Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220718-en -
resource tags
arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system -
submitted
20-07-2022 01:05
Static task
static1
Behavioral task
behavioral1
Sample
7831fbc27706698871cb2076f52e32e7.dll
Resource
win7-20220718-en
Behavioral task
behavioral2
Sample
7831fbc27706698871cb2076f52e32e7.dll
Resource
win10v2004-20220718-en
General
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Target
7831fbc27706698871cb2076f52e32e7.dll
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Size
5.0MB
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MD5
7831fbc27706698871cb2076f52e32e7
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SHA1
473110b7e670cb6a3b7df0e603153b4fc47bcb4f
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SHA256
bcad6919d2edc3c51ba917a3348c39b5a7a5d0b2a5d3418977fcd475f6aeec20
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SHA512
ae1e555620d4d378120229db150331b2987268a6c53f641544b9b8a2a011d9f96b1321b648304f5a32cb707584114f033e60617c3b273b136bd42a36ff0f02d7
Malware Config
Signatures
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Wannacry
WannaCry is a ransomware cryptoworm.
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Contacts a large (3261) 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 3496 mssecsvr.exe 4776 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 Windows directory 2 IoCs
Processes:
mssecsvr.exerundll32.exedescription ioc process File created C:\WINDOWS\tasksche.exe mssecsvr.exe File created C:\WINDOWS\mssecsvr.exe rundll32.exe -
Modifies data under HKEY_USERS 5 IoCs
Processes:
mssecsvr.exedescription ioc process 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\ProxyBypass = "1" mssecsvr.exe 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\UNCAsIntranet = "1" mssecsvr.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" mssecsvr.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 5068 wrote to memory of 3212 5068 rundll32.exe rundll32.exe PID 5068 wrote to memory of 3212 5068 rundll32.exe rundll32.exe PID 5068 wrote to memory of 3212 5068 rundll32.exe rundll32.exe PID 3212 wrote to memory of 3496 3212 rundll32.exe mssecsvr.exe PID 3212 wrote to memory of 3496 3212 rundll32.exe mssecsvr.exe PID 3212 wrote to memory of 3496 3212 rundll32.exe mssecsvr.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\7831fbc27706698871cb2076f52e32e7.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:5068 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\7831fbc27706698871cb2076f52e32e7.dll,#12⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3212 -
C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3496
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C:\WINDOWS\mssecsvr.exeC:\WINDOWS\mssecsvr.exe -m security1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4776
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\WINDOWS\mssecsvr.exeFilesize
2.2MB
MD5e443f3ffe145795945411c0c1a4b0479
SHA1a4c44dbebd84d55ddcab70a1d9fe22c2ec875346
SHA256e97a21794fb4071da5751940f518819ec296aad6909384cf7ea734992b82872b
SHA512f913024e0783fd782669fff01c13c427b4b19c15671b0cc5f2a864477c1a0860a5d949ec9f9d57f9503adf97418b480094aaec84509160ab993fb0216630e370
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5e443f3ffe145795945411c0c1a4b0479
SHA1a4c44dbebd84d55ddcab70a1d9fe22c2ec875346
SHA256e97a21794fb4071da5751940f518819ec296aad6909384cf7ea734992b82872b
SHA512f913024e0783fd782669fff01c13c427b4b19c15671b0cc5f2a864477c1a0860a5d949ec9f9d57f9503adf97418b480094aaec84509160ab993fb0216630e370
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C:\Windows\mssecsvr.exeFilesize
2.2MB
MD5e443f3ffe145795945411c0c1a4b0479
SHA1a4c44dbebd84d55ddcab70a1d9fe22c2ec875346
SHA256e97a21794fb4071da5751940f518819ec296aad6909384cf7ea734992b82872b
SHA512f913024e0783fd782669fff01c13c427b4b19c15671b0cc5f2a864477c1a0860a5d949ec9f9d57f9503adf97418b480094aaec84509160ab993fb0216630e370
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memory/3212-130-0x0000000000000000-mapping.dmp
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memory/3496-131-0x0000000000000000-mapping.dmp