wannacry | 5ca8b9ac8b109abd234db6368154665e437049bfdc992c3c80618927a85480e9

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 01:23

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General

Target
8c71fa95241242f37fbb5aacc7bb8b1d_JaffaCakes118.dll
Size 5.0MB
Sample240602-brzf6see97
SHA256 5ca8b9ac8b109abd234db6368154665e437049bfdc992c3c80618927a85480e9
MD5 8c71fa95241242f37fbb5aacc7bb8b1d
SHA1 ef18845b9b8f0c4ff4d2a3c784651443ba120ab3
SHA512 36d34ad3df52cc3911112d5be248d264a204a1b8c01427e98d8d2f698347c5bdc63e1efad1a86a9108bf280762260bcc09542a6093efdbf339b38c467227c754
SSDEEP 24576:zbLgddQhfdmMSirYbcMNgef0QeQjG/D8kI29PO6lt/8uME71NZtA0p+9XEk:znAQqMSPbcBVQej/N9R3RhlAH
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 (3339) 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
3968	mssecsvc.exe
2020	mssecsvc.exe
1684	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1164 wrote to memory of 4268	1164	rundll32.exe	83
PID 1164 wrote to memory of 4268	1164	rundll32.exe	83
PID 1164 wrote to memory of 4268	1164	rundll32.exe	83
PID 4268 wrote to memory of 3968	4268	rundll32.exe	84
PID 4268 wrote to memory of 3968	4268	rundll32.exe	84
PID 4268 wrote to memory of 3968	4268	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8c71fa95241242f37fbb5aacc7bb8b1d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1164
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8c71fa95241242f37fbb5aacc7bb8b1d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4268
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3968
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1684

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2020

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 386e6d2538a6b4d045904bee628f391cd9a26c9fbf781cf454aa50bcb5dd8aa7
MD5 36d3544fcb2a73f026f9ce0b547a390d
SHA1 e96e17e80b062e08f15a61ad5039942139b880f2
SHA512 9818d0edd1cf4c3bc49435aab7af6ec5573051b04d9ee88591bfecb8afbb8e02c134c49611fe9ae9b70e3ddc2bd35652ad5cab34085a19a0eb3f231df6b9cbd9
SSDEEP 24576:XbLgddQhfdmMSirYbcMNgef0QeQjG/D8kI29PO6lt/8uME71NZtA0p+9XEkI:XnAQqMSPbcBVQej/N9R3RhlAHI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 7f4a7782d398f0aa0be22a622aba1522abfd1892461fd7c07c4e3ab41abe5103
MD5 2e9c41c8c4c8c4862b4bd67341e07f86
SHA1 f3c7993c7602a2a8fa8ecc44550a04ad32db7bbf
SHA512 2af90a8d8794bd9d923aab8d8948493065a71db4dc51c6ddedc7ed751f85ed7e2134e0f782ef54a96cb9f34fd766b1db214c1695cae75aeba88d92ac02ea53cd
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kI29PO6lt/8uME71NZtA0p+9XEkj:nQqMSPbcBVQej/N9R3RhlAHj
MD5 SHA1 SHA512 SSDEEP