wannacry | 64b76a1eafe03c69e518b6955a71fa242408a83342411a671adf6c844fe35b8f

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09-09-2024 00:10

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General

Target

d5586514ecf97f4c197d3b6a7090e9d7_JaffaCakes118.dll
Size

5.0MB
MD5

d5586514ecf97f4c197d3b6a7090e9d7
SHA1

889a3dd2e709ec7b6f36e22847a62ca662def1ac
SHA256

64b76a1eafe03c69e518b6955a71fa242408a83342411a671adf6c844fe35b8f
SHA512

fca3b1b8c90facca1df5f90bab3bad4396d8f4afcc2dedfbae677b3ce7de25d50f5d03b2d7020b6758c0bdc857710c0219620f3c40d55ac550f4922c258d51ce
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593RHyAVp2H:TDqPe1Cxcxk3ZAEUadzRHyc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3260) 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
5024	mssecsvc.exe
4104	mssecsvc.exe
2240	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 4572 wrote to memory of 2528	4572	rundll32.exe	83
PID 4572 wrote to memory of 2528	4572	rundll32.exe	83
PID 4572 wrote to memory of 2528	4572	rundll32.exe	83
PID 2528 wrote to memory of 5024	2528	rundll32.exe	84
PID 2528 wrote to memory of 5024	2528	rundll32.exe	84
PID 2528 wrote to memory of 5024	2528	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d5586514ecf97f4c197d3b6a7090e9d7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d5586514ecf97f4c197d3b6a7090e9d7_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2528
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:5024
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2240

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:4104

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
e8d37c58e78ccb2ddbc390651d981b12

SHA1
740bd3341989dd4ad98ab18a5093674378d5bb1a

SHA256
a329b968b5b62a4f8697bfa02999e684ee59c45fce5c492a515663787289caba

SHA512
035914c03495a0893d3cc84235ece0afe93a0ca5c7fc07c7985791d1ce9e4c83830b7fc6786c3c73614c647e023f68d597a20e4f6c4a44e9a348bd665a85d70d

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2d0af9ee9c631bcb324eb06de5b4bea1

SHA1
38e1e74a2a926235837b6fbf0c5cb41138b412c2

SHA256
39817c311999a9d67e445b7248cd7a719daa13cf124474cbc28009be1a6a377d

SHA512
5201a773f0f4a2394a23a5697248b0822092af6fad8246fa9856c2c386aacbe630eb0d7d63a28e74c3a957de0df171d537f0870be0b1010559baa05238a95c2f

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