wannacry | 7e1df58e6f7f3f3fd062815a0a4e77e96f9d537846a81d7a29e6e5481fc3b13e

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
30-05-2024 05:07

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General

Target

831e8a827985b4e3eb991495cbedb297_JaffaCakes118.dll
Size

5.0MB
MD5

831e8a827985b4e3eb991495cbedb297
SHA1

634ff381e971e3a6793f08eea39cfdeedee9b3de
SHA256

7e1df58e6f7f3f3fd062815a0a4e77e96f9d537846a81d7a29e6e5481fc3b13e
SHA512

cb28fd78474622c6f971bdb3e823e2f63881056ee5c6b5a990dd611953fdf3ed8d151ca359096b2dce2269190458574c97257e8476b0a6fccb010487a4177e91
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P5wk2H:d8qPe1Cxcxk3ZAEUadKH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3037) 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

3044 mssecsvc.exe
2580 mssecsvc.exe
2740 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
3044	mssecsvc.exe
2580	mssecsvc.exe
2740	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 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2660	2196	rundll32.exe	rundll32.exe
PID 2660 wrote to memory of 3044	2660	rundll32.exe	mssecsvc.exe
PID 2660 wrote to memory of 3044	2660	rundll32.exe	mssecsvc.exe
PID 2660 wrote to memory of 3044	2660	rundll32.exe	mssecsvc.exe
PID 2660 wrote to memory of 3044	2660	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\831e8a827985b4e3eb991495cbedb297_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2196

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\831e8a827985b4e3eb991495cbedb297_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2660

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3044

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2740

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:2580

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

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
ba663508bd1193d3b3fb2ce1ee47cc08

SHA1
9010efe55f18acee34e542e425980c609168efec

SHA256
b6fe5482ec4e435cf17d4d75df349aa5c940758578db947bbfaa87e9d181bbf8

SHA512
795ece04d98012cd345cf3cf576ca1126bb62db40973b4288a0c2818f73465f6f47043a1cab389105b1d9d049a609a13dda48e286cd445c0a29a0511dd003f52

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
1e0a94ada52111f6e7be8e2500ccfc38

SHA1
7553af1252cc2b76c77a573052be13afae77a169

SHA256
6fd793a20636b1c8fbbb2da3d4482028ac4dd6d7dbc91aa4f8e2717d4b83a85f

SHA512
0e752410b0af3c7ef8e6a11f1b96176c3c672618a3c07bcce7d4e466b7fa6a729d40d112ac7801267dc3230a82ec5dd5f36a0ad6547defed7f249ed65b0585d6

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