wannacry | 9782298315b127534cfb24720e76e4cc946f71a72126da11f9bcb738b94d6b49

General

Target

9d2833555fc41bce3dace0a1b327102d.dll
Size

5.0MB
MD5

9d2833555fc41bce3dace0a1b327102d
SHA1

1d6566dd33f8fed825e75f230155f2adb1a1e4d3
SHA256

9782298315b127534cfb24720e76e4cc946f71a72126da11f9bcb738b94d6b49
SHA512

3ce4ccead3e7de1c565c592e130f205dbddc380b66e7865442aea9400a17d8d52d435ed43aa4342badca26acb3bc42f27e9cecfa5207e781ad8e82a65b9d7c0c

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1212) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1948 mssecsvr.exe
948 mssecsvr.exe

pid	process
1948	mssecsvr.exe
948	mssecsvr.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvr.exe

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

Processes:

rundll32.exemssecsvr.exe

description ioc process

File created C:\WINDOWS\mssecsvr.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvr.exe

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

Processes:

mssecsvr.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}\46-b6-0d-ab-9a-20	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 (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
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\46-b6-0d-ab-9a-20	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	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\UNCAsIntranet = "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	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c5000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}\WpadDecisionTime = 30d8fbaff89bd801	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\Wpad\46-b6-0d-ab-9a-20\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\46-b6-0d-ab-9a-20\WpadDecisionTime = 30d8fbaff89bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}\WpadNetworkName = "Network 3"	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\{5AB3EC69-37C3-4F68-A950-A93EE4D75C8E}\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\46-b6-0d-ab-9a-20\WpadDecision = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1660 wrote to memory of 1876	1660	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1948	1876	rundll32.exe	mssecsvr.exe
PID 1876 wrote to memory of 1948	1876	rundll32.exe	mssecsvr.exe
PID 1876 wrote to memory of 1948	1876	rundll32.exe	mssecsvr.exe
PID 1876 wrote to memory of 1948	1876	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d2833555fc41bce3dace0a1b327102d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1660

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9d2833555fc41bce3dace0a1b327102d.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1876

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1948

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
2.2MB

MD5
f991c2a04bfec216342e47bf4ec80568

SHA1
8050130e18661d06083fefe5ca170cb5cab40615

SHA256
1686c09b344a6d2d52a6cfc62edc527174f1fedc70d24cbef04025c72aba369d

SHA512
dad456d37c6fddb66189307ae29af230b8ea52061a0af0c74af4d12e27ab97e17930af594d1241202f55d51244d0be7ea0d0c67110fdceed78fbe0ef4ecb568b

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
f991c2a04bfec216342e47bf4ec80568

SHA1
8050130e18661d06083fefe5ca170cb5cab40615

SHA256
1686c09b344a6d2d52a6cfc62edc527174f1fedc70d24cbef04025c72aba369d

SHA512
dad456d37c6fddb66189307ae29af230b8ea52061a0af0c74af4d12e27ab97e17930af594d1241202f55d51244d0be7ea0d0c67110fdceed78fbe0ef4ecb568b

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
f991c2a04bfec216342e47bf4ec80568

SHA1
8050130e18661d06083fefe5ca170cb5cab40615

SHA256
1686c09b344a6d2d52a6cfc62edc527174f1fedc70d24cbef04025c72aba369d

SHA512
dad456d37c6fddb66189307ae29af230b8ea52061a0af0c74af4d12e27ab97e17930af594d1241202f55d51244d0be7ea0d0c67110fdceed78fbe0ef4ecb568b

Download Submit
memory/1876-54-0x0000000000000000-mapping.dmp

Download
memory/1876-55-0x00000000756C1000-0x00000000756C3000-memory.dmp

Filesize
8KB

Download
memory/1948-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads