wannacry | e51312acc7bb484f92e75cd7815415bb0912fc69964f5b26db6b2a2a78ee220b

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
11-09-2024 05:40

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General

Target

d9b74eee31998e83fdbda390976f0478_JaffaCakes118.dll
Size

5.0MB
MD5

d9b74eee31998e83fdbda390976f0478
SHA1

30cf09c8e6408832f906b9e599780c8152a6cc0d
SHA256

e51312acc7bb484f92e75cd7815415bb0912fc69964f5b26db6b2a2a78ee220b
SHA512

81f9df85b8988ce8072989b109b6249ffaf61c9e2ff76be161962e9a677e7b59463459da8a11feb681be5bd43103f3fad058fea1e1306feb9767994c6b2ee130
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQ:TDqPoBhz1aRxcSUDk

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3311) 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
4904	mssecsvc.exe
2568	mssecsvc.exe
2952	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 3664 wrote to memory of 1544	3664	rundll32.exe	83
PID 3664 wrote to memory of 1544	3664	rundll32.exe	83
PID 3664 wrote to memory of 1544	3664	rundll32.exe	83
PID 1544 wrote to memory of 4904	1544	rundll32.exe	84
PID 1544 wrote to memory of 4904	1544	rundll32.exe	84
PID 1544 wrote to memory of 4904	1544	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d9b74eee31998e83fdbda390976f0478_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d9b74eee31998e83fdbda390976f0478_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4904
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2952

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:2568

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
244984b4d507fd1fcf405c46504ae113

SHA1
555a8937fb1fd248e818227b2cd86ad19bbaea74

SHA256
b49139f4c29eaa95d3f188b348fbe8c17cf0f4359a9948fe673b8ba075f5da85

SHA512
9c0390c771390102f97f3d16b9e4f9facdee9d44883a02811ff12c9fa27c184049fb7b8ea4aa4b469c8b839faeb36d5a08e70811ddf84333f61c17edded5f240

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2c8472da3bf7aea7575f62975e0d1c4e

SHA1
1bdbbd87f440db805fd0912cde7f23eebd7a6ecd

SHA256
2a963939c6b31e6a8a7de7ce96e1e6130639e046d3a2377e8ee5009f50c12a29

SHA512
5cdf476e9f9f397193fcd77b5ef1816b6449c6fa7fac208e7241f3aa57e94b9ec633a8d0a1271365b67e5524e9d8210bd3bb54d796b7101d91378408f344645e

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