wannacry | 0508663d47a636e664cd5ff522ed5d12e13a4f00746f827a5e2be7371776794c

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 08:06

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General

Target

cf128abdd4791c364f29b7bd097036b3_JaffaCakes118.dll
Size

5.0MB
MD5

cf128abdd4791c364f29b7bd097036b3
SHA1

7eb870e87aec78dd12d6c3bf79b4127978098082
SHA256

0508663d47a636e664cd5ff522ed5d12e13a4f00746f827a5e2be7371776794c
SHA512

9b531417a08033dbb987612e0f9c31981805864eda583903a3cf86a2b3861b3febd7b66456ff8c7f972d895da4ce69f49baa1a69b5ffb8ed6a8cb37f154c5808
SSDEEP

49152:JnjQn3GTCufzZ2FYp/P/G8twfNh6eadHWA:d8WWG2q/P/FwfNgeg

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3289) 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
2828	mssecsvc.exe
2712	mssecsvc.exe
2320	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 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2688 wrote to memory of 2664	2688	rundll32.exe	31
PID 2664 wrote to memory of 2828	2664	rundll32.exe	32
PID 2664 wrote to memory of 2828	2664	rundll32.exe	32
PID 2664 wrote to memory of 2828	2664	rundll32.exe	32
PID 2664 wrote to memory of 2828	2664	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf128abdd4791c364f29b7bd097036b3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf128abdd4791c364f29b7bd097036b3_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2664
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2828
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2320

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:2712

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
c8342562d20c96410e32dc47ff4cb57e

SHA1
dad76af569e4af60e0af9870c89437aaa164626c

SHA256
8216c32f161f093a25265159b68035b631e4b1fe4526bd190dd3259c8ddef7c8

SHA512
87102695d0cbfd58eb94cffa9f0454b68f2581eebf531414c843c640bdf3d7ca4419d47b51f9970b66c3be487e82def8c8bf6f320b545a6081e1b6bd70538e92

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
65afae4daecf6d34ffe96b41b65a1d18

SHA1
19bf1779b298c1206a7606965f1a8192d646b273

SHA256
4b2aa4c230f02703bd5a848bbaf5a871b55ce568f745bc09ed8c28203ad4e962

SHA512
904e3c92c8d170ebbfbbf47f9072ef703215706b8db3dd90a9ef59ee5b3fb8fce82c6ccc292732deff26aadd79cb0eb2efd86c1b547f775b9e1dc0e6dab48c04

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