wannacry | 136405b165c6eec8be85c59075f98012d8fe5cf802328e47d3228e99f5897170

General

Target

9a1ae1d496ead541d17cfc3a0e3c5eef_JaffaCakes118.dll
Size

5.0MB
MD5

9a1ae1d496ead541d17cfc3a0e3c5eef
SHA1

502ca1a6a02620673685f7b55161ce7889e828aa
SHA256

136405b165c6eec8be85c59075f98012d8fe5cf802328e47d3228e99f5897170
SHA512

12f73b3ab7fe5a766dee4185f407a13039ca7123bf66a7109b81d9abda96234c91e38ed49743bb3ae2b4bdc94bc716220aad38c40a7ec47b4a46226411d02224
SSDEEP

98304:+DqPoBBz1aRxcSUZk36SAEdhvxWa9P593R8yAVp2H:+DqP+1Cxc7k3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3262) 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
2328	mssecsvc.exe
2296	mssecsvc.exe
2844	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
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 (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-14-0f-1f-e1-04	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\Wpad\9e-14-0f-1f-e1-04\WpadDecisionTime = 606d97ef11efda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-14-0f-1f-e1-04\WpadDecision = "0"	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\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}\WpadDecision = "0"	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\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}\9e-14-0f-1f-e1-04	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\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0076000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3BF7F99E-EA00-4901-9DB9-AC5E1107BC78}\WpadDecisionTime = 606d97ef11efda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-14-0f-1f-e1-04\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2348 wrote to memory of 2972	2348	rundll32.exe	29
PID 2972 wrote to memory of 2328	2972	rundll32.exe	30
PID 2972 wrote to memory of 2328	2972	rundll32.exe	30
PID 2972 wrote to memory of 2328	2972	rundll32.exe	30
PID 2972 wrote to memory of 2328	2972	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9a1ae1d496ead541d17cfc3a0e3c5eef_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9a1ae1d496ead541d17cfc3a0e3c5eef_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2328
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2844

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:2296

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
7a4e4cd532a9916b9fd9d9a716629b54

SHA1
1f4acecf328d030b4d112bae17e76722672e8566

SHA256
c7db8417f567a78f29a2f51271d9f06f04bdb6e6ae69af3e6ae41559e402683c

SHA512
ffa8e059add74c35e1437c4d0786dbc3a43162663f775b2b106c81488fad137e4c36478f2cd4f5c9b8aad8fcf1ef80346c6654902a71ce18d001c098c5119a1d

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
98f29c78a11cd9ef33dd088279be1546

SHA1
6044a0e9c0beea4014cde01967d8dff9bb4fa4ca

SHA256
6c265b91de4cbd01931120236dd412fed943a774ba11de9f86d55a395838a042

SHA512
2e13cb4f5e2d7848fb644f45d40370ff2269743f7995dbccaed8b9a44cb34f8de34af1b35cafebea9932500ebdafc43a6f18897465bf794923e940d807b131ab

Download Submit

Analysis

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