wannacry | b4418dc00381089e32d75414a3f31d823d3cb08f7066b4f7ec1aac34e77f1fb2

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
16-07-2024 08:47

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General

Target

4d9810bcdc87117c5d16b22370d3be89_JaffaCakes118.dll
Size

5.0MB
MD5

4d9810bcdc87117c5d16b22370d3be89
SHA1

91e1b3b035521ea6a3a989c4e0930926704de672
SHA256

b4418dc00381089e32d75414a3f31d823d3cb08f7066b4f7ec1aac34e77f1fb2
SHA512

7bd922b367d66db8029ac4068f1393ff70cf365d3fa0acd3ba7500492650cd84d248ec776b8070ba9a2f713a71e44c020582d2b05780fd776d9078234849ed09
SSDEEP

98304:d8qPoBhz1aRxcSU9k36SAEdhvxWa9P593R8yAVp2H:d8qPe1Cxcfk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3266) 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
1204	mssecsvc.exe
2928	mssecsvc.exe
2216	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

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 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2316 wrote to memory of 2376	2316	rundll32.exe	30
PID 2376 wrote to memory of 1204	2376	rundll32.exe	31
PID 2376 wrote to memory of 1204	2376	rundll32.exe	31
PID 2376 wrote to memory of 1204	2376	rundll32.exe	31
PID 2376 wrote to memory of 1204	2376	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d9810bcdc87117c5d16b22370d3be89_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d9810bcdc87117c5d16b22370d3be89_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:1204
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2216

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:2928

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
2b49976869562fc44b9405d132b2cb26

SHA1
fa0d549c7013ccbedbb745715c87c465ec56bb2d

SHA256
f30ac050843a04a6815a60527f4b3055461be7204cd8da2b70ee574a455a3f0c

SHA512
8350d54dc31a17858a099176448a85730e36cede298064efaae526e2655db6a4fb97828654a00f1601178e66a197c61be8cfc0eec5ea756a257a6684367a3e05

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
6e96c944eb1bef4c71efe26b32b07557

SHA1
15205cb6303a3cf85610d88034aecd0eaeda0302

SHA256
7bada019acdd0e6ece41ee34f66d7d20121a59f526015790d582829715055b1a

SHA512
1430ac66e62850014b390df1a89b256cc08f33e6fedd22781bd7ff31263c838bf5b8744d149d06e457b38d1270a94bda966b10fccfd5de4ec5bc1c3d22332bfd

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