wannacry | a9fa6e9a07840936038728e94c7cd5b9c345f81d0a81622852d7f719e38f2415

General

Target

75c41f9cb3b0920cbdf6a6d58bff2639_JaffaCakes118.dll
Size

5.0MB
MD5

75c41f9cb3b0920cbdf6a6d58bff2639
SHA1

9a8d716574ed1d45b15635d3b6edf376e1977f0f
SHA256

a9fa6e9a07840936038728e94c7cd5b9c345f81d0a81622852d7f719e38f2415
SHA512

52f77dd5ceecc4b202cc3ead37a6f898a496172611433ead8a33127b83586daf8b0889bce89d28ecf5dfeed90eadb7cb9f025b963f4ad90bcc427b4ac2b94ec1
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAkhu3R8yAVp2p:TDqPe1Cxcxk3ZAzR8yc4p

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3321) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Executes dropped EXE 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

1980 mssecsvc.exe
3012 mssecsvc.exe
2668 tasksche.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

pid	process
1980	mssecsvc.exe
3012	mssecsvc.exe
2668	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-eb-7e-51-d1-c6\WpadDecisionTime = e0cf71e477afda01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0117000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}\WpadDecisionTime = e0cf71e477afda01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-eb-7e-51-d1-c6	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{E38402DF-3D1C-46FF-9F71-7B7F06D441B3}\b6-eb-7e-51-d1-c6	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-eb-7e-51-d1-c6\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-eb-7e-51-d1-c6\WpadDecisionReason = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 2160	2156	rundll32.exe	rundll32.exe
PID 2160 wrote to memory of 1980	2160	rundll32.exe	mssecsvc.exe
PID 2160 wrote to memory of 1980	2160	rundll32.exe	mssecsvc.exe
PID 2160 wrote to memory of 1980	2160	rundll32.exe	mssecsvc.exe
PID 2160 wrote to memory of 1980	2160	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75c41f9cb3b0920cbdf6a6d58bff2639_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2156

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75c41f9cb3b0920cbdf6a6d58bff2639_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2160

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1980

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2668

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:3012

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
8459dcb2510f8cd5bee8b34428ab9308

SHA1
e20b490f6ca30fc95fe0f41dc6bdd6bfb5a8cb21

SHA256
aa26e0c95a0713720d0e441b04b74e80efa2b5580c373887bbed345c3bb4642c

SHA512
d5f40771695efa38d3ca119f3f9dfb0ba32d5e47109251b8ef236a2c1d15f4e1d7956860252544869859fef3dec3ff287e76f3baa5902546230f308f81b6ccdf

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
beb56ae73b5e9573b108236be6a155ab

SHA1
321d98a7ba9b5d99c38bc4d238967d3d5e8420d3

SHA256
60063a3b2936f8f1db3ab224b003a331e920b314ac79ecee0bdc8e8d9f2c40db

SHA512
c685a6bef11254b55589b3bc1d4965947915aa857aa2714f6cf9a903c6e83aaf98e2a992b18b824684ae1fb7e0c3c74c9ed21490a5f4c3990e7441af9a368a7e

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads