wannacry | 883724cb261e190d56d9d07b33538157d4f9cb8c1c0b8f943058444544ddfe7d

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 11:38

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General

Target

f5edfb2c732e903f70e6f59b95b11337_JaffaCakes118.dll
Size

5.0MB
MD5

f5edfb2c732e903f70e6f59b95b11337
SHA1

896bee860f09bd7a8afe993ea4e5930ebe1d0184
SHA256

883724cb261e190d56d9d07b33538157d4f9cb8c1c0b8f943058444544ddfe7d
SHA512

c1283596f13b3d5b64f1dcc88d55fd06e6ff3a1444787b09639e3e6bf6f3b6b723ab927c37d7eec55cd1277da33823584b224ccbf207f506b55e220c41b3dd78
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAME:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3255) 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
700	mssecsvc.exe
4744	mssecsvc.exe
2028	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 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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 5032	2804	rundll32.exe	82
PID 2804 wrote to memory of 5032	2804	rundll32.exe	82
PID 2804 wrote to memory of 5032	2804	rundll32.exe	82
PID 5032 wrote to memory of 700	5032	rundll32.exe	83
PID 5032 wrote to memory of 700	5032	rundll32.exe	83
PID 5032 wrote to memory of 700	5032	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f5edfb2c732e903f70e6f59b95b11337_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f5edfb2c732e903f70e6f59b95b11337_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5032
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:700
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2028

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4744

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
bcfe18815382d5d14bcd57c1df126da7

SHA1
d73879391096217b18f57ee3a14e863f1eae7554

SHA256
de5c754ff8e64887297554047008b2aaffcc3b8a109cfe2c902a86d360006250

SHA512
503babe036e6b2eb26fe35457920a511c8f1d645b99ac62b16484578c5254a31d8e396a261065f1594b5de0a0c795f38b5cc78fc9571ddaed28b5573b8664723

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
17f4431421c689b216d1e0407d68cc6e

SHA1
ed6e9893eef369aa2285b14271900766d77bbae4

SHA256
4190bfd1100c9800f8fdf3eaadafe69bb3450d680d0136d2b430882578ef8e37

SHA512
96c03ac3d5841c271f61c3dd47c48adae45d9e560aecb45fad5c84612e9a4ac5486f20fb96ceb759567cb9f2df4572d02c3da00fe9492e40e6478eb28d38b287

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