wannacry | d079f3fcf18687fb745b25e5e4156f9d5e91ebb7bd5566782285a6685d96e1d6

General

Target

aaa3cc4e9a44e2b818fdbdc7b237e448.dll
Size

5.0MB
MD5

aaa3cc4e9a44e2b818fdbdc7b237e448
SHA1

d6e52fa61b42df2c2089eeb851744bbd87cacd84
SHA256

d079f3fcf18687fb745b25e5e4156f9d5e91ebb7bd5566782285a6685d96e1d6
SHA512

1d4160f21a9de75e48c8b0b64885269385e1c0a3b2bee1d3af2307a3f51d0c4ef8dce86cb59b03544fed5f7c1db41203744c8946349da4ad3b2f831b36ad6c22

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1298) 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

1964 mssecsvr.exe
1712 mssecsvr.exe

pid	process
1964	mssecsvr.exe
1712	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\76-c7-1a-46-0c-c4\WpadDecisionTime = a04c2aa8e89bd801	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 (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\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}\WpadDecisionTime = a04c2aa8e89bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}\76-c7-1a-46-0c-c4	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\76-c7-1a-46-0c-c4\WpadDecisionReason = "1"	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\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c7000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\76-c7-1a-46-0c-c4	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\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\76-c7-1a-46-0c-c4\WpadDecision = "0"	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\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0916F404-CB4C-4236-B527-B9986B804060}\WpadDecisionReason = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1988	1816	rundll32.exe	rundll32.exe
PID 1988 wrote to memory of 1964	1988	rundll32.exe	mssecsvr.exe
PID 1988 wrote to memory of 1964	1988	rundll32.exe	mssecsvr.exe
PID 1988 wrote to memory of 1964	1988	rundll32.exe	mssecsvr.exe
PID 1988 wrote to memory of 1964	1988	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aaa3cc4e9a44e2b818fdbdc7b237e448.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1816

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aaa3cc4e9a44e2b818fdbdc7b237e448.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1988

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1964

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:1712

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
f1370fa7d71c2db043ad3dcba0a76e16

SHA1
9009af8cd1245b3dc0af7f055d6940fab0af2b61

SHA256
49822eb4ff6ba6d158907d0a93f53eef3d73fa3b9fe86af0b17f6ed6f622cd7d

SHA512
440511b851a7fa8299481f8efe117e7eb2d8f4c7d3ae49fc4751b41a84270d13f3e3c7cd35d31fdacee7f4db1fbcf64db77fcc11872d190adbda86f3c3bc69d4

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
f1370fa7d71c2db043ad3dcba0a76e16

SHA1
9009af8cd1245b3dc0af7f055d6940fab0af2b61

SHA256
49822eb4ff6ba6d158907d0a93f53eef3d73fa3b9fe86af0b17f6ed6f622cd7d

SHA512
440511b851a7fa8299481f8efe117e7eb2d8f4c7d3ae49fc4751b41a84270d13f3e3c7cd35d31fdacee7f4db1fbcf64db77fcc11872d190adbda86f3c3bc69d4

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
f1370fa7d71c2db043ad3dcba0a76e16

SHA1
9009af8cd1245b3dc0af7f055d6940fab0af2b61

SHA256
49822eb4ff6ba6d158907d0a93f53eef3d73fa3b9fe86af0b17f6ed6f622cd7d

SHA512
440511b851a7fa8299481f8efe117e7eb2d8f4c7d3ae49fc4751b41a84270d13f3e3c7cd35d31fdacee7f4db1fbcf64db77fcc11872d190adbda86f3c3bc69d4

Download Submit
memory/1964-56-0x0000000000000000-mapping.dmp

Download
memory/1988-54-0x0000000000000000-mapping.dmp

Download
memory/1988-55-0x0000000076091000-0x0000000076093000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads