wannacry | 5215530ee738198b8d29b1a6d8499cb9fa1c25c93745e439656d9daccf75429f

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 12:48

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General

Target

c307527207c6d89eb61b40d07d536058_JaffaCakes118.dll
Size

5.0MB
MD5

c307527207c6d89eb61b40d07d536058
SHA1

534aea4a2d00bd149758898903077e3c03692f5f
SHA256

5215530ee738198b8d29b1a6d8499cb9fa1c25c93745e439656d9daccf75429f
SHA512

591bafde69f3f7362e0b88a7ac86097da2c71bace9c1e1e3b75959edca60b47bb02b0b6fd8fd060416455ab290f8ff44bc667bd94536b414847df405e5f435c7
SSDEEP

98304:+DQR1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DQR1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3239) 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
2900	mssecsvc.exe
3488	mssecsvc.exe
1428	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 3704 wrote to memory of 1664	3704	rundll32.exe	84
PID 3704 wrote to memory of 1664	3704	rundll32.exe	84
PID 3704 wrote to memory of 1664	3704	rundll32.exe	84
PID 1664 wrote to memory of 2900	1664	rundll32.exe	86
PID 1664 wrote to memory of 2900	1664	rundll32.exe	86
PID 1664 wrote to memory of 2900	1664	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c307527207c6d89eb61b40d07d536058_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3704
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c307527207c6d89eb61b40d07d536058_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1664
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2900
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1428

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:3488

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
bf3042f3f4d1892ede6eb0feb8caaeba

SHA1
fc0ae506466eca76a00cceb8d3d6765bfaceebc3

SHA256
1f8d51583e99eec06c6b251127657d8d67a93c6640ab1f828c95fc68c10634e8

SHA512
494d8e3b713050183fc9a5b19b49e387748bc6b9df110c4732e2ae5f6eed495c5eff17bf7273a51d4bafa69bea57d180955bb35c1a6233eed2a5ad7d133df813

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
4a4cfd73e372d5543950fcc3a10bd53c

SHA1
4fb19e77fb28bbc04160390a9534a7f4d97c240d

SHA256
1d56b830453bbbe0e87c74999ae991f68ff6880b656fab7d1879017de5c17748

SHA512
f0b2e02f8eb5a01873623b3824b88348d15a6274d45a9ad0e5a159bdb78c5b3d5bde5cf0cc2c21825393425b49bdc6c0f099998ceff72ac5d3c766df0615ef45

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