wannacry | ae65ff5a612f13d7755bca2ff5dfd5e0161a85eb893c4285b7b4b3f02c97d005

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-09-2024 12:35

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General

Target

de4e13b6b78a818f7a2f8085094565b8_JaffaCakes118.dll
Size

5.0MB
MD5

de4e13b6b78a818f7a2f8085094565b8
SHA1

79fbb145ad91ef777f4bdb7d3d31b22d469e05bb
SHA256

ae65ff5a612f13d7755bca2ff5dfd5e0161a85eb893c4285b7b4b3f02c97d005
SHA512

84a08e07f36d6dd38ce87c8568f52a22219b602e8ad809443783cc181a3cc2bc6c9a33f68f95b4450caf71de4b9d69224d5d3e6b4147fff480972d62d76802c2
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9wp2H:d8qPe1Cxcxk3ZAEUaq4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3291) 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
2064	mssecsvc.exe
836	mssecsvc.exe
2268	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2412 wrote to memory of 2104	2412	rundll32.exe	29
PID 2104 wrote to memory of 2064	2104	rundll32.exe	30
PID 2104 wrote to memory of 2064	2104	rundll32.exe	30
PID 2104 wrote to memory of 2064	2104	rundll32.exe	30
PID 2104 wrote to memory of 2064	2104	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\de4e13b6b78a818f7a2f8085094565b8_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\de4e13b6b78a818f7a2f8085094565b8_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2104
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2064
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2268

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:836

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
b31578070de02e95c744960a5a2b6a98

SHA1
a925c186074bc575f7fc5c52cdacc532055a035b

SHA256
1997f83c7dc0688a7727cab29bd3bea92b5b9d3549b9dfda55fd1e66289cef0e

SHA512
3cda83fb023870d269d92fc124d6d9f0363f1a4f01273b53baee346ced31871dce06aac8a280ca3feb0ef47ee841837dcdeb47c45c0831bc6c5245c3b2eb9c13

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
115c1735c25b8af994675a1ad8d8150f

SHA1
89932dab91715928bba3c62f14a614a425a9ab36

SHA256
95b05236f98781f650dfc7819649a4629f1a6e4a81a00ed0e63d6e1edd779c88

SHA512
6b9c0c859c4c579cc21baf01ebdb5ec48371becce809b172e405023f47a7cca33fe3257220c5c95ac7f934f92fc789efc0ea3668e5d7f45c514775cb6fca3bc9

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