wannacry | e79e8c14c51dc0251e22d9976e3e3bde818b6c97d7147a50ad14d305056ac8b8

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
28-08-2024 09:39

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General

Target

c699a6766bc5a0c79b2af6c029b89618_JaffaCakes118.dll
Size

5.0MB
MD5

c699a6766bc5a0c79b2af6c029b89618
SHA1

e670824bf9a744f58688bdc91fd5578d91a5f370
SHA256

e79e8c14c51dc0251e22d9976e3e3bde818b6c97d7147a50ad14d305056ac8b8
SHA512

ff8d3e06602345d21684b07927b09a17f5f1b6573aa42e67bc05bdccc62bf73c63f1a6d9d38da0e7fd252960228cfe223d9f0a4eaaf0ace3cd0c71406136bda9
SSDEEP

49152:znAQqMSPbcBVC/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:TDqPoBA1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3182) 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
2160	mssecsvc.exe
1384	mssecsvc.exe
4120	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 1924 wrote to memory of 4780	1924	rundll32.exe	87
PID 1924 wrote to memory of 4780	1924	rundll32.exe	87
PID 1924 wrote to memory of 4780	1924	rundll32.exe	87
PID 4780 wrote to memory of 2160	4780	rundll32.exe	88
PID 4780 wrote to memory of 2160	4780	rundll32.exe	88
PID 4780 wrote to memory of 2160	4780	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c699a6766bc5a0c79b2af6c029b89618_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c699a6766bc5a0c79b2af6c029b89618_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4780
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2160
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4120

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:1384

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
5cede39f2793397cf5727430afa8d8c7

SHA1
ae2166d3840809535f88bdd726c35263fbef20ff

SHA256
4c60a6581ed311c5b965ef4308f3eaa258bed6b343800b5b58eb7adedb911c2f

SHA512
174cd78a05cf4b00783bb1b1b3f56517a5eaa973a7fc5b7dfbb5e0f620acfe65c13ee1046ebcddf54cc6d57e7131d11d5708b03e6b8b34dc40dd008ae560b465

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
cf655d8557b03b1ae567295ad924659b

SHA1
92b6b8a4cdf59303b56120fbc2ec5aa1eaac34a5

SHA256
ba463bb27d46d0a3f688ce471814cb7af99350771ed90e38668d5eb9c2db2b33

SHA512
dafde0ad7597ebe3e082407a73bceb2f873821027e7bd880a632c28d1d472a1b4f872563be3d7a26393af235b381946b9f7b5b324fff8e7c51c7d2ff9ebf2a5b

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