wannacry | 9a44bdd3e8bbabec20228aceff16b42a0c9b8cf8ec5d6c33e72a6de7a4bf8625

General

Target

5331dcc2b7a9dc4c56dcaf9400024e18_JaffaCakes118.dll
Size

5.0MB
MD5

5331dcc2b7a9dc4c56dcaf9400024e18
SHA1

66cb274de4c256c708c35d916b290f820bc3c17a
SHA256

9a44bdd3e8bbabec20228aceff16b42a0c9b8cf8ec5d6c33e72a6de7a4bf8625
SHA512

d4634d09827cc0892f755b6dabe4bbd7bf2a5e0ad76ee7bdeae6dbcb94e5d244c6d55d5915e2805a299a44687828ee11ad6b3b3a369813567487b6d3b7f9309b
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKzozjeX6SAZBn/:SnAQqMSPbcBVQej/1INu6SA3/

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3252) 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

2340 mssecsvc.exe
2536 mssecsvc.exe
2560 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
2340	mssecsvc.exe
2536	mssecsvc.exe
2560	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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-db-d7-5b-90-71\WpadDecisionTime = 00fd38c9e4a8da01	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\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00ff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-db-d7-5b-90-71	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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
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\AutoDetect = "1"	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\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}\WpadDecisionTime = 00fd38c9e4a8da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-db-d7-5b-90-71\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-db-d7-5b-90-71\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDED9258-8DCF-4388-96B2-6E292074C4FE}\aa-db-d7-5b-90-71	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 2988 wrote to memory of 1732	2988	rundll32.exe	rundll32.exe
PID 1732 wrote to memory of 2340	1732	rundll32.exe	mssecsvc.exe
PID 1732 wrote to memory of 2340	1732	rundll32.exe	mssecsvc.exe
PID 1732 wrote to memory of 2340	1732	rundll32.exe	mssecsvc.exe
PID 1732 wrote to memory of 2340	1732	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5331dcc2b7a9dc4c56dcaf9400024e18_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2988

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5331dcc2b7a9dc4c56dcaf9400024e18_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1732

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2340

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2560

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:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
fe9b5b75f3e267dcdfe1648fb681fa62

SHA1
bbf80b2af90465b753ab4958fdddd2a116162a7a

SHA256
9bdb3ccd8180ae06303d0c3e80e7032013506c47dc38bc629baf62d8cb3b4068

SHA512
a11aea279099ebdec32be47a236057ce08b2ed9a3362c314ac85772a5de455875bb8efcc13a2b793e7412803871e8f4925dcfce25f4d2d008dacc429eee0c0d4

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
ba20334dc03e894d28f68253d34ee54e

SHA1
5c527f1c1e7e9ebc48e954e69151f2663d252214

SHA256
c2de58d868977ed4d840df15b6dcbf2da52c9fae35853318fd7d3d21919628a5

SHA512
f077b606405432552d82d9e0674752e94042530ba1dacf1290cf856743e2393805b3575f8005227a2442ea1111002bf38cd1a50c07d21c9e6cdd20691a59a707

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads