wannacry | 1db70e71afb728b64f3576a8c8ebd567cfc87203c6be2abd7adc0ebe635c0b80

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-01-2025 19:56

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General

Target

1bda83265aeaeda718ef23fca3e1fe8d.dll
Size

5.0MB
MD5

1bda83265aeaeda718ef23fca3e1fe8d
SHA1

b16681b565b5b6009fdfbe2ea2f3c0aa0603ed2f
SHA256

1db70e71afb728b64f3576a8c8ebd567cfc87203c6be2abd7adc0ebe635c0b80
SHA512

706232da2c749447de20ee0edca6732a13c7a1e93e310cc72f1e5b254a687b19ef63620f54a6e1201302d23a47d71bb0b20b9186000c7467ef3d82d4fdfe917c
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:d8qPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3269) 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
3428	mssecsvc.exe
2260	mssecsvc.exe
2344	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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 756	3224	rundll32.exe	82
PID 3224 wrote to memory of 756	3224	rundll32.exe	82
PID 3224 wrote to memory of 756	3224	rundll32.exe	82
PID 756 wrote to memory of 3428	756	rundll32.exe	83
PID 756 wrote to memory of 3428	756	rundll32.exe	83
PID 756 wrote to memory of 3428	756	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1bda83265aeaeda718ef23fca3e1fe8d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3224
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\1bda83265aeaeda718ef23fca3e1fe8d.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:756
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3428
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2344

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2260

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
f231dd1364c3e09c7885ee23750d87a2

SHA1
5ec0790003098d4775a6c462eed89d40c0a0a205

SHA256
baa194ce631063952147f72d3bab6dfb0ad45ee619ed53ed3235bb88c433d6db

SHA512
c0254e818fb87c342b2505a6392bff84e345cd4c501925dc4823db9710bc9d2d29032fc5b2b7f7a30d5263b7704c29340d6ac113f1c94fb935e85d2fdea0d4b8

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
3233aced9279ef54267c479bba665b90

SHA1
0b2cc142386641901511269503cdf6f641fad305

SHA256
f60f8a6bcaf1384a0d6a76d3e88007a8604560b263d2b8aeee06fd74c9ee5b3b

SHA512
55f25c51ffb89d46f2a7d2ed9b67701e178bd68e74b71d757d5fa14bd9530a427104fc36116633033ead762ecf7960ab96429f5b0a085a701001c6832ba4555e

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