wannacry | 740f5a1c574ac7cad6134438ffef5b8b4c07aad1167c15e9043aeeffa444b46e

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 14:29

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General

Target

edc9d46d513eeea22b8c6fa189bc20bc_JaffaCakes118.dll
Size

5.0MB
MD5

edc9d46d513eeea22b8c6fa189bc20bc
SHA1

cfa3c5b8897e50a64779efbd858b52fba93398ff
SHA256

740f5a1c574ac7cad6134438ffef5b8b4c07aad1167c15e9043aeeffa444b46e
SHA512

88dc79e91da48292fb4b02ca47df24fba14a78a90a9951f448ee1a6adc2f9eaf28bbd5ad901dfd4cfd42be5b3d527884254faed0d2b1caa090324416182ab6fa
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAFEau3R8yAH1plAH:+DqPoBhz1aRxcSUDk36SAT3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3169) 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
740	mssecsvc.exe
4296	mssecsvc.exe
5032	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 2664 wrote to memory of 2636	2664	rundll32.exe	82
PID 2664 wrote to memory of 2636	2664	rundll32.exe	82
PID 2664 wrote to memory of 2636	2664	rundll32.exe	82
PID 2636 wrote to memory of 740	2636	rundll32.exe	83
PID 2636 wrote to memory of 740	2636	rundll32.exe	83
PID 2636 wrote to memory of 740	2636	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\edc9d46d513eeea22b8c6fa189bc20bc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\edc9d46d513eeea22b8c6fa189bc20bc_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:740
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5032

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:4296

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
8d8e570963a3830c6ff64fefe63325d6

SHA1
26125342a00ed04093f8029d136044c45ca1f01c

SHA256
604f887261051ff600b64e91e67da9cc81f319da7799ab108d962767301b3ec6

SHA512
2232186b825e3b653c7d82dde2d82a9b81c1ade122f8b2e09595431e7c2672b1a930221f73392ba8fed585884804f251283d424ca15fc5807584dacbd3459ff4

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
de1122c376513f37fdd353dee6999a9b

SHA1
e91b041853e55b05fa148ff7c225e2e5871dfbca

SHA256
15c1de7a235b5a493a60f8892ab8f9ab8990526937483f7dffb0ee9f0690e421

SHA512
bccc8692352b40812c35c7da150ed5bc99977f9a286f5b072db98fd84d772257aa64185c311c61a5313b8d0b76f2fcf2628a446f51a1285efc0c9edf7667b9f3

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