Analysis
- max time kernel
151s - max time network
162s - platform
windows7_x64 - resource
win7-20220718-en - resource tags
arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system - submitted
20/07/2022, 02:27
Static task
static1
Behavioral task
behavioral1
Sample
64831891366685c257a9f71a83830166.dll
Resource
win7-20220718-en
windows7-x64
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
64831891366685c257a9f71a83830166.dll
Resource
win10v2004-20220414-en
windows10-2004-x64
7 signatures
150 seconds
General
- Target 64831891366685c257a9f71a83830166.dll
- Size 5.0MB
- Sample220720-cxffxsbehp
- SHA256 b98ea070bdf32968bc3784bf3847019c0fa559c0c230a9b9bf15360dc6f413f3
- MD5 64831891366685c257a9f71a83830166
- SHA1 b11969f7f94c9761fbc77d0069c55f8e01cccdd8
- SHA512 68f60ca07a472bac1f8e17557e2d7edbf06f4df0ff2f293319926c416b80ba61fa07e7f7830a6a2c1bb8d455157bcdddef80941e5add5330b6bb487f4a3ded43
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Signatures
- Wannacry
WannaCry is a ransomware cryptoworm.
- Contacts a large (1227) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
- Executes dropped EXE 2 IoCs
pid Process 624 mssecsvr.exe 1720 mssecsvr.exe - Drops file in System32 directory 1 IoCs
description 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
description 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
description ioc Process Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 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\History\CachePrefix = "Visited:" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-23-c3-8c-41-59 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 (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\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8}\WpadDecision = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8}\26-23-c3-8c-41-59 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-23-c3-8c-41-59\WpadDecisionTime = b0c12e07f19bd801 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00bb000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-23-c3-8c-41-59\WpadDecision = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings 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\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8}\WpadDecisionTime = b0c12e07f19bd801 mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8} mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8}\WpadDecisionReason = "1" mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{53AD3FDE-7298-4E50-9853-0162DA26E8F8}\WpadNetworkName = "Network 3" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-23-c3-8c-41-59\WpadDecisionReason = "1" 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\Cookies\CachePrefix = "Cookie:" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad mssecsvr.exe - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1764 wrote to memory of 1460 1764 rundll32.exe 17 PID 1460 wrote to memory of 624 1460 rundll32.exe 24 PID 1460 wrote to memory of 624 1460 rundll32.exe 24 PID 1460 wrote to memory of 624 1460 rundll32.exe 24 PID 1460 wrote to memory of 624 1460 rundll32.exe 24
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\64831891366685c257a9f71a83830166.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1764 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\64831891366685c257a9f71a83830166.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1460 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:624
-
-
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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:1720
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\WINDOWS\mssecsvr.exe
- Size 2.2MB
- SHA256 736d89cef218e0cf69a5e27431eeefe95f8981ddec23f7103ca1551adfa570b3
- MD5 f22e0d67f6223a1a3b6757c0825f3729
- SHA1 80f0df615b32e684dfe3750432e0a1401ff4efe0
- SHA512 c7073c1f388474b023cf4f5b030c7219e375ef8c31d60e435f577f6658836f7120d878c80bfe10428481945ccdf91a7c3f3fc44164b659cd943698626373311a
- SSDEEP 49152:VnFQqMSPbcBVQejl1INRx+TSqTdX1HkQo6SAARdhnvn:ZeqPoBhh1aRxcSUDk36SAEdhvn
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\mssecsvr.exe
- Size 2.2MB
- SHA256 736d89cef218e0cf69a5e27431eeefe95f8981ddec23f7103ca1551adfa570b3
- MD5 f22e0d67f6223a1a3b6757c0825f3729
- SHA1 80f0df615b32e684dfe3750432e0a1401ff4efe0
- SHA512 c7073c1f388474b023cf4f5b030c7219e375ef8c31d60e435f577f6658836f7120d878c80bfe10428481945ccdf91a7c3f3fc44164b659cd943698626373311a
- SSDEEP 49152:VnFQqMSPbcBVQejl1INRx+TSqTdX1HkQo6SAARdhnvn:ZeqPoBhh1aRxcSUDk36SAEdhvn
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\mssecsvr.exe
- Size 2.2MB
- SHA256 736d89cef218e0cf69a5e27431eeefe95f8981ddec23f7103ca1551adfa570b3
- MD5 f22e0d67f6223a1a3b6757c0825f3729
- SHA1 80f0df615b32e684dfe3750432e0a1401ff4efe0
- SHA512 c7073c1f388474b023cf4f5b030c7219e375ef8c31d60e435f577f6658836f7120d878c80bfe10428481945ccdf91a7c3f3fc44164b659cd943698626373311a
- SSDEEP 49152:VnFQqMSPbcBVQejl1INRx+TSqTdX1HkQo6SAARdhnvn:ZeqPoBhh1aRxcSUDk36SAEdhvn
- MD5 SHA1 SHA512 SSDEEP