wannacry | 11b03cfbbd729b24efca4977e03cc469079265ebdfd2811cc8626fd85c6a7ec5

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
10-09-2024 12:44

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General

Target

d84b4ffd93cd5a2b5581a7d06965db3c_JaffaCakes118.dll
Size

5.0MB
MD5

d84b4ffd93cd5a2b5581a7d06965db3c
SHA1

4864f857649abea6352752d9ffd2e966e41cae2e
SHA256

11b03cfbbd729b24efca4977e03cc469079265ebdfd2811cc8626fd85c6a7ec5
SHA512

fa8c6da6315b4b0d3a20fabc34d992afb9babc9ffc73ca53871fcbff856347f8ec25203936e13d4acac76d8489d2e3b5bf6f894cca4a4c07cd338cca9b74bc40
SSDEEP

49152:SnAQqMSPbcBVWRdhnvxJM0H9aEau3R8yAH1plAH:+DqPoBUdhvxWa9n3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3317) 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
4156	mssecsvc.exe
4088	mssecsvc.exe
1600	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	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 5 IoCs

description	ioc	Process
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\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 5064	2104	rundll32.exe	83
PID 2104 wrote to memory of 5064	2104	rundll32.exe	83
PID 2104 wrote to memory of 5064	2104	rundll32.exe	83
PID 5064 wrote to memory of 4156	5064	rundll32.exe	85
PID 5064 wrote to memory of 4156	5064	rundll32.exe	85
PID 5064 wrote to memory of 4156	5064	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d84b4ffd93cd5a2b5581a7d06965db3c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d84b4ffd93cd5a2b5581a7d06965db3c_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4156
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1600

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4088

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
73066cb0b124925b94d56cad03e8d924

SHA1
e3dc4b59bb59ea7f112c2915f8ad08a08b98471a

SHA256
36523446dfe614180f546f07be678e5ca1fcdb1af603b6367b2f7063c9389c30

SHA512
760055d5f169d2973f769672a57eb303b20e1ebb242e8d24df10b76df636612399a65c9ab9667c7e374179506c0578423c2eb11d0f2943498d57c47cc2cb2024

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1baa65378f18f5fa8af049362c856994

SHA1
737d21e1623acb763e66177b13e8c5cacb03f2fc

SHA256
606476618eaec9bc7850d7c37e91bd7bbd2314931d76dd0e75e3e69d3355ff3d

SHA512
b246eb364f951422fc88529997efd3875a09fdec701e088b700dbe526581fccba830f5b4e95f83757bad50660bef7dd30f9b628ec20a94ad066ff8442a95047a

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