wannacry | 83d820c4d5ec752c466bf49490e3c42de9db44dffd76b7eb869fed7653b6eac1

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27-05-2024 02:38

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General

Target

77a34248cc10e2188124973fcb3952a9_JaffaCakes118.dll
Size

5.0MB
MD5

77a34248cc10e2188124973fcb3952a9
SHA1

3aa9b023954894a0eed23fec6ba33796290cc5b1
SHA256

83d820c4d5ec752c466bf49490e3c42de9db44dffd76b7eb869fed7653b6eac1
SHA512

eab4ee90f11ba4f89479f012afb706646de671b1dcd531b98fabf7f7453fa12cb1cee18111bbe4f018a4681290915d44492751927fa32b09ec8b8b47de53fecb
SSDEEP

98304:T8qPoBhz1aRxcSUDk36SAEdhvxWa9P59Uc/F:T8qPe1Cxcxk3ZAEUadvF

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3168) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2808 mssecsvc.exe
2884 mssecsvc.exe
2728 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

pid	process
2808	mssecsvc.exe
2884	mssecsvc.exe
2728	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

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

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 2136	640	rundll32.exe	rundll32.exe
PID 2136 wrote to memory of 2808	2136	rundll32.exe	mssecsvc.exe
PID 2136 wrote to memory of 2808	2136	rundll32.exe	mssecsvc.exe
PID 2136 wrote to memory of 2808	2136	rundll32.exe	mssecsvc.exe
PID 2136 wrote to memory of 2808	2136	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\77a34248cc10e2188124973fcb3952a9_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:640
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\77a34248cc10e2188124973fcb3952a9_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2808
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2728

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
e42e740a3c6d8c143d38ea8a16e94b63

SHA1
a3b21b288d565fb0cd7c41534980d1cef4a4312e

SHA256
c7dce150cde43791fecaf7cc049259f2fc6742bce9e36933de35ff668cf5fcb3

SHA512
707069430e93fcb14afae16e995d5dc88c8b9037844c4c49a673efabb501c3274868236b4398ad1201b131d77aa44b4aad11ebeb132d1b6cddd816c4c769a244

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
44662faa774ba92d7fa2dc75621fd9e4

SHA1
556f78ecfba051f09eb0cac1254f6168f1e238c2

SHA256
7d60466ffff500a7528cd2b8182a9b28698c7ba72e1e8652f50d41bc135ca52f

SHA512
c45a618824ea11b5b1db272d4bc05281826599b802916c0ac857a027d7217c6c5438a10e4c3203f63fb7c0bfca58ed2e018fb0f3d23aa4fca1a8ca99dd3195a3

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