wannacry | 49bc3a664b93bd8e056c3d851458b39ba40f19d97c35b43bfe3be25d64a5b0f2

General

Target

8f5f214c98f0287f8ef9ecc18e1fab41_JaffaCakes118.dll
Size

5.0MB
MD5

8f5f214c98f0287f8ef9ecc18e1fab41
SHA1

220239a1acde4883173708d67b28a1757617b30a
SHA256

49bc3a664b93bd8e056c3d851458b39ba40f19d97c35b43bfe3be25d64a5b0f2
SHA512

b99721ca0b82bc3830261de68808695a7e702fb2f5119417e2a18a91ee3f0112d612f9800e9b473fa8b6e910a75a5899ac18e9a2b0e12f670c3433107abbcf4a
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:TDqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3083) 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

pid	Process
2300	mssecsvc.exe
2708	mssecsvc.exe
2548	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

Drops file in System32 directory 1 IoCs

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

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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}\WpadDecisionTime = 90cb3254d1ecda01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}\da-61-d2-f2-ff-2b	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\Cookies\CachePrefix = "Cookie:"	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
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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0195000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\da-61-d2-f2-ff-2b	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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{717F64BA-BD50-4BEF-9EEE-7750A2E58079}\WpadDecisionReason = "1"	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\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\da-61-d2-f2-ff-2b\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\da-61-d2-f2-ff-2b\WpadDecisionTime = 90cb3254d1ecda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\da-61-d2-f2-ff-2b\WpadDecision = "0"	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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 2644 wrote to memory of 3052	2644	rundll32.exe	30
PID 3052 wrote to memory of 2300	3052	rundll32.exe	31
PID 3052 wrote to memory of 2300	3052	rundll32.exe	31
PID 3052 wrote to memory of 2300	3052	rundll32.exe	31
PID 3052 wrote to memory of 2300	3052	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f5f214c98f0287f8ef9ecc18e1fab41_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2644
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f5f214c98f0287f8ef9ecc18e1fab41_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2300
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2548

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2708

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
942909153e8b74e1ae1952832b0490b2

SHA1
a81b0961dce4a97065bbf25263c74ecfd5eaf05a

SHA256
dfcf3d622d8f4a93e37d0660fe44b7e7a7dcd3e8455b35c761cda93711b76d8a

SHA512
e77af24459f6029b5a734df1c6b58757430a2e9f8f5206f37d794bdbc64d71527592460aec44d7e4911b98574cca07bd0733256352d3cca2254fa345c91e5281

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
087b53c2419173b5a420fbc8e681f835

SHA1
8dec196caa990860a3caa43ddf46a6dc02466d6b

SHA256
92b1708d4012723d30ee578280934d461b7da89080c46b3fedba118c62356a33

SHA512
caed6524259d4b15db20d146cb03d3e5be01ba8c6ef7e0fa572ba229607bcdad940a67ae248512e8eb7aa548552012cf7421315481a85cd321190dbfa88a19ae

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Analysis

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