wannacry | 3d0383c4f3c46f9ff9b0db3a526426d8fabbbd7ec2c473e6d4a6d859c3e612f2

Analysis

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

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05-05-2024 10:03

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General

Target

172742bfe2982aa15c60569e5b217e75_JaffaCakes118.dll
Size

5.0MB
MD5

172742bfe2982aa15c60569e5b217e75
SHA1

d2a6feb2d79cedb9bf26ed1b72317fd716a3fa43
SHA256

3d0383c4f3c46f9ff9b0db3a526426d8fabbbd7ec2c473e6d4a6d859c3e612f2
SHA512

d4bf8c37e3db498459359e67fb84e72883e06d8a925e6a0fef7a7b44f3cc12b172fda9253f38061b1cb5c9b108929811b0426d0a6297a6cec48cdfdd1ea6d7c5
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAw2:d8qPe1Cxcxk3ZAEUadzR8y

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3329) 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

2984 mssecsvc.exe
2564 mssecsvc.exe
2500 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
2984	mssecsvc.exe
2564	mssecsvc.exe
2500	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:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2872	2852	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2984	2872	rundll32.exe	mssecsvc.exe
PID 2872 wrote to memory of 2984	2872	rundll32.exe	mssecsvc.exe
PID 2872 wrote to memory of 2984	2872	rundll32.exe	mssecsvc.exe
PID 2872 wrote to memory of 2984	2872	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\172742bfe2982aa15c60569e5b217e75_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2852

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\172742bfe2982aa15c60569e5b217e75_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2872

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2984

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2500

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:2564

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
5da581b5248ef51f23e378474f430028

SHA1
15b2470540efa1d8e18e6a324b46c6c969703b79

SHA256
993e95a63073362991f1532c7cada7a0f35d647dd795dc44a0dd54bcc6c5cb06

SHA512
5f58a5451d75829b2ea890ce0ba2fd3869ced4c42fdfa592e0b9a7e627c622a45e200dcee4d2e24e27de3f9c3e0a19ddbf7d8d9d6cd0f7254d3a670c84a44f46

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
90938407c8be94d5c44223a758a76a76

SHA1
35a1d87f9b7806bb48076e9d06ebda7d8f3af3c2

SHA256
c14b363c8649574b0d23cea2c64c29cfabfb3bfe60f16728eb18ea622bde8706

SHA512
18604214eecabb998d4f40915dca5d38f86abe63a73c40b20fef4d6f6420dae1c056da00330773ad99baafc88a306da88770bb263f4958e3e13e06e6bacc18d4

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