wannacry | 7b7ddabfbae37a28fa501c3a029ba5f5d5daa9647a90bfdabf629f109a64096e

General

Target

b8ed70b804a34ef41e632b1e52b9d71d_JaffaCakes118.dll
Size

5.0MB
MD5

b8ed70b804a34ef41e632b1e52b9d71d
SHA1

4ddd2bec1f5e9f0cf99b2448a5a7b52d15373a76
SHA256

7b7ddabfbae37a28fa501c3a029ba5f5d5daa9647a90bfdabf629f109a64096e
SHA512

586e5fb6f22495151e144d15b7ca09568a6ccf027d678466f7fc24374d285fd734015a2d61ec8ec7255e83a54ea1cb46060b4b6116e6d2cf9ce850ae1f9c6190
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQ14kFNNZtA0p+9XEk:SnAQqMSPbcBVQe2dNlAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3333) 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
2104	mssecsvc.exe
1280	mssecsvc.exe
756	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\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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 (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\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}\WpadNetworkName = "Network 2"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}\36-af-7a-01-40-49	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
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-af-7a-01-40-49\WpadDecisionTime = 80d8df05cdf4da01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00e9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-af-7a-01-40-49	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\AutoDetect = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}\WpadDecisionTime = 80d8df05cdf4da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{0FF0E55F-CB82-461E-BBBD-B35CD53A7E64}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-af-7a-01-40-49\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-af-7a-01-40-49\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 1856 wrote to memory of 2092	1856	rundll32.exe	30
PID 2092 wrote to memory of 2104	2092	rundll32.exe	31
PID 2092 wrote to memory of 2104	2092	rundll32.exe	31
PID 2092 wrote to memory of 2104	2092	rundll32.exe	31
PID 2092 wrote to memory of 2104	2092	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b8ed70b804a34ef41e632b1e52b9d71d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b8ed70b804a34ef41e632b1e52b9d71d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2092
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2104
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:756

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:1280

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

Loading Replay Monitor...

Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
6ddab34641ddd572aaee54e3ee51c64a

SHA1
3db4f536187aba054a2794630181d58810055104

SHA256
ea04235ff9db8bf72b4a9dee3c3d8d4368016bdd6b55666b05fce6b773ddab3d

SHA512
25aca621a9468ae2024bbd2cf6b2cbae8334458198e47e6112b62b00e742468abe7ea5ac4218e720bde9a21571773fba6f3fa88c23d805db82ecbdf7ed9f72ba

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c44957088e24d950bba86b5dc7af4d93

SHA1
c040bba277cae42aaa47a40e72b0f74e87dffb8c

SHA256
e2085d37f3705969fb42500d6d968ff295df851b7419b4aef2f0cbba175e5dbc

SHA512
52750e47e9e1f394215d3ec542ae04f6e92b1667d288c7b7dca2410358dcb8906e4db79ab1223647f9bb3464a46ce3baa727200cd3a6cd438d6e4395cb0025d1

Download Submit

Analysis

Sharing