wannacry | 0935255e0bd813c450e7e034cbdc4e5f4d8f9bc0d4c2c97fe1e9c62536e00e1f

Analysis

max time kernel
150s
max time network
153s
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 11:34

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General

Target

c6c4356675da0276bd14910a6232ff73_JaffaCakes118.dll
Size

5.0MB
MD5

c6c4356675da0276bd14910a6232ff73
SHA1

8e1c2bfcd5f2f53c8a1f3e1031bf0033a66ba7f6
SHA256

0935255e0bd813c450e7e034cbdc4e5f4d8f9bc0d4c2c97fe1e9c62536e00e1f
SHA512

98fe76174482053561ec164b4f950baa90eedf513d318032f98a9382626592b99221dd48c9f8f6c2384035835d8bba4d064c1f73766ea115195fb8b3668f0097
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593i2H:+DqPe1Cxcxk3ZAEUadzhH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3211) 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
3628	mssecsvc.exe
1380	mssecsvc.exe
4804	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 3972 wrote to memory of 4444	3972	rundll32.exe	84
PID 3972 wrote to memory of 4444	3972	rundll32.exe	84
PID 3972 wrote to memory of 4444	3972	rundll32.exe	84
PID 4444 wrote to memory of 3628	4444	rundll32.exe	85
PID 4444 wrote to memory of 3628	4444	rundll32.exe	85
PID 4444 wrote to memory of 3628	4444	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6c4356675da0276bd14910a6232ff73_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c6c4356675da0276bd14910a6232ff73_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4444
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3628
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4804

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:1380

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
2b358b4107cc3196ea1e228f38e7ef07

SHA1
a80bd777ea38817cc60fdb1cba09df673b7f9d15

SHA256
d3f3ce7ba036db054346270178cf68584fb79c40c57faee11aaf148198a1ff02

SHA512
db7271918e3fb54eb22c9c8bf5ce0871bee1eac5d365c5210d584ca5238f411649d0b50c076909a20b4403fbeed778a086fae9a8baeb0feaee1e91cf096e9840

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a6d87a8688540c3d3252a9af1dbafaed

SHA1
626587de95caa0b9a507a73bb24bb3b60d85adb7

SHA256
8ce09962f82fbc4782655aa71d995e025c3bae3ea71f35f208363678a12a5fae

SHA512
8d8fabf9dab9b3d4a51d312b3ff46bf3a4242394b4a79781f663aa3114bd3904a678fb80deb000addc7fa5899d994f24cf7d1fae4a56e8ca72530127aeadec24

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