wannacry | a071df6262173d7fb78e2e0b6d96439441b657daad2162f9bd6388ccbd90d91e

General

Target

b36695cca1cd0713d390b59f06fb98fe_JaffaCakes118.dll
Size

5.0MB
MD5

b36695cca1cd0713d390b59f06fb98fe
SHA1

b377b3663db29bb9d62c03b0ac3b1972a1951c10
SHA256

a071df6262173d7fb78e2e0b6d96439441b657daad2162f9bd6388ccbd90d91e
SHA512

61cde40322f96a52739c1802329258ebeb499fdf85a48fcf7dac22432171d4677a847c43de9ad5063b6a7a4837272997faf9002a33375613c1df9db11495d99f
SSDEEP

98304:+DqPoBh31aRxcSUDk36SAEdhvxWa9P59up2H:+DqP61Cxcxk3ZAEUadC4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3182) 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

2192 mssecsvc.exe
2668 mssecsvc.exe
2804 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
2192	mssecsvc.exe
2668	mssecsvc.exe
2804	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\{1655BD6D-16ED-4080-938B-25809094E160}\WpadDecisionTime = e0a6ffdee4bfda01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5a-f5-29-71-bd-4a\WpadDecisionTime = e0a6ffdee4bfda01	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\ZoneMap\	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0169000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1655BD6D-16ED-4080-938B-25809094E160}	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1655BD6D-16ED-4080-938B-25809094E160}\5a-f5-29-71-bd-4a	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5a-f5-29-71-bd-4a\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	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 (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
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1655BD6D-16ED-4080-938B-25809094E160}\WpadNetworkName = "Network 3"	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 (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\{1655BD6D-16ED-4080-938B-25809094E160}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1655BD6D-16ED-4080-938B-25809094E160}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5a-f5-29-71-bd-4a	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5a-f5-29-71-bd-4a\WpadDecisionReason = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 1936 wrote to memory of 948	1936	rundll32.exe	rundll32.exe
PID 948 wrote to memory of 2192	948	rundll32.exe	mssecsvc.exe
PID 948 wrote to memory of 2192	948	rundll32.exe	mssecsvc.exe
PID 948 wrote to memory of 2192	948	rundll32.exe	mssecsvc.exe
PID 948 wrote to memory of 2192	948	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b36695cca1cd0713d390b59f06fb98fe_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1936

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b36695cca1cd0713d390b59f06fb98fe_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:948

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2192

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2804

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:2668

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
675145060c00ccb48f841f5bfd935bc9

SHA1
657c1b9f1c48a354afb0ec6842925722dffffa14

SHA256
5d05ec8a444b185321ee82a20848e48e3fa0a29de614adb2b1adcefc4243037c

SHA512
38038baea9eac7fdfa5428e7e857524bf28447e554f6dd03f82cd77c35e81de8629b35ef636bf301ac5a61ad863489976e2991b634e4e1b62030483a96132181

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
4fe15a2a7f48a8eab292f567ced2078e

SHA1
b893ea8ca01235fe480d9be6a80d14f82ce4338f

SHA256
2a288414ea743b264a25506dc4bbeaf513c792b613511006b3c4b1105a77c5e9

SHA512
53c1fb60c5c1b469d81771398503f7f207ead87b1724a2c72c85444f3ed96b486e0ba1b67e03f1d729cea5a3abc02a2250a2e4fa7fce966cd20a80d280c9fdea

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads