wannacry | dd8fd179929723fc686a7e53f36572cb11e1743b52384a6fe02a4768e383892f

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
19-09-2024 12:46

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General

Target

eb5cfaec3e10350749c9d2064c09a65c_JaffaCakes118.dll
Size

5.0MB
MD5

eb5cfaec3e10350749c9d2064c09a65c
SHA1

e13b2463a99748fe34f02aa1bfbaaee73a6a09a5
SHA256

dd8fd179929723fc686a7e53f36572cb11e1743b52384a6fe02a4768e383892f
SHA512

8e13793da28c7b316b99238312fe7f347ef7c536376110c72279ff71e989979f13a5e51dc9689113a4b1ba989df0e514b90cbfe8a485944de982f7e9ed983bf2
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8y:+DqPe1Cxcxk3ZAEUadzR8y

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

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

pid	Process
3240	mssecsvc.exe
1048	mssecsvc.exe
1864	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 4672 wrote to memory of 3372	4672	rundll32.exe	82
PID 4672 wrote to memory of 3372	4672	rundll32.exe	82
PID 4672 wrote to memory of 3372	4672	rundll32.exe	82
PID 3372 wrote to memory of 3240	3372	rundll32.exe	83
PID 3372 wrote to memory of 3240	3372	rundll32.exe	83
PID 3372 wrote to memory of 3240	3372	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb5cfaec3e10350749c9d2064c09a65c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb5cfaec3e10350749c9d2064c09a65c_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3372
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3240
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1864

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:1048

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
2ea856120a0106ce16b78144a74d3399

SHA1
658815f14862629524389bf8132412ae1b388579

SHA256
9aaea64d0597d7d7065f0727f48616c91c0190c2f26fc6b0a390d1638897923c

SHA512
a634f8d3af0945b61f7fc66c7df4e84ec763910d5f9d2277b72bbaf83100ca35e78ac6a43640d9589e3bd7d3cb9bfa301a422491a212456a9effc55e4637b354

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
af61bc24c3ef9bff7e018fd61bf11439

SHA1
a0342f37bbaaf0411fa5689fe8f3dba5905e5247

SHA256
a7d0e297456fb4511858bac104b9bc9ea85e73609a375c3289b5cd98c702adbc

SHA512
14b157e512bb3462109c32c449d5a401b1142d81c21a96c9e685a7926c1a0b6a912f271d1518ebea402e085d210b61e5e30f8e2d885dfc60a2fe2a2938b72bcc

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