wannacry | 31dc3260893218b8f2c0b0dc8005dc19d0ea2445828146398502a7a3ecd13335

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
15-09-2024 11:07

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General

Target

e257c4df597850a5f8ae0d6958058073_JaffaCakes118.dll
Size

5.0MB
MD5

e257c4df597850a5f8ae0d6958058073
SHA1

b882682ae8172635ec290a0b52b6a00e7dab3fdf
SHA256

31dc3260893218b8f2c0b0dc8005dc19d0ea2445828146398502a7a3ecd13335
SHA512

118f9ff9dcf564cee406d0b57d14758765050056cb745fec5a19c79924442c4dbed79dba63b35ae823e06dee9c7f71554616ad39fdf2f740cec10f53c7956662
SSDEEP

98304:+DqPoBQRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqP7xcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3364) 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
3940	mssecsvc.exe
2912	mssecsvc.exe
3448	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 4412	4852	rundll32.exe	83
PID 4852 wrote to memory of 4412	4852	rundll32.exe	83
PID 4852 wrote to memory of 4412	4852	rundll32.exe	83
PID 4412 wrote to memory of 3940	4412	rundll32.exe	85
PID 4412 wrote to memory of 3940	4412	rundll32.exe	85
PID 4412 wrote to memory of 3940	4412	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e257c4df597850a5f8ae0d6958058073_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e257c4df597850a5f8ae0d6958058073_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4412
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3940
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3448

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:2912

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
0c8d6696eb10e1b05fbc19778770a231

SHA1
b0f909a35883753ff75a53802cdd85bb3d25e8c1

SHA256
a091a04020d3663536d37152a1a8610c9cb720a90f481c2e02d913a57ef24c92

SHA512
b38186f7e5adfb674a8b0a024a26f57aa399239ce851d397e354223035e4cb7fe7c519eef36ed75d1e42e12b82203a935a42f5d08da0ffaacb1e630216344c3a

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
05d88bb878550c22e3aaf330e7e07724

SHA1
f826bbe8a19ad1688e56d2ef6debca1eaca8dd4a

SHA256
733da0e6b0c8287759b967437156b8b5693ba581373f031a076df5e97daf60aa

SHA512
567fb9010cb53dc7d0174888b91d0cb651d8ce56b794e006b719d2089961db211a43de41f06205a82da3d1913244d710201fb6a0f1678058c96b6683238221ed

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