wannacry | 6420ae820a10cee7861431a1a69aeeeb4d42dba4280b0219a2be101a423eb4cf

General

Target

20193d9b262e6a2f296073ea0855fed4.dll
Size

5.0MB
MD5

20193d9b262e6a2f296073ea0855fed4
SHA1

f9f91e60280841308449b5f892fda0f4b5bbda3c
SHA256

6420ae820a10cee7861431a1a69aeeeb4d42dba4280b0219a2be101a423eb4cf
SHA512

b8f693a40fa17a0f0a87c3ae8207704dd0a724b52f44553161cf4e3fa83c2e89f4e0e55c402fe4b4246492bf645de30ae1ff1b160dc7a055e43abcb574677991

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1180) 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

1888 mssecsvr.exe
2000 mssecsvr.exe

pid	process
1888	mssecsvr.exe
2000	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
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\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00ca000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecisionTime = 80682198f69bd801	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\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\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\3a-5c-1d-0c-23-5f	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\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecisionTime = 80682198f69bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecision = "0"	mssecsvr.exe
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	mssecsvr.exe
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\Content\CachePrefix	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecisionReason = "1"	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\Connections	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1436	1200	rundll32.exe	rundll32.exe
PID 1436 wrote to memory of 1888	1436	rundll32.exe	mssecsvr.exe
PID 1436 wrote to memory of 1888	1436	rundll32.exe	mssecsvr.exe
PID 1436 wrote to memory of 1888	1436	rundll32.exe	mssecsvr.exe
PID 1436 wrote to memory of 1888	1436	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\20193d9b262e6a2f296073ea0855fed4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1200

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\20193d9b262e6a2f296073ea0855fed4.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1436

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1888

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:2000

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
193c96072c7a1ebf2bf8b012aca6bc54

SHA1
c082afb424fac4fef094d5ea5b824c1e7dfa9343

SHA256
68c619f094bf8754e606a0b884f9a2b64388c22501946d21245931f8953d01f8

SHA512
611bee64c679dedb0ed6f7306c2e2e4e7f09c9e4ec6ca09ae8731df2bcd398dd9e87b63504a4bee7777add752ba0b00fc2feef52c7395a8a2495f2d52e80e630

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
193c96072c7a1ebf2bf8b012aca6bc54

SHA1
c082afb424fac4fef094d5ea5b824c1e7dfa9343

SHA256
68c619f094bf8754e606a0b884f9a2b64388c22501946d21245931f8953d01f8

SHA512
611bee64c679dedb0ed6f7306c2e2e4e7f09c9e4ec6ca09ae8731df2bcd398dd9e87b63504a4bee7777add752ba0b00fc2feef52c7395a8a2495f2d52e80e630

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
193c96072c7a1ebf2bf8b012aca6bc54

SHA1
c082afb424fac4fef094d5ea5b824c1e7dfa9343

SHA256
68c619f094bf8754e606a0b884f9a2b64388c22501946d21245931f8953d01f8

SHA512
611bee64c679dedb0ed6f7306c2e2e4e7f09c9e4ec6ca09ae8731df2bcd398dd9e87b63504a4bee7777add752ba0b00fc2feef52c7395a8a2495f2d52e80e630

Download Submit
memory/1436-54-0x0000000000000000-mapping.dmp

Download
memory/1436-55-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/1888-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads