wannacry | 50e3a3bf860227fff83b8005e6cee4d84fc88150191a732cb9c357879f4a6dff

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-08-2024 15:53

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General

Target

c113b4c6b800aaf04e97194c239760ce_JaffaCakes118.dll
Size

5.0MB
MD5

c113b4c6b800aaf04e97194c239760ce
SHA1

6808c1f69cf5b9e37188de7716c70265f44dda27
SHA256

50e3a3bf860227fff83b8005e6cee4d84fc88150191a732cb9c357879f4a6dff
SHA512

d9ae48d57a38982f035cfe4b5de93d5d94ece529459ac7ed32d9bf6ee64211c1c2526c63a8b882884064ed8d63239e78f57f275c8eeb8255dc6ae96d47ae84a7
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P59N2H:d8qPe1Cxcxk3ZAEUadYH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3299) 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
4328	mssecsvc.exe
4008	mssecsvc.exe
4784	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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 4856	1056	rundll32.exe	84
PID 1056 wrote to memory of 4856	1056	rundll32.exe	84
PID 1056 wrote to memory of 4856	1056	rundll32.exe	84
PID 4856 wrote to memory of 4328	4856	rundll32.exe	85
PID 4856 wrote to memory of 4328	4856	rundll32.exe	85
PID 4856 wrote to memory of 4328	4856	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c113b4c6b800aaf04e97194c239760ce_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c113b4c6b800aaf04e97194c239760ce_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4856
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4328
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4784

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4008

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
cfe9d8d7f313652cb6972efa2e73bf57

SHA1
557f2b513b12095a2a621cfada882271bc1d22a6

SHA256
d3580a2fe78295df8b4b5c724364c0fe326a29c595f19ab0f5a0e4ef68929ad4

SHA512
ad850f8be53558b4cb39c63cacc2f3a4c0da1e51088cff26b62abe246cabfba2e23e3f3a53f1099c2715f97020ecdbcb1f007f5c66ae8478f6bb0640f057cfe2

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
59c01fe27118952e8bd265409ebeef36

SHA1
69480ae9e6fe8c3e4bf9f28fb1930442917d60d5

SHA256
4d3edeb41200637503f343c8329e7b3c7faae031f47099247c04fa05d7ef34f5

SHA512
537798fa73c311adad9a0834cb48ce6378ebc19a9209a71dee687e35e7bdd9b8f4afa0e8c52617e9b4f60731f20f6da6f77f95b09341427648e5409195033006

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