wannacry | 7b83e2b619cf6fcc242e066415bf3631c4aa87144e0d595f118f1ee97c156a6c

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
28-08-2024 19:26

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General

Target

c780695e67460a79b2f51ff3fe1e2b63_JaffaCakes118.dll
Size

5.0MB
MD5

c780695e67460a79b2f51ff3fe1e2b63
SHA1

3e6971f31861aa47feba4fdc83a47b2b7a312385
SHA256

7b83e2b619cf6fcc242e066415bf3631c4aa87144e0d595f118f1ee97c156a6c
SHA512

efa80ffd3f6fe3dc9db97956f7a1e5fadd0f87e42bfd8516db42c4fb513677a58e321871d61f1d4dbacbcdf72b969878681dd8d46727e6b083c0b0e6117da6e3
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVpNZH:TDqPe1Cxcxk3ZAEUadzR8ycPZH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3227) 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
1148	mssecsvc.exe
4052	mssecsvc.exe
2920	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 3572 wrote to memory of 3356	3572	rundll32.exe	84
PID 3572 wrote to memory of 3356	3572	rundll32.exe	84
PID 3572 wrote to memory of 3356	3572	rundll32.exe	84
PID 3356 wrote to memory of 1148	3356	rundll32.exe	86
PID 3356 wrote to memory of 1148	3356	rundll32.exe	86
PID 3356 wrote to memory of 1148	3356	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c780695e67460a79b2f51ff3fe1e2b63_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c780695e67460a79b2f51ff3fe1e2b63_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3356
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1148
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2920

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:4052

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
a3a851e54f411362285a07a4f6fa9f3e

SHA1
059d56add1505a6944e4d9897a7c1ea72481f917

SHA256
84569284fba295f43f677b85835c7cc9b262f1bceee24ee8a243cd6c1fa97edd

SHA512
c750dee59ec845f15dcbe4bc97a972a7902674088a73ae96cdc32e8f75ac2dc31f1881760de09985c3f7acdb78e58abbe9bf87a79655b5ee1b932c85d876f2f1

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
61008c022798d82b5feb2999cebd47fc

SHA1
d96a1dff1f6713d5d043a2d924324369cfbf10b4

SHA256
22391324f6b59aa7162b755428c43a3224c574f1bb4e447997448d082a887081

SHA512
8010bf1393617a9aa86f45b1c44f42f0c7fd8cd241419cff7c7e9c5a0e5da54e677842cd818be3965f9dbb2f53b3a4b65a25c53d0fae383714b002471b1aefb7

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