Analysis
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max time kernel
120s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
25-03-2024 07:09
Static task
static1
Behavioral task
behavioral1
Sample
ce223b231f2862124386c585e9b95ca1.dll
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
ce223b231f2862124386c585e9b95ca1.dll
Resource
win10v2004-20240226-en
General
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Target
ce223b231f2862124386c585e9b95ca1.dll
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Size
5.0MB
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MD5
ce223b231f2862124386c585e9b95ca1
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SHA1
61673e2be7e3479a818eb98339692bc7e4a5b79c
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SHA256
92bc02116a72b13d359ba88e0984ea09d2eb230fbf711d92a0c961e08274a09e
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SHA512
dede42923cae7167fcff56ae1131e6cb5a9c8ef14d76d1be84211504685d628fa1abf658a7ec89d0bca976c35ef6eb58f93e4f59ffcc4c27468e3e44c0ac4faa
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SSDEEP
12288:TQbLgmluyQhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHeQYSUjEXF5:MbLguVQhfdmMSirYbcMNgef0QeQjG
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (2487) 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 2984 mssecsvr.exe 2532 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 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 (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0070000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233}\WpadNetworkName = "Network 3" 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\Cookies\CachePrefix = "Cookie:" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\86-39-08-5e-fe-48 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\86-39-08-5e-fe-48\WpadDecisionReason = "1" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\86-39-08-5e-fe-48\WpadDecision = "0" 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 Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\86-39-08-5e-fe-48\WpadDecisionTime = b0b4b26d847eda01 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233} mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233}\WpadDecisionReason = "1" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233}\WpadDecisionTime = b0b4b26d847eda01 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233}\WpadDecision = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F4A37A0A-5FD0-4FE2-8F71-D8F94CFBD233}\86-39-08-5e-fe-48 mssecsvr.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2664 wrote to memory of 2960 2664 rundll32.exe rundll32.exe PID 2960 wrote to memory of 2984 2960 rundll32.exe mssecsvr.exe PID 2960 wrote to memory of 2984 2960 rundll32.exe mssecsvr.exe PID 2960 wrote to memory of 2984 2960 rundll32.exe mssecsvr.exe PID 2960 wrote to memory of 2984 2960 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\ce223b231f2862124386c585e9b95ca1.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2664 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\ce223b231f2862124386c585e9b95ca1.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2960 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2984
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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:2532
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2.2MB
MD560a91a498c0f1ffddef484c5a4d42564
SHA1a15dcd408c0aee1f5f38b50528583bdee6536227
SHA25603dc66c9970481c5958d247f9eba93a6a7ad9f9bbf94845b9fbea8ed1e1e0757
SHA512e7b7a308227fc3c72d8d1bd262389257e1f2fa419f6ceff58f73a06f850245f6e1068ea74cf42388ee2ca2712d7b5d9a2ce0e6f7264c3885b82c1caa70891e55