wannacry | 1479403f79219664e473e62798db5b4982c11559ea5ef29e1a19ad5897d8114a

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
31-08-2024 20:01

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General

Target

cd816833054ab03c1a734132fddcc839_JaffaCakes118.dll
Size

5.0MB
MD5

cd816833054ab03c1a734132fddcc839
SHA1

271cb6038bcd53dbaf519800e723db4965165e00
SHA256

1479403f79219664e473e62798db5b4982c11559ea5ef29e1a19ad5897d8114a
SHA512

25612044c0667e9e2080721a0667c54724e69c7361eeeae786c65588e1b97f75b96d5585e0e09cf97eb51f17dcd0b7d9e7a23ca6b1356b3c1c0572b26733fc91
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX5pAbvxJM0H9PAME:TDqPoBhz1aRxcSULpAjxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3271) 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
4744	mssecsvc.exe
2344	mssecsvc.exe
4912	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	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 3120 wrote to memory of 3500	3120	rundll32.exe	84
PID 3120 wrote to memory of 3500	3120	rundll32.exe	84
PID 3120 wrote to memory of 3500	3120	rundll32.exe	84
PID 3500 wrote to memory of 4744	3500	rundll32.exe	85
PID 3500 wrote to memory of 4744	3500	rundll32.exe	85
PID 3500 wrote to memory of 4744	3500	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd816833054ab03c1a734132fddcc839_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3120
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cd816833054ab03c1a734132fddcc839_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3500
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4744
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4912

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:2344

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
4e401a75708b725dce8d47d819efc0ec

SHA1
a93017dede81dca6ebc5b69962b096d823ec4d84

SHA256
5ca9bc43e885803a3c1d862f35b666a937b6cac52cae64943fe1ec9f3b403441

SHA512
c06c4d331da4c99748054e90d2db885dd3465f0814f426b272775d2a43a03eeacd7b0cc5bf56a7d3ae22c14b03aacbd58bbad529dd03942cd2fea20f38032dcb

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
20f2dd03840edbc132f7c47358ca28da

SHA1
0514bf6420f4749f0f73e3a1c7c2cc3d188f8bc5

SHA256
e53f652409fcef7f3eb3f8a8a1866b6861fa4eb6461e3b09b0ca16977f5f847e

SHA512
388b68073c29588dde55270a825f08c005c322afd57ad1100d21a969112237bc6880bea91b9846723caa107b9827c92e81c59a46b356e54045d519b0568b233e

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