wannacry | f738a899a5bc57660de6acbe5120242323d88927b6314b66258058e7bbc6bd37

General

Target

f1ab4343d91972fc89d6a597b7972c14_JaffaCakes118.dll
Size

5.0MB
MD5

f1ab4343d91972fc89d6a597b7972c14
SHA1

0eac99c98689df0c6d697255666942847234d50b
SHA256

f738a899a5bc57660de6acbe5120242323d88927b6314b66258058e7bbc6bd37
SHA512

f66b48a39a214295aef1b0a7c49bb62f4986dfd974214623e8f410c394ba3ca36024e1b2cb370e9d8c72150b278c94d576006e3a521d881ef5794b08c2361945
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5sp2H:+DqPe1Cxcxk3ZAEUadS4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3232) 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
2068	mssecsvc.exe
1644	mssecsvc.exe
2944	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	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}\WpadDecisionTime = d05f5f48cb0cdb01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e6-0b-99-d9-a8-3f	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\ProxyEnable = "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\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e6-0b-99-d9-a8-3f\WpadDecisionReason = "1"	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\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e6-0b-99-d9-a8-3f\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f019f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}\WpadDecisionReason = "1"	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\ZoneMap\	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\Wpad\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{5046E9E1-E2EC-4C63-8138-D55078FAA18C}\e6-0b-99-d9-a8-3f	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\Wpad\e6-0b-99-d9-a8-3f\WpadDecisionTime = d05f5f48cb0cdb01	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 3048 wrote to memory of 2388	3048	rundll32.exe	30
PID 2388 wrote to memory of 2068	2388	rundll32.exe	31
PID 2388 wrote to memory of 2068	2388	rundll32.exe	31
PID 2388 wrote to memory of 2068	2388	rundll32.exe	31
PID 2388 wrote to memory of 2068	2388	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f1ab4343d91972fc89d6a597b7972c14_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f1ab4343d91972fc89d6a597b7972c14_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2068
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2944

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:1644

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
d2ed4595df5b1f5619f90b258eb26fb4

SHA1
20277158ab5e88f7dacc3e5a5cb129ed60cb2156

SHA256
94d1f118a3fc9638e847598c6638d07bc059bacecaf6610fbdb8326e5350b907

SHA512
013bec709ce6edfe5ea7c28731fa57c82cae40eea6b762f6063afa14d517f6cfcfc329350e9ba7f3492f3405a727895c14c8c822d01d7b2d3ec36e7836e91b14

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1bd09d8afb4d0c32bf8834a71d04d373

SHA1
21e8a2ac3d06ccfec2eae891671f2a31a58a82c8

SHA256
64ce6c1b7a5976832f49e15084041160ae270487695df5bbb0390323303e4ff0

SHA512
6c1509046a0660ba8c74e0ea73a9803f3787d0813c2e40140c1c9d524f6bb9822922435731f4804ba4dc7a346b8de8a1bce66b0a4879c8d4b9cd2297d8cabf01

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Analysis

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