wannacry | 9a23af3c1a00f24b0863a75e22a294d4983ee6fefa832a9f6a6241810565cfba

General

Target

eb3b370b3c7897d6a6b6616437183b4f.dll
Size

5.0MB
MD5

eb3b370b3c7897d6a6b6616437183b4f
SHA1

165e0fb3d292e61cf83d0128586a0d36915513a0
SHA256

9a23af3c1a00f24b0863a75e22a294d4983ee6fefa832a9f6a6241810565cfba
SHA512

90590e2b51e3b9018f35fea87dab6a56b50b8131308f90db18fd9598f4ae26ed7d4299c46ba7af3ab302b65d231bd2cf3d1bd1c04ab53c5cd93614f8aaf7a790

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1145) 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

1628 mssecsvr.exe
1440 mssecsvr.exe

pid	process
1628	mssecsvr.exe
1440	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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "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\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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadDecisionTime = d0e1acf9e09bd801	mssecsvr.exe
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\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\a6-6b-26-6b-84-8e	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadNetworkName = "Network 3"	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\a6-6b-26-6b-84-8e\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\a6-6b-26-6b-84-8e\WpadDecisionTime = d0e1acf9e09bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\a6-6b-26-6b-84-8e\WpadDecision = "0"	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
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\a6-6b-26-6b-84-8e	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\Connections	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\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 1480 wrote to memory of 848	1480	rundll32.exe	rundll32.exe
PID 848 wrote to memory of 1628	848	rundll32.exe	mssecsvr.exe
PID 848 wrote to memory of 1628	848	rundll32.exe	mssecsvr.exe
PID 848 wrote to memory of 1628	848	rundll32.exe	mssecsvr.exe
PID 848 wrote to memory of 1628	848	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb3b370b3c7897d6a6b6616437183b4f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1480

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb3b370b3c7897d6a6b6616437183b4f.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:848

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1628

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:1440

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
e2e35b2bbd2093d5ae8996e93c5c435c

SHA1
ce7c096026bbb2139d4add460c173decd8a23143

SHA256
2034cd07ad01f3f741b1e45ca9ca5428ed7aa8d954d96e71c1be20b946b83f31

SHA512
1f1eee8be7e8790c5a0ccc27bbbee26f847625a412147abaee680be68605b769f1e43407ddecce552d8e4ea3771bafd60c8203e3df2ab6d37acfcf4724090f7d

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

MD5
e2e35b2bbd2093d5ae8996e93c5c435c

SHA1
ce7c096026bbb2139d4add460c173decd8a23143

SHA256
2034cd07ad01f3f741b1e45ca9ca5428ed7aa8d954d96e71c1be20b946b83f31

SHA512
1f1eee8be7e8790c5a0ccc27bbbee26f847625a412147abaee680be68605b769f1e43407ddecce552d8e4ea3771bafd60c8203e3df2ab6d37acfcf4724090f7d

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

MD5
e2e35b2bbd2093d5ae8996e93c5c435c

SHA1
ce7c096026bbb2139d4add460c173decd8a23143

SHA256
2034cd07ad01f3f741b1e45ca9ca5428ed7aa8d954d96e71c1be20b946b83f31

SHA512
1f1eee8be7e8790c5a0ccc27bbbee26f847625a412147abaee680be68605b769f1e43407ddecce552d8e4ea3771bafd60c8203e3df2ab6d37acfcf4724090f7d

Download Submit
memory/848-54-0x0000000000000000-mapping.dmp

Download
memory/848-55-0x00000000754F1000-0x00000000754F3000-memory.dmp

Filesize
8KB

Download
memory/1628-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads