wannacry | a917952029deb1a0e3492291a08303bfd0da6f93480bb1da9a878b15e609bfc7

General

Target

50a4daa7e9c1fc8a4b62457f9d7538c9.dll
Size

5.0MB
MD5

50a4daa7e9c1fc8a4b62457f9d7538c9
SHA1

e2ab9e97df6457e299155213b88f53c22d55c6c4
SHA256

a917952029deb1a0e3492291a08303bfd0da6f93480bb1da9a878b15e609bfc7
SHA512

cda68bb356406414ee36534b0fb7c4a18919dbee9d489a5437c7b9f3bf32350df1bc08418a91181461ced9b99517715d104e46dc5f2f4c3b2e4408bb393ebbf4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1190) 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

2036 mssecsvr.exe
904 mssecsvr.exe

pid	process
2036	mssecsvr.exe
904	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\ProxyEnable = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	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\8a-3a-e4-6c-9a-8f\WpadDecision = "0"	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	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 (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	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\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}\WpadDecisionTime = 807e2c23eb9bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8a-3a-e4-6c-9a-8f	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8a-3a-e4-6c-9a-8f\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8a-3a-e4-6c-9a-8f\WpadDecisionTime = 807e2c23eb9bd801	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
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\Wpad\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}\8a-3a-e4-6c-9a-8f	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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b8000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2416CCD9-80FE-4F92-8545-C9B01F27B9D0}\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 1916	1180	rundll32.exe	rundll32.exe
PID 1916 wrote to memory of 2036	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 2036	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 2036	1916	rundll32.exe	mssecsvr.exe
PID 1916 wrote to memory of 2036	1916	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\50a4daa7e9c1fc8a4b62457f9d7538c9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1180

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\50a4daa7e9c1fc8a4b62457f9d7538c9.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:2036

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:904

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
5317fdfcd2406217ec66a3cb4b5a8413

SHA1
3a54316147d3f50932c1ce4f794ce0ce1b7b9a7f

SHA256
4438ad009cf422c890195912636ed52e48773d36e7dc0a34519d7324d3392328

SHA512
e8860f047f8b20a027413edacf68ead9fba01f23a60a11cd33274416c37d1f44291febbf915ba3fd1383812a35a7e7ae50f048711e99433232683ec873523687

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
5317fdfcd2406217ec66a3cb4b5a8413

SHA1
3a54316147d3f50932c1ce4f794ce0ce1b7b9a7f

SHA256
4438ad009cf422c890195912636ed52e48773d36e7dc0a34519d7324d3392328

SHA512
e8860f047f8b20a027413edacf68ead9fba01f23a60a11cd33274416c37d1f44291febbf915ba3fd1383812a35a7e7ae50f048711e99433232683ec873523687

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
5317fdfcd2406217ec66a3cb4b5a8413

SHA1
3a54316147d3f50932c1ce4f794ce0ce1b7b9a7f

SHA256
4438ad009cf422c890195912636ed52e48773d36e7dc0a34519d7324d3392328

SHA512
e8860f047f8b20a027413edacf68ead9fba01f23a60a11cd33274416c37d1f44291febbf915ba3fd1383812a35a7e7ae50f048711e99433232683ec873523687

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

Download
memory/1916-55-0x0000000075481000-0x0000000075483000-memory.dmp

Filesize
8KB

Download
memory/2036-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads