wannacry | 50528112e0f28a1adc1fe9dd6807db610ff140e3bb2704a7df000f423cb620d6

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-09-2024 20:28

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General

Target

d50c9346c265f81358e2dbdce763617a_JaffaCakes118.dll
Size

5.0MB
MD5

d50c9346c265f81358e2dbdce763617a
SHA1

25b5e61f896b37cf5d9ca56df78ee760e9c57a49
SHA256

50528112e0f28a1adc1fe9dd6807db610ff140e3bb2704a7df000f423cb620d6
SHA512

3a24c4d2c7fefce62f0eecdd376288b8799d3c585d3f372ac337aa4fa13dae0e426159dbe998b0caca8a94b0c4cbe2c428f3b59c43ab1d25cdab08528d1fd1de
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0UX6SASk+Kdq/:SnAQqMSPbcBV46SAA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3106) 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
3976	mssecsvc.exe
1744	mssecsvc.exe
2792	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
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 5052 wrote to memory of 4296	5052	rundll32.exe	83
PID 5052 wrote to memory of 4296	5052	rundll32.exe	83
PID 5052 wrote to memory of 4296	5052	rundll32.exe	83
PID 4296 wrote to memory of 3976	4296	rundll32.exe	85
PID 4296 wrote to memory of 3976	4296	rundll32.exe	85
PID 4296 wrote to memory of 3976	4296	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d50c9346c265f81358e2dbdce763617a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d50c9346c265f81358e2dbdce763617a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4296
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3976
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2792

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:1744

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
281785957971227851a775b7fabf32d3

SHA1
5b73621e6f4cd2848ca17d57c43e610b59496374

SHA256
e4f112ef0ddd8d82c110f4dd904ea17ede6f21b507c966683fa32de362353a53

SHA512
f1d096ad38b4468d350649b5ba22eb1f642b1787ce2ed4bac9fe943eadf2b06a93e98eb94e17b533410be83c93d61559926edfdd6f6cf4b902cd5ec54e8225a0

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1d6fc7853b5b529ec7bd592edbb0b8d2

SHA1
53c4bb1be9cff30a1c8face761d885e2b8b2319d

SHA256
e1da4d2d9668d6811d584c148934241215d8704b901ce19d4cbcd83c22d5ba29

SHA512
69deb3ee3fe2e2075e5ec0282ce770da180bab6ccb5992cdc898bdead88bb229b9e8dad8c3d0c42cbbd2e2ab9150a0a0f8ef3dad4efae086aa0d5a147f6f9835

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