wannacry | 7cd6d125eea23cbc42e1a242ad2c91db2e4e79a26266f00f3d7ef88720763ae5

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 19:11

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General

Target

e784d58fef062a471c059c9a07a2e29c_JaffaCakes118.dll
Size

5.0MB
MD5

e784d58fef062a471c059c9a07a2e29c
SHA1

21b57ff4886df68dd401aea1bdce2b423021613c
SHA256

7cd6d125eea23cbc42e1a242ad2c91db2e4e79a26266f00f3d7ef88720763ae5
SHA512

a727d2156ea9c5237e60c91dcd0574e231617c8b4625b492b95cd582bf12a57f93a1f4a66ec75332c022804edf4e37774476c218ed93f6569a360d1f076151ee
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3218) 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
4396	mssecsvc.exe
4380	mssecsvc.exe
4572	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 4120	4648	rundll32.exe	82
PID 4648 wrote to memory of 4120	4648	rundll32.exe	82
PID 4648 wrote to memory of 4120	4648	rundll32.exe	82
PID 4120 wrote to memory of 4396	4120	rundll32.exe	83
PID 4120 wrote to memory of 4396	4120	rundll32.exe	83
PID 4120 wrote to memory of 4396	4120	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e784d58fef062a471c059c9a07a2e29c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e784d58fef062a471c059c9a07a2e29c_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4120
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4396
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4572

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:4380

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
37a61307a8714c3005bf1a3da3980b02

SHA1
95fc105534f605e1249feb92bdcbf276629756a2

SHA256
531fa5a1b26836d491992a48dcbd7a98963578ab19e5af1f3269fbd309052a7f

SHA512
31d0782943bcb96b0b56f508c60ccb24fe086f804ca751b68b2d1124b57b009e23bf3871cf4546c90cda7de941456b696f298e4e221b2bbd777fce40918f500f

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
50f0d6961f4433eaea5fb1df87cb5cff

SHA1
53d176a5f23edfd5ecb70a4a3a22d5c01b019e15

SHA256
a9ea9416d59b36c4648dabbf723e076315a2ea8f0ff7da9f203ad9a4ca91d296

SHA512
33ce76e2d0c84c10410561ddee39e7cd3becae81f2d8d0f1d9b20f2f3b22a8881e994284160320e6ec2e273605375e0794951c2e1712c104f2bb7b5dc94e17e5

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