wannacry | 976d037f34a142933712e708a799face4ebd23e2e2722baa6bc20e93405b7801

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 21:09

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General

Target

64c68765fe711f15ed352a72b840e20a_JaffaCakes118.dll
Size

5.0MB
MD5

64c68765fe711f15ed352a72b840e20a
SHA1

f3b8f06186a2ccffb0738d5f62815fc16c6d9913
SHA256

976d037f34a142933712e708a799face4ebd23e2e2722baa6bc20e93405b7801
SHA512

4b957a940b36e96b6274459682b7e7167dbd7f0cd13ec7bfface0bb93dd189e09536d8a6e25e2fb55237e6dda67e9af273bb151b69e36720906adee9f667e9d7
SSDEEP

98304:+8qPoBhz1aRxcSUDk36SAEdhvxWa9cyAVp2H:+8qPe1Cxcxk3ZAEUamyc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3288) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2356 mssecsvc.exe
2744 mssecsvc.exe
1952 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

pid	process
2356	mssecsvc.exe
2744	mssecsvc.exe
1952	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2028 wrote to memory of 2036	2028	rundll32.exe	rundll32.exe
PID 2036 wrote to memory of 2356	2036	rundll32.exe	mssecsvc.exe
PID 2036 wrote to memory of 2356	2036	rundll32.exe	mssecsvc.exe
PID 2036 wrote to memory of 2356	2036	rundll32.exe	mssecsvc.exe
PID 2036 wrote to memory of 2356	2036	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\64c68765fe711f15ed352a72b840e20a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\64c68765fe711f15ed352a72b840e20a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2356
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1952

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
a00456baf68cf8c452f268354e9739ea

SHA1
309f3bf900c3e95f70e380861ee0ce0f906c88a3

SHA256
60b9ed1475873db52cf69f243cc1267a08a5fe5801376656db8a05e9b545b6de

SHA512
810e1e232fd9b8b7c59f8d34487587e65255bd83d7883d9fffaa075203542add62848750ea27e32e0444c4c9590bb1827fad324efcfe10f0c305003f1eb380d9

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0780337a9d61e93ded040566cc78fbdf

SHA1
7bbf4c60d836abee4d85510bcd56fcf325b3d8ee

SHA256
fe726bb171b6e0966c54495a5bfe2900e209221af43461735260433a0dccb350

SHA512
ab473f8697bc8003804a165a680d14aae76e877a195f878e9f394baaeb38d2f70dd1db6d7d4c7365b5f66873b0546c16067a1a6fa43f1e85793b1758ed07082d

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