wannacry | d6cb63f23b784915ebd8ac1b195c46251fa1241b324beb99a61d7c4ba27ea99b

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 06:56

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General

Target

c27ecb1de9ca748605af567237eeed4f_JaffaCakes118.dll
Size

5.0MB
MD5

c27ecb1de9ca748605af567237eeed4f
SHA1

f3b0fed4b1ba6da067663fed061d1ba03c883ab4
SHA256

d6cb63f23b784915ebd8ac1b195c46251fa1241b324beb99a61d7c4ba27ea99b
SHA512

97b1e363a8a8685d796aa87d65f219a8b41713bc8927e3bf05405741659a097008bce261b8746b1d63faf5516ee3ac0a283fbdc7f17060e16617237150c8ebae
SSDEEP

24576:JbLgdeQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAd:JnjQqMSPbcBVQej/1I

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3283) 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
3016	mssecsvc.exe
2344	mssecsvc.exe
2164	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 1484 wrote to memory of 3004	1484	rundll32.exe	30
PID 3004 wrote to memory of 3016	3004	rundll32.exe	31
PID 3004 wrote to memory of 3016	3004	rundll32.exe	31
PID 3004 wrote to memory of 3016	3004	rundll32.exe	31
PID 3004 wrote to memory of 3016	3004	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c27ecb1de9ca748605af567237eeed4f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c27ecb1de9ca748605af567237eeed4f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3016
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2164

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:2344

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
58307b57d8768dd4392b17dc94261221

SHA1
7c972e40f96b3980f9e012a7c6db243d3a35f834

SHA256
d21081d828e9cbf42d91850ccf4a6acef2be17892528987392f5a16bf84e99f1

SHA512
05dc925cf6dfbfec780326791418c31986765d83d43818d1d9a5d3d37d2bbe7f4d374c63d888f0346797bb933052c6bf2ec275cea8beda4e87e754a29f3e5c5d

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
47a2a3ed83a3e4b42b339434b8d7795b

SHA1
6bf51b555fe4784326d2c0bff717d228b5789311

SHA256
eb5b0fa26712e678240a0c7fe2fdbb218763ad6b7b8b757d25dab9c5d2879d84

SHA512
fe487c6ed2ac7b9380e6d2abea5f7002c423bd4ae5ebec22c94622a62629b259905e21a80e7412e7a5583af299fa10def210f6f6c3c295e838636f885fa77014

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