wannacry | df0456199c797478cb69656aa6f4e8a5daa6f71001408492f1e054a29baf73aa

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
20-09-2024 10:15

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General

Target

ed5fd21a30558b59b60a50f5823d02b7_JaffaCakes118.dll
Size

5.0MB
MD5

ed5fd21a30558b59b60a50f5823d02b7
SHA1

c87961076bcb1b2fe6510a74cf09508db6cb91f9
SHA256

df0456199c797478cb69656aa6f4e8a5daa6f71001408492f1e054a29baf73aa
SHA512

784b889c5e83d323cc338865a2aeaaf5ec8252078e60b7769c8b3487e02876980922b79f7ea1e1f144756b04d314355bc2b923d9e1ddc2d21704efff9edb2b04
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp:+DqPe1Cxcxk3ZAEUadzR8yc

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3334) 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
1112	mssecsvc.exe
3256	mssecsvc.exe
2604	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 536 wrote to memory of 3480	536	rundll32.exe	82
PID 536 wrote to memory of 3480	536	rundll32.exe	82
PID 536 wrote to memory of 3480	536	rundll32.exe	82
PID 3480 wrote to memory of 1112	3480	rundll32.exe	83
PID 3480 wrote to memory of 1112	3480	rundll32.exe	83
PID 3480 wrote to memory of 1112	3480	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed5fd21a30558b59b60a50f5823d02b7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed5fd21a30558b59b60a50f5823d02b7_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3480
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1112
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2604

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:3256

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
761b22034971ddcc66139bc7e823acbd

SHA1
1e123102b616a606a6a8c0c6bbcaa8cdf0d554c6

SHA256
241b85b10f0713bdcd27f3b3bf6f03f9f2c73c38cfdd685886d920f93a9cf2fb

SHA512
2e1b9d6eabca9b13c41beede8c1f646df05f68be7680581565309ea945314d953b856bdffacc60ec2b3fcf1454c7fc7fb0748a1e91c68b4181068eed9cc1f1ef

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1df8e0eedf0e1ec8731f57a7704fea93

SHA1
f00091b2efa34f725f03e972dc4ed8842152e8f2

SHA256
1b5a31cc64fa75d5b0f287b1438a9f47ccf2ce03e72517fdf3645a2f0c7c686e

SHA512
149cb9f0177fc969c39ab2064823dba9bdaca9649bbabdc67a7b5e720ac97e56be34fc25f9041118fa98115d5a57d252aa66d28f91327649801e2b4531204d12

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