wannacry | 235303a669bc611ea436a4a300c3171c085cc32c0d3dad4f4c720ebe64f8c0d7

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 02:15

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General

Target
5cab58ca89303bf395a7a21c0d81b891_JaffaCakes118.dll
Size 5.0MB
Sample240520-cpxegafe5v
SHA256 235303a669bc611ea436a4a300c3171c085cc32c0d3dad4f4c720ebe64f8c0d7
MD5 5cab58ca89303bf395a7a21c0d81b891
SHA1 0354d0a4ebb2255d10f3dc68c15c74bb745fd082
SHA512 c84b21fc53e24f649103a9a1e43e6511889e9cc1a98366aa890d173f7c5be1700533bc97ed6caac0da0de895558af5fd7be5e47749f645ba254360c1c74ad15d
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRdsb53K7jSWl1y:SnAQqMSPbcBVQej/1dsNwHl1
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3286) 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
4812	mssecsvc.exe
1716	mssecsvc.exe
3916	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 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 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 4048	2780	rundll32.exe	83
PID 2780 wrote to memory of 4048	2780	rundll32.exe	83
PID 2780 wrote to memory of 4048	2780	rundll32.exe	83
PID 4048 wrote to memory of 4812	4048	rundll32.exe	84
PID 4048 wrote to memory of 4812	4048	rundll32.exe	84
PID 4048 wrote to memory of 4812	4048	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5cab58ca89303bf395a7a21c0d81b891_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5cab58ca89303bf395a7a21c0d81b891_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4048
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4812
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3916

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1716

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 d2b0cff38e4096f37fe8859fc17b5b589a4dfb7ea89dee6c6c02631d5ff25dff
MD5 7eeaacbd5f313fc56e07647f60238244
SHA1 acda2b34c4e3788a1fad97cafb6d087e19f111d3
SHA512 fe090baca777c8ccebe020f6dd577d14c259f5e53a7591466035d57c1a4520fda384d2bbf8f1d4cbf5d6746632bd0d8e1d2af49749b60d37e48d99738b37bf30
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRdsb53K7jSWl1yD:2nAQqMSPbcBVQej/1dsNwHl1M
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 dadc4dd02b14bfca85a0dfc06bf8cbace568386c5fafa35e4bb6a26d47f03ea5
MD5 e12f85b3cbc8a466ddce8dfc4034fabf
SHA1 2c4f27164c44058c4b60b45cfd67dc4f3361b8c6
SHA512 080016307b18f947629b42650221eb024b08f6cd3c692928da1f6492bb81c7ae5d8839beb79db625f1d70a41120c880fe408ddd7ca1db0e73c989c42814f355f
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kIqRdsb53K7jSWl1y1:nQqMSPbcBVQej/1dsNwHl1m
MD5 SHA1 SHA512 SSDEEP