wannacry | 66f1d8d65c041689a1c05c661794e44bab00a546fac687089bab07a556c859ce

General

Target

2259ebf3658c2dd6ab1e53e3c23fad4d.dll
Size

5.0MB
MD5

2259ebf3658c2dd6ab1e53e3c23fad4d
SHA1

0e1170d4132d995d404b86772cf41b399aa967d4
SHA256

66f1d8d65c041689a1c05c661794e44bab00a546fac687089bab07a556c859ce
SHA512

6b2f2ef1eb186923d64f86fb3fe9a08baac2089ec1d405a931c33c1c097692685ab4514aeeb9896ced9497709269120519695c8c26d04575bf26eba3d855aae8

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1123) 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

1612 mssecsvr.exe
1052 mssecsvr.exe

pid	process
1612	mssecsvr.exe
1052	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\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}\WpadDecisionTime = 50aaed70ea9bd801	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
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
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\a6-6b-26-6b-84-8e\WpadDecisionReason = "1"	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 (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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3A5A17F7-137A-426E-9AC2-40F809C1E4DD}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\a6-6b-26-6b-84-8e\WpadDecisionTime = 50aaed70ea9bd801	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 (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\Wpad\a6-6b-26-6b-84-8e	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
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\ZoneMap\	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1172 wrote to memory of 1196	1172	rundll32.exe	rundll32.exe
PID 1196 wrote to memory of 1612	1196	rundll32.exe	mssecsvr.exe
PID 1196 wrote to memory of 1612	1196	rundll32.exe	mssecsvr.exe
PID 1196 wrote to memory of 1612	1196	rundll32.exe	mssecsvr.exe
PID 1196 wrote to memory of 1612	1196	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2259ebf3658c2dd6ab1e53e3c23fad4d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1172

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2259ebf3658c2dd6ab1e53e3c23fad4d.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1196

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1612

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:1052

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
3.6MB

MD5
50dc06528bc615007083fc5084369964

SHA1
c3fe4bc71b70991ab20f50edafd99f0f12448f58

SHA256
c0f19b6b51913c494055efbd17850e8c195374c4f198323429787ed16e1eb2f2

SHA512
d6e33412f1ba1c15931717f702fcab3ca35ac988e53aea37e20fbf6b31876f2cde7b303e0b43e792df2468b3bf3a425f71d4fb5e56e60935f03f5965d1c4beab

Download Submit
C:\Windows\mssecsvr.exe

Filesize
3.6MB

MD5
50dc06528bc615007083fc5084369964

SHA1
c3fe4bc71b70991ab20f50edafd99f0f12448f58

SHA256
c0f19b6b51913c494055efbd17850e8c195374c4f198323429787ed16e1eb2f2

SHA512
d6e33412f1ba1c15931717f702fcab3ca35ac988e53aea37e20fbf6b31876f2cde7b303e0b43e792df2468b3bf3a425f71d4fb5e56e60935f03f5965d1c4beab

Download Submit
C:\Windows\mssecsvr.exe

Filesize
3.6MB

MD5
50dc06528bc615007083fc5084369964

SHA1
c3fe4bc71b70991ab20f50edafd99f0f12448f58

SHA256
c0f19b6b51913c494055efbd17850e8c195374c4f198323429787ed16e1eb2f2

SHA512
d6e33412f1ba1c15931717f702fcab3ca35ac988e53aea37e20fbf6b31876f2cde7b303e0b43e792df2468b3bf3a425f71d4fb5e56e60935f03f5965d1c4beab

Download Submit
memory/1196-54-0x0000000000000000-mapping.dmp

Download
memory/1196-55-0x00000000754F1000-0x00000000754F3000-memory.dmp

Filesize
8KB

Download
memory/1612-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads