wannacry | f5e0b725d2fb35c1b4a9a2ac6efb3d4a3e7aa9fb9422022bc19082ef8190128e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:31

Target

6887821d151dc76e97740655d040af67_JaffaCakes118.dll
Size

5.0MB
MD5

6887821d151dc76e97740655d040af67
SHA1

0d7915053db68cf89ac984975fe5eebcf4c0dbc7
SHA256

f5e0b725d2fb35c1b4a9a2ac6efb3d4a3e7aa9fb9422022bc19082ef8190128e
SHA512

bc1b6362d6f018cc43cf2f52a178ee20251d1099169c498e37216c82961291d3be91dc667866067a7cd809f6e9cbb39a1a9b0773b09c726136f6743597137218
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0qMEcpcL7nEaut/8uME7A4kqAH1pNZtA0p+9XEk:SnAQqMSPbcBVqMEcaEau3R8yAH1plAH

Score

10^/10

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3324) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2580 mssecsvc.exe
3552 mssecsvc.exe
4948 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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 5104 wrote to memory of 4032	5104	rundll32.exe	rundll32.exe
PID 5104 wrote to memory of 4032	5104	rundll32.exe	rundll32.exe
PID 5104 wrote to memory of 4032	5104	rundll32.exe	rundll32.exe
PID 4032 wrote to memory of 2580	4032	rundll32.exe	mssecsvc.exe
PID 4032 wrote to memory of 2580	4032	rundll32.exe	mssecsvc.exe
PID 4032 wrote to memory of 2580	4032	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6887821d151dc76e97740655d040af67_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6887821d151dc76e97740655d040af67_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2580
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4948

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

C:\WINDOWS\mssecsvc.exe

Filesize
3.6MB

MD5
9d33bfa57dea52c3d1d21c2a0bb2bfc3

SHA1
1711cd3bbb91d1f82a5d9a465171343046f1f6bf

SHA256
e130372fc98f52cc794788940b75c8fb11017bbb64d1df9849752c23060ccd41

SHA512
38e431417bb941ccb21c29ad02068d5b6c6ec5bee451b4193cfdc6753b3332fe4bc8f9ea54a46b503fa8220e1d02d28d13b380b81ce3e4ee4d1436bf23ee4c7a

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
19cbe6b8c799727886ca99a69a320004

SHA1
da6f79f66ee82ca61c36d2b29ff09f6d474eabc6

SHA256
66d93625cd977147c28dc0bd091586fe6d5149ac9b8da6c89eba0b849f19bb62

SHA512
e70312e1cf2de6f5267aeb5e0a1572c2bc3fd436c1770d9d8c046cd08521e903baac9d3d650d255d968741de6b52ac33f99cedd069ab560f1ec5cf5feca2620e

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