Analysis
- max time kernel
150s - max time network
153s - platform
windows7_x64 - resource
win7-20220718-en - resource tags
arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system - submitted
20/07/2022, 03:10
Static task
static1
Behavioral task
behavioral1
Sample
752fc35efbf506085effec3eab207f8c.dll
Resource
win7-20220718-en
windows7-x64
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
752fc35efbf506085effec3eab207f8c.dll
Resource
win10v2004-20220414-en
windows10-2004-x64
7 signatures
150 seconds
General
- Target 752fc35efbf506085effec3eab207f8c.dll
- Size 5.0MB
- Sample220720-dn241abhbj
- SHA256 cbb03a955d1f67c11be512805cc5d0201b14d71bef2d381fae902cfa7729319f
- MD5 752fc35efbf506085effec3eab207f8c
- SHA1 1638ef45caea208a350b6c77720a7224126ec6a4
- SHA512 24d576c16bd7c3c2d06aef635944198cfeede41cea8dcee1a2bea477bcde65ebd184b95f4cce2e68edfacf2e799d40f669acbd8696ba4bc21d632f0e35e5db90
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Signatures
- Wannacry
WannaCry is a ransomware cryptoworm.
- Contacts a large (1303) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
- Executes dropped EXE 2 IoCs
pid Process 892 mssecsvr.exe 1696 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 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\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecision = "0" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\aa-9a-b0-7d-5c-4f mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecisionReason = "1" 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 (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1" mssecsvr.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad mssecsvr.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadNetworkName = "Network 3" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecision = "0" 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 Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF} 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 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\Cookies\CachePrefix = "Cookie:" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00be000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecisionReason = "1" mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecisionTime = c0195202f79bd801 mssecsvr.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecisionTime = c0195202f79bd801 mssecsvr.exe - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1876 wrote to memory of 1036 1876 rundll32.exe 28 PID 1036 wrote to memory of 892 1036 rundll32.exe 29 PID 1036 wrote to memory of 892 1036 rundll32.exe 29 PID 1036 wrote to memory of 892 1036 rundll32.exe 29 PID 1036 wrote to memory of 892 1036 rundll32.exe 29
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\752fc35efbf506085effec3eab207f8c.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1876 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\752fc35efbf506085effec3eab207f8c.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1036 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:892
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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:1696
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\WINDOWS\mssecsvr.exe
- Size 2.2MB
- SHA256 bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3
- MD5 b88e1a8d12b1fb195a27ac9490411876
- SHA1 1d5c1fec976a77d049c55fd0a288f02209c96397
- SHA512 c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231
- SSDEEP 49152:QnaQqMSPbcBVQej/1INRx+TSqTdX1HkQp:QlqPoBhz1aRxcSUDk0
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\mssecsvr.exe
- Size 2.2MB
- SHA256 bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3
- MD5 b88e1a8d12b1fb195a27ac9490411876
- SHA1 1d5c1fec976a77d049c55fd0a288f02209c96397
- SHA512 c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231
- SSDEEP 49152:QnaQqMSPbcBVQej/1INRx+TSqTdX1HkQp:QlqPoBhz1aRxcSUDk0
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\mssecsvr.exe
- Size 2.2MB
- SHA256 bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3
- MD5 b88e1a8d12b1fb195a27ac9490411876
- SHA1 1d5c1fec976a77d049c55fd0a288f02209c96397
- SHA512 c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231
- SSDEEP 49152:QnaQqMSPbcBVQej/1INRx+TSqTdX1HkQp:QlqPoBhz1aRxcSUDk0
- MD5 SHA1 SHA512 SSDEEP