wannacry | 09e6086b3be2835f471faf4bfdb9621392bade4ab32b6115a81adf722d6f5e10

General

Target

5fc475dfe7208fedcf1e88c865306999.dll
Size

5.0MB
MD5

5fc475dfe7208fedcf1e88c865306999
SHA1

537d2c5ffd3d7695ba8a8fef7d7d89c006db9ccc
SHA256

09e6086b3be2835f471faf4bfdb9621392bade4ab32b6115a81adf722d6f5e10
SHA512

0627e503a34e182a1fe4e20cc8855a21f0ecfa032440753a47ebdb2023dbaa70be987b2123c9886109bd7f5f4e168c5a55045744df6c7e4aeb0a385c83a65ec7

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1327) 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:

mssecsvc.exemssecsvc.exe

pid process

740 mssecsvc.exe
1756 mssecsvc.exe

pid	process
740	mssecsvc.exe
1756	mssecsvc.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

mssecsvc.exerundll32.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00f5000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}\WpadDecisionTime = 0097f8e0dc9bd801	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fa-91-c0-77-11-18\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fa-91-c0-77-11-18	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{66112E0E-DB0D-4FEF-A0FA-CE28295B1DC4}\fa-91-c0-77-11-18	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fa-91-c0-77-11-18\WpadDecisionTime = 0097f8e0dc9bd801	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fa-91-c0-77-11-18\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 1876	1972	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 740	1876	rundll32.exe	mssecsvc.exe
PID 1876 wrote to memory of 740	1876	rundll32.exe	mssecsvc.exe
PID 1876 wrote to memory of 740	1876	rundll32.exe	mssecsvc.exe
PID 1876 wrote to memory of 740	1876	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5fc475dfe7208fedcf1e88c865306999.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5fc475dfe7208fedcf1e88c865306999.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1876

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:740

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1756

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

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe

Filesize
2.2MB

MD5
b3291ee8c7bc73ac2c00a62294008a3f

SHA1
7ca4c0311e5fba6f3672d67a143f07645e27fc0a

SHA256
ee03deeafa4fbdf8aee595639384c7e094817748ad7dde0c724f9fca298b9372

SHA512
11a412f91f75ed24a8816fda97af86c43e57e326d5d7bc1985c2c5e3f913d086a9ce1bee623b4e28bc30b05cad822a00ee06f2172eb010c080267140e0aa4662

Download Submit
C:\Windows\mssecsvc.exe

Filesize
2.2MB

MD5
b3291ee8c7bc73ac2c00a62294008a3f

SHA1
7ca4c0311e5fba6f3672d67a143f07645e27fc0a

SHA256
ee03deeafa4fbdf8aee595639384c7e094817748ad7dde0c724f9fca298b9372

SHA512
11a412f91f75ed24a8816fda97af86c43e57e326d5d7bc1985c2c5e3f913d086a9ce1bee623b4e28bc30b05cad822a00ee06f2172eb010c080267140e0aa4662

Download Submit
C:\Windows\mssecsvc.exe

Filesize
2.2MB

MD5
b3291ee8c7bc73ac2c00a62294008a3f

SHA1
7ca4c0311e5fba6f3672d67a143f07645e27fc0a

SHA256
ee03deeafa4fbdf8aee595639384c7e094817748ad7dde0c724f9fca298b9372

SHA512
11a412f91f75ed24a8816fda97af86c43e57e326d5d7bc1985c2c5e3f913d086a9ce1bee623b4e28bc30b05cad822a00ee06f2172eb010c080267140e0aa4662

Download Submit
memory/740-56-0x0000000000000000-mapping.dmp

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

Download
memory/1876-55-0x0000000074F71000-0x0000000074F73000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads