32.exe PID 3048 wrote to memory of 2520 3048 rundll32.exe mssecsvr.exe PID 3048 wrote to memory of 2520 3048 rundll32.exe mssecsvr.exe PID 3048 wrote to memory of 2520 3048 rundll32.exe mssecsvr.exe PID 3048 wrote to memory of 2520 3048 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\91ecf5beae030804c75c8dc485de5065_JaffaCakes118.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2808 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\91ecf5beae030804c75c8dc485de5065_JaffaCakes118.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3048 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2520
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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:2648
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD594538b9192b982c496686e20435a7399
SHA139957f0668b03aadf84cb52926a519b817174e74
SHA2562e23030193830b490ca5af4f030a5ea8c227162c1e5a5a22c6ebe198a78d647f
SHA512988d223361cea485b872c4599fb51437bba9d6fbebd14ce156daf2d9ebfa5596c299165168398e118bdd0a5620913c0fa7173d13b487644d805d1cfd8ccedc22