wannacry | 154c56bb51ad5c9f3e5deb0adaf0cd502bd37abe06fa2a33a2d08a50293c4c19

General

Target

4696987fb3ce51babd37d6c61cdc53a2.dll
Size

5.0MB
MD5

4696987fb3ce51babd37d6c61cdc53a2
SHA1

4c1271091510cc5a087f2b70b62a9a509018c577
SHA256

154c56bb51ad5c9f3e5deb0adaf0cd502bd37abe06fa2a33a2d08a50293c4c19
SHA512

473191b99fdd09db4d001f4c5870ee5204fb5eea47faa6b0cb4dbf5346caf846d92c11b223d0845fdec6084954055f92b150631c3d96b1d419bb6e3c2675f4d3

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1263) 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

1452 mssecsvr.exe
1408 mssecsvr.exe

pid	process
1452	mssecsvr.exe
1408	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:

mssecsvr.exerundll32.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.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\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\Content\CachePrefix	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecisionTime = a062ad06f69bd801	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5\WpadDecisionTime = a062ad06f69bd801	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\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\22-26-7f-50-2d-c5	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\Wpad\22-26-7f-50-2d-c5\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4696987fb3ce51babd37d6c61cdc53a2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1920

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4696987fb3ce51babd37d6c61cdc53a2.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:896

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1452

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:1408

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

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
4d0974404e3280388a3e76496fe379db

SHA1
09ed10c0490b7545775866149e5d75c3bb5823bb

SHA256
5478341baa7b7ed2d71f8e64efddd0ea495aeaa42bad6a979285ded6c4da652d

SHA512
268ada1aedc03da856a051d161bbcee52ee0a8c7854abcbcd1ccd0b51f41535856407da606fb74f75463ec6d7f7444f13ca6ff86a7845e6a35d99f5db4a4dd25

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

MD5
4d0974404e3280388a3e76496fe379db

SHA1
09ed10c0490b7545775866149e5d75c3bb5823bb

SHA256
5478341baa7b7ed2d71f8e64efddd0ea495aeaa42bad6a979285ded6c4da652d

SHA512
268ada1aedc03da856a051d161bbcee52ee0a8c7854abcbcd1ccd0b51f41535856407da606fb74f75463ec6d7f7444f13ca6ff86a7845e6a35d99f5db4a4dd25

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

MD5
4d0974404e3280388a3e76496fe379db

SHA1
09ed10c0490b7545775866149e5d75c3bb5823bb

SHA256
5478341baa7b7ed2d71f8e64efddd0ea495aeaa42bad6a979285ded6c4da652d

SHA512
268ada1aedc03da856a051d161bbcee52ee0a8c7854abcbcd1ccd0b51f41535856407da606fb74f75463ec6d7f7444f13ca6ff86a7845e6a35d99f5db4a4dd25

Download Submit
memory/896-54-0x0000000000000000-mapping.dmp

Download
memory/896-55-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

Filesize
8KB

Download
memory/1452-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads