wannacry | 2a2cf60ecf5fded877ac54be621a6ff5eda5e21c1c831d7db64e3186470e4bff

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
06-09-2024 14:15

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General

Target

cfb8e24c51476d67124476d7f9ab734f_JaffaCakes118.dll
Size

5.0MB
MD5

cfb8e24c51476d67124476d7f9ab734f
SHA1

764d67ff69b5e42e16020f13fd82640ab53ddc7f
SHA256

2a2cf60ecf5fded877ac54be621a6ff5eda5e21c1c831d7db64e3186470e4bff
SHA512

0ba182bf7c3bd92fd00cde395989971104833f026e95276c003bc4180a0d51076fa721d8c85dee9d2a916897387ed120a0854f80bca5e2c0f0b0f2e02f7b510f
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626nq/:SnAQqMSPbcBVQej/1INR

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3293) 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
944	mssecsvc.exe
3000	mssecsvc.exe
2472	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1472	2512	rundll32.exe	83
PID 2512 wrote to memory of 1472	2512	rundll32.exe	83
PID 2512 wrote to memory of 1472	2512	rundll32.exe	83
PID 1472 wrote to memory of 944	1472	rundll32.exe	86
PID 1472 wrote to memory of 944	1472	rundll32.exe	86
PID 1472 wrote to memory of 944	1472	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cfb8e24c51476d67124476d7f9ab734f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cfb8e24c51476d67124476d7f9ab734f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1472
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:944
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2472

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:3000

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
ceef6befba88192fe8c05d895feec40b

SHA1
77eda95533a18400d98401e95ab9b93f3f5ecb64

SHA256
941a998d4c4b9ed2edd9bd4104de5f09cd4c2ccc3153c2cffeb4fc16d2103712

SHA512
64ff97aa8d20d5f3e079ca0d049b0f827a8b0a8fbf64590bf83a835fe67205ef55abf1d0cc72de08866c80883b04e76bc9653e6efa70a53c5f7cfa9bac7b6fb7

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1c891306d05a78f677ceb8a9fc18cece

SHA1
153f3c1b155c832d367c50f5e7beec8100bebf42

SHA256
fef3fca8124aadc5f54578ec457be4765bebbc208091db56e827a3ae7a78b2d6

SHA512
e05f7ffa0ac1f9c40e7b55954efe0637ee88dc57512860284d9305ce8a8d17b19ccdd33528b4f77317af94c9dac172de51bbc959b9667d03ea7912a68159226b

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