wannacry | eedd33dfe6084c4fb8ff22594c5b4e6c35ff76170efa2caf12556a3ae427bf7f

General

Target

07813c26f199fef5b9963f31c3ab3077.dll
Size

5.0MB
MD5

07813c26f199fef5b9963f31c3ab3077
SHA1

6319cd8890da043cf36832e4d895033b4e502ec9
SHA256

eedd33dfe6084c4fb8ff22594c5b4e6c35ff76170efa2caf12556a3ae427bf7f
SHA512

61793cbf78eecd5c7e05446f86d0a8e4b4170e28652f4d19894741c52d943eb675a274357eb20d08bdcfdaaeb06b070891bcb017efe3ec63ccdf2578bf80a239

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1261) 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

944 mssecsvr.exe
844 mssecsvr.exe

pid	process
944	mssecsvr.exe
844	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\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
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\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	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-64-60-a3-0c-ed\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-64-60-a3-0c-ed\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}\0a-64-60-a3-0c-ed	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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00cc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}\WpadDecisionTime = 401e868ff29bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}\WpadDecision = "0"	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ED4E3C32-E9E3-4CCE-BDAD-D0905E077CEE}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-64-60-a3-0c-ed	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-64-60-a3-0c-ed\WpadDecisionTime = 401e868ff29bd801	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1476 wrote to memory of 1916	1476	rundll32.exe	rundll32.exe
PID 1916 wrote to memory of 944	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 944	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 944	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 944	1916	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\07813c26f199fef5b9963f31c3ab3077.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1476

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\07813c26f199fef5b9963f31c3ab3077.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1916

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:944

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:844

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
3.6MB

MD5
289caf2bf72f4dceb04c65bf03d7bab1

SHA1
4daa3f803e95a784b47bac4d96f56b879812a85a

SHA256
b668a57b5eda98b43fed817821414f1d0b63bb8cdd481808d49e48b956bd75b6

SHA512
6029ad714e89d81dd797905b5d33962d023f935ae8d845e38d7e2071074c0f747db5870189a9e14c196062d9b3e3edf1edc7458ffc90ebf1717571f84e6b4c20

Download Submit
C:\Windows\mssecsvr.exe
Filesize
3.6MB

MD5
289caf2bf72f4dceb04c65bf03d7bab1

SHA1
4daa3f803e95a784b47bac4d96f56b879812a85a

SHA256
b668a57b5eda98b43fed817821414f1d0b63bb8cdd481808d49e48b956bd75b6

SHA512
6029ad714e89d81dd797905b5d33962d023f935ae8d845e38d7e2071074c0f747db5870189a9e14c196062d9b3e3edf1edc7458ffc90ebf1717571f84e6b4c20

Download Submit
C:\Windows\mssecsvr.exe
Filesize
3.6MB

MD5
289caf2bf72f4dceb04c65bf03d7bab1

SHA1
4daa3f803e95a784b47bac4d96f56b879812a85a

SHA256
b668a57b5eda98b43fed817821414f1d0b63bb8cdd481808d49e48b956bd75b6

SHA512
6029ad714e89d81dd797905b5d33962d023f935ae8d845e38d7e2071074c0f747db5870189a9e14c196062d9b3e3edf1edc7458ffc90ebf1717571f84e6b4c20

Download Submit
memory/944-56-0x0000000000000000-mapping.dmp

Download
memory/1916-54-0x0000000000000000-mapping.dmp

Download
memory/1916-55-0x00000000768C1000-0x00000000768C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads