wannacry | 9cd4552f57cefe8177df49810e39c6a452a24f4fd6327bc0d704b9ccb4757d51

General

Target

1ffe76bc279f246fcd03a6e839617804_JaffaCakes118.dll
Size

5.0MB
MD5

1ffe76bc279f246fcd03a6e839617804
SHA1

1c974418ca7772fd6ad5f6905dab65eae79c552e
SHA256

9cd4552f57cefe8177df49810e39c6a452a24f4fd6327bc0d704b9ccb4757d51
SHA512

eb6adc535be63f9ddbd05541c2ea542f07a4b6a506fe53548e6ee2ba9b0f448a9051e0a8d4e602f767d06a26a6e0c2731638287bf6900c07d098231e2ff0c278
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhS+Gs:+DqPoBhz1aRxcSUDk36SAEdhS+G

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3286) 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

2316 mssecsvc.exe
2836 mssecsvc.exe
2664 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
2316	mssecsvc.exe
2836	mssecsvc.exe
2664	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
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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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
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\{7AB79480-A348-4231-A1D0-1A790C64C596}\0e-3b-bb-b0-8e-62	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	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7AB79480-A348-4231-A1D0-1A790C64C596}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7AB79480-A348-4231-A1D0-1A790C64C596}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3b-bb-b0-8e-62	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3b-bb-b0-8e-62\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7AB79480-A348-4231-A1D0-1A790C64C596}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3b-bb-b0-8e-62\WpadDecisionReason = "1"	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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f004e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7AB79480-A348-4231-A1D0-1A790C64C596}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7AB79480-A348-4231-A1D0-1A790C64C596}\WpadDecisionTime = c096843856a0da01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3b-bb-b0-8e-62\WpadDecisionTime = c096843856a0da01	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2352 wrote to memory of 2064	2352	rundll32.exe	rundll32.exe
PID 2064 wrote to memory of 2316	2064	rundll32.exe	mssecsvc.exe
PID 2064 wrote to memory of 2316	2064	rundll32.exe	mssecsvc.exe
PID 2064 wrote to memory of 2316	2064	rundll32.exe	mssecsvc.exe
PID 2064 wrote to memory of 2316	2064	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1ffe76bc279f246fcd03a6e839617804_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2352

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1ffe76bc279f246fcd03a6e839617804_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2064

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2316

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2664

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:2836

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
3ee9eebcdffa4128022aaf2393b6ebd9

SHA1
c1bebfd99486fb32de552827b180b6f63352c1c0

SHA256
15643c4a5c65ca8c6f06fe732e06d59a453b05e6def69471c00600ae4a1ef4b3

SHA512
738989748901a8111f942fbfa030e1723e1c7a8deab219246d07035142efb8a0e33b3eb1e4859d5dfc2372e5a715d5f2c80c71bfb9c23acceb2bfa51eb947949

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
0d1113f38865045b2a944cb24cc01724

SHA1
0ed4ee11890c489fe045536d763816a0006aceaa

SHA256
c04378df6ff17ae98fb0eaed86d67cda6813b7bb0df2316a1bc8a46cf21f0a10

SHA512
9973bee72e2194904adeea6dd496b1d9e13e7aa015aa579a50851ed110fe8efcf4f29613bc732a4ab99e927430845f4b332532caae2a50c04246a98f94a3691d

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads