wannacry | b10fedc2ddaeed43c2ca040123d060ec5af0fefc1a4ddc24f0b122b6734b8d86

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 17:15

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General

Target

c3771d736c9c8811ee5e44cbd533bc60_JaffaCakes118.dll
Size

5.0MB
MD5

c3771d736c9c8811ee5e44cbd533bc60
SHA1

3001f0d67b254b9fac910b8dde2ee6bc29977b3a
SHA256

b10fedc2ddaeed43c2ca040123d060ec5af0fefc1a4ddc24f0b122b6734b8d86
SHA512

c7cb983880d3c730ed66ec7d437e55dfd2e16ba0cda82e9b09c25a845930e6240e4b774ddbaf7d0c1854cf20c085b1bfa668e4d39921e7563ef908b418416747
SSDEEP

98304:+8qPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2owc:+8qPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3328) 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
2888	mssecsvc.exe
2324	mssecsvc.exe
2412	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 1 IoCs

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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2516 wrote to memory of 2544	2516	rundll32.exe	30
PID 2544 wrote to memory of 2888	2544	rundll32.exe	31
PID 2544 wrote to memory of 2888	2544	rundll32.exe	31
PID 2544 wrote to memory of 2888	2544	rundll32.exe	31
PID 2544 wrote to memory of 2888	2544	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c3771d736c9c8811ee5e44cbd533bc60_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c3771d736c9c8811ee5e44cbd533bc60_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2888
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2412

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:2324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
cf12d9c5bc57c6383a318f8706b8ad43

SHA1
23160aca16fcfe713bf6a57be1d9d030434fb087

SHA256
38d2b8c6e99de6bfc9cd5cd44d66123601e384caaaf0a885ab631c6ca156679f

SHA512
a413d38c7c4b8c7cb4f96b077ac6fa37963f844a2910ee394b4c3adfcb62614d5f63b4ea6ce8aedd645fdd9bc1d464bee0972baab77c33e6301beb750e8c362d

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
34e1278bb4509b217a58a294a596f1bb

SHA1
7aaf59e4b55c4f7f2095f98a16f1f196f7ce489f

SHA256
548d1c00a50abc1fed1747c4008defea1e85486def98ba1d22849c09309c77da

SHA512
47d24811a166abbc627ebef64e5cb8a88aa58f9a192f6f8020163702d566fd78947753cb47229f2a1bb591bcd3d012269277318e04db33575c76c1f1d5d2682d

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