wannacry | 4f8b2591ae22c8cadaee061e46e6ad93f8912a06319b7454e19e85893fc7929e

General

Target

b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll
Size

5.0MB
MD5

b9de290ef3ec191950f0550cf6d14a6f
SHA1

8926858b8703c0a303284ce5d8ae587e42c67324
SHA256

4f8b2591ae22c8cadaee061e46e6ad93f8912a06319b7454e19e85893fc7929e
SHA512

692178874f56991ec7c3970adc05df836c9786b51646aaa651ab1163d75864f188146c92209ba3417c143d9c0b0c7a7bf922b1b9b53c815f2abc2c764558bb2a
SSDEEP

49152:JnjJMSPbcBb/1INRx+TSqTdX1HkQo6SAARdhpk3R8yAH1plA:ddPoBL1aRxcSUDk36SAEdh+3R8yAVp2

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2998) 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
2952	mssecsvc.exe
2824	mssecsvc.exe
2788	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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2640	2788	WerFault.exe	32

System Location Discovery: System Language Discovery 1 TTPs 4 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	tasksche.exe
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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 1732 wrote to memory of 2408	1732	rundll32.exe	29
PID 2408 wrote to memory of 2952	2408	rundll32.exe	30
PID 2408 wrote to memory of 2952	2408	rundll32.exe	30
PID 2408 wrote to memory of 2952	2408	rundll32.exe	30
PID 2408 wrote to memory of 2952	2408	rundll32.exe	30
PID 2952 wrote to memory of 2788	2952	mssecsvc.exe	32
PID 2952 wrote to memory of 2788	2952	mssecsvc.exe	32
PID 2952 wrote to memory of 2788	2952	mssecsvc.exe	32
PID 2952 wrote to memory of 2788	2952	mssecsvc.exe	32
PID 2788 wrote to memory of 2640	2788	tasksche.exe	33
PID 2788 wrote to memory of 2640	2788	tasksche.exe	33
PID 2788 wrote to memory of 2640	2788	tasksche.exe	33
PID 2788 wrote to memory of 2640	2788	tasksche.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2408
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2952
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2788
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2788 -s 36
        5⤵
        Program crash
        
        PID:2640

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:2824

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
78f8bf2607bd58232157b444a11f1b14

SHA1
5d82908aa114e962d48cab4ce0485740a7f27a2e

SHA256
3309eca5ad0c78fe84377bd3d30627d7f969e6542012e97a53b5dc9ed1d2f227

SHA512
40197feda797b70647716f13099a8c3993c36c0f10ee2c0215144a11fe4af1cdce0a5775b03454889ab2e17cf8c8f6da6e47eb4024393c2db536778e84546acd

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0d4019652b4a71bdfb941fe4a4b57eac

SHA1
674108e9ccd4d5ad28696a4d2d291822a07acdbb

SHA256
35e8518bd85fbef05aaf095984e0ca658595c3878c6b13dbd1ec6eab8dc64860

SHA512
b0e59c9463bad0b63e5a6bc4a09d00a0d92617e7be651c7ec5eedef06c53274f294d87da1471b3201f3cd88a7f10c5cb5b5ac019e664a08d0007d3e7dec3dd22

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Analysis

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