wannacry | c3f2e0f4d75c0cd434aa2c67592dd63cce88785337448a1a6e07b288c35d2e59

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13-09-2024 20:37

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General

Target

dedb733526d470764804c1336ad7826c_JaffaCakes118.dll
Size

5.0MB
MD5

dedb733526d470764804c1336ad7826c
SHA1

4a09a6c2f70cb72d54b30012a2da5797c36381db
SHA256

c3f2e0f4d75c0cd434aa2c67592dd63cce88785337448a1a6e07b288c35d2e59
SHA512

835ef81d9b64dc1e9160ec44fd6335e01d45b890dce79e976cac41b7ed554340621212d3a944e8eafc285ceb414c80271a2dae79440863449882027620013f34
SSDEEP

49152:SnAQqMSPbcBVQej/aAMEbaEau3R8yAH1plAH:+DqPoBhza5a3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3246) 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
4900	mssecsvc.exe
2292	mssecsvc.exe
3340	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

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 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 872 wrote to memory of 4412	872	rundll32.exe	83
PID 872 wrote to memory of 4412	872	rundll32.exe	83
PID 872 wrote to memory of 4412	872	rundll32.exe	83
PID 4412 wrote to memory of 4900	4412	rundll32.exe	84
PID 4412 wrote to memory of 4900	4412	rundll32.exe	84
PID 4412 wrote to memory of 4900	4412	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dedb733526d470764804c1336ad7826c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:872
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dedb733526d470764804c1336ad7826c_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4412
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4900
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3340

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2292

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
e8a7cc07f9766c9873cc2146766cf1e9

SHA1
6ccf9bb08cec405b50b7787bf2b71a94b18ab5ae

SHA256
9b7d66190d08fa83794d816d4836a6c69de15aaffa1fdc3c8104b7baf8f7e70e

SHA512
7d3042e4c9506af30bda4400de0636cbc334555b230b793238a1d5e46457aefbaaf3540f96632100c4bd0216879f99bf198f9e8c2b94b5e4e3039ee057cedcbb

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
9f4314682bba3dff34732a57e895e724

SHA1
260fe6537435359421aaf1f1e26f0d54000cc8b1

SHA256
07fa4525ce76f4cd00e2fad66cb65e56cf452679528c4e74440a423029297c06

SHA512
f9239565ea35de5be797907f6231e7f9e0ad28ac67183ef38a5c99f33a744325275ce7796a2d90cf6cc6241f79bfadc78dfea699a2910128b00ae26368696a80

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