wannacry | bc5960a807ee9f35af74ab06073bd065d3f2a87d67fc58863b50fd1197956350

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
08-09-2024 21:48

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General

Target

d524d4b17205401aa61fc56eeb61be41_JaffaCakes118.dll
Size

5.0MB
MD5

d524d4b17205401aa61fc56eeb61be41
SHA1

af87d7c905af5785222af04e4bc1d59643dd326c
SHA256

bc5960a807ee9f35af74ab06073bd065d3f2a87d67fc58863b50fd1197956350
SHA512

cd678ab08e7dcf30a55926220c824882bf5be6a7a79057f3f741b8c0a8b4db9a382041a7a6821d1c1dd4f19d9bd36d921205af8b49470f02a28c78bd890e4e7b
SSDEEP

49152:znAQqMSPbcBoQej/1INRVCRdhnvxJM0H9PAMEcaEasGs:TDqPoBwz1aRVWdhvxWa9P5PG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3357) 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
3148	mssecsvc.exe
2832	mssecsvc.exe
2132	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 1708 wrote to memory of 3716	1708	rundll32.exe	83
PID 1708 wrote to memory of 3716	1708	rundll32.exe	83
PID 1708 wrote to memory of 3716	1708	rundll32.exe	83
PID 3716 wrote to memory of 3148	3716	rundll32.exe	85
PID 3716 wrote to memory of 3148	3716	rundll32.exe	85
PID 3716 wrote to memory of 3148	3716	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d524d4b17205401aa61fc56eeb61be41_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d524d4b17205401aa61fc56eeb61be41_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3716
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3148
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2132

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:2832

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
ecbbbb5933736537e43c72497ccc509b

SHA1
d16d183b1105fc16d7a11c5150b91440aa605dbb

SHA256
40eb1a9c33922419fddc720bb59f27677c862d80b2be4a3fe3d12944c1f80100

SHA512
bf4beaa93a7e8fae22a31002ba6471484931337f049487272ecef14b0fc3bdf818cc6a757378809b322c48d8c110faafabe83826ff83d0f2ea26c9e6835f7083

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
27248738a5c1a607fed8b06d6a742a07

SHA1
e92375e7737f6f9f5d0296875a39ce822d7294c3

SHA256
8b5a0f303e139f9193477cbfd7d5949db30f9270bcbc56f93776efd5980e1af6

SHA512
545d85a2172895575bfcd150e30ba0946ea4fd38d027b82c50bbe98730f838ffdab34b7f75a6814a1bf3f45f8112ae609541a82775240f584b6cb5bf772bc6fa

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