wannacry | 0fad304d3f2651eb3978f2ee99cb9d2de3b34696780b0d5f0991eca03ef81725

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
24-09-2024 10:40

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General

Target

f375b7c1c976f31b3240c66813994ae6_JaffaCakes118.dll
Size

5.0MB
MD5

f375b7c1c976f31b3240c66813994ae6
SHA1

d0f2c40644d44614c4e8491ab20ae658f554690f
SHA256

0fad304d3f2651eb3978f2ee99cb9d2de3b34696780b0d5f0991eca03ef81725
SHA512

4b245cb9fdbc0e4fab885aaf5715d090eef805b5dd8d5daca48f9eb4e9262527d76c82af2289f9a680be477f2dbacefac3e55c33a3337839e86768918664cc3f
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQjG/D8kI1LJMfcH9PO6Lvp9d:znAQqMSPbcBVQej/yxJM0H9nF

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3363) 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
4588	mssecsvc.exe
2100	mssecsvc.exe
404	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 3432 wrote to memory of 3104	3432	rundll32.exe	82
PID 3432 wrote to memory of 3104	3432	rundll32.exe	82
PID 3432 wrote to memory of 3104	3432	rundll32.exe	82
PID 3104 wrote to memory of 4588	3104	rundll32.exe	83
PID 3104 wrote to memory of 4588	3104	rundll32.exe	83
PID 3104 wrote to memory of 4588	3104	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f375b7c1c976f31b3240c66813994ae6_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3432
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f375b7c1c976f31b3240c66813994ae6_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3104
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4588
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:404

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:2100

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
f9b167ef2037b103fc8fbc2aaf49c500

SHA1
2981d9b3d2bf53e7503a103c7d61c5dce32a0194

SHA256
580bc13cb46b11268b6b2f7f6ab7c002e6a69d6ae0ffce76434d512f1f27ca6a

SHA512
851484dd2fb92d593869960750e6f3767253dc63d9f13fdf0df6c18de528072b0d990af5913d8f5f5d3b36223c488578d168b6bf432d71422c01bd9205fa0bbb

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fcc4371e7acec0a9b3e6ac7b9debeade

SHA1
05a9fb71fd5fd6144c697ca7a6e523d9330b3b4c

SHA256
6cc40596d53333325fe7ce2bb415718035a1cf4eb819e762d79ed3297d51cd53

SHA512
deb3fd026cb0ec187c517382d341c3cf1dae4cbefb7d8766053ad64a140dadc0149bf87ba751f6e4b5d23ee308ebaeb2ec0e29c8071b252d70076c6fa69d7224

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