wannacry | 8ffcc92790fd2594db8fd0f6fe5716ba694dff01df2638bd0eb0d63dbda55143

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
27-08-2024 00:43

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General

Target

c417bfff535fd0752037f1037ca0703a_JaffaCakes118.dll
Size

5.0MB
MD5

c417bfff535fd0752037f1037ca0703a
SHA1

c9c91fd6cb67b0ae332e2baaa698c0403e11ca7c
SHA256

8ffcc92790fd2594db8fd0f6fe5716ba694dff01df2638bd0eb0d63dbda55143
SHA512

17b0be134dbfccd831a1900dfff4ef6b4067f52db282780504a38df372bf0852fcb1153981253e3532428679d9a2a9b7f5c1904019934a17309ad478ca0113b2
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTfdhkvxJM0H9ZFMEcaEauvAH1plAH:+8qPoBhz1aRxcSUfdhMxWa9M9vAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3324) 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
2120	mssecsvc.exe
2448	mssecsvc.exe
2292	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 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 2472 wrote to memory of 1956	2472	rundll32.exe	28
PID 1956 wrote to memory of 2120	1956	rundll32.exe	29
PID 1956 wrote to memory of 2120	1956	rundll32.exe	29
PID 1956 wrote to memory of 2120	1956	rundll32.exe	29
PID 1956 wrote to memory of 2120	1956	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c417bfff535fd0752037f1037ca0703a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c417bfff535fd0752037f1037ca0703a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2120
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2292

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:2448

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
5f359210280158e179f3532e287694e8

SHA1
7daf6f8ed8ac067318c30f78d41dbc6889c42ffb

SHA256
c8a7a2ef4b6c48cbe04dadf9b44204abce8e7b362bb81758e5167fcc79ee94d2

SHA512
8a425ab1856548e9c088e37138044648a112ea4e667212720fd373ed860551d0e985be82c1d6a99008050313666a7d01f1370a791ddafa70abff65a670f294f6

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
3b8da6671eff1d3af5f40b5dd832ffd4

SHA1
19c539bc5ae822aaf15b0a9b896238a4ea094cff

SHA256
c7c6d3e6b371ae7068299b68b040d6f15f288676c32e8873edae45b06fdc36e6

SHA512
e42e2b406342326c6cfd44fd7618f4a74f75bb58253c982639361f146fa358ae8eaf7b8144246e480bedc724299eac9e5e52694564b60611b7278ee87b709e2a

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