wannacry | 69cdcc6cefa1df9d0a8937f19d57ddb411af75ce8a5b29cfbaf74a16880338dc

Analysis

max time kernel
148s
max time network
154s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-09-2024 11:50

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General

Target

d1dd845dc80fe6f800e4e573a930eb13_JaffaCakes118.dll
Size

5.0MB
MD5

d1dd845dc80fe6f800e4e573a930eb13
SHA1

9d3101570c44a5a14671d925a7468162f921aede
SHA256

69cdcc6cefa1df9d0a8937f19d57ddb411af75ce8a5b29cfbaf74a16880338dc
SHA512

6e1326a26a5a0a7efa2cf7729a8676e8a8cf2b9d431b24200b9dd3b3093ea1b6dd49d3ca81bcea0ad9e755f674aeb43a18f67f419a700c2cdf670bbc6a42ff32
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTdX1HkQ:+8qPoBhz1aRxcSUDk

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3135) 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
2900	mssecsvc.exe
2940	mssecsvc.exe
2148	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 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 2424 wrote to memory of 1688	2424	rundll32.exe	30
PID 1688 wrote to memory of 2900	1688	rundll32.exe	31
PID 1688 wrote to memory of 2900	1688	rundll32.exe	31
PID 1688 wrote to memory of 2900	1688	rundll32.exe	31
PID 1688 wrote to memory of 2900	1688	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d1dd845dc80fe6f800e4e573a930eb13_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d1dd845dc80fe6f800e4e573a930eb13_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1688
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2900
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2148

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:2940

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
e4e87d0802708131468dcd14d23591d7

SHA1
61e7abaef16972f77624bde801bdfa985f90023f

SHA256
877ba92ed382dcc72ab80070abefc329a3fd5a08abff32a3c6214f60a55f4bef

SHA512
baa6a99eae00779dda178dc761cea7be33d860cc86e91a466f36bdfcefe145aa972d2b9eadfa1278e1045bc0c88f5567cd7d822f74befbaa4919784e7549140e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7342560f7cc742fbf83d2094ca001795

SHA1
0e28003f0eb353222fe31787dfabfa0eabc492a5

SHA256
9d93290d09ab9165d687a7630de896c6eaaf950be43252b257e5caa100600817

SHA512
79b4af3796d26cee7e78c8e0874ec531b3db9795774180c0cb190f25e45df60574427411f95f070498e1117dd946133ec1471ef12051d66a2fc05835e7b30d41

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