wannacry | ed4239728df8dc6d90612bcfcf41dc40e4b633f8be4d668657ae39340f920b0a

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
18-05-2024 12:46

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General

Target

54c56d0ef889f68d72504783d10294e7_JaffaCakes118.dll
Size

5.0MB
MD5

54c56d0ef889f68d72504783d10294e7
SHA1

b425969a10d4c87cc5ee4fc13f7f1195955d5aa6
SHA256

ed4239728df8dc6d90612bcfcf41dc40e4b633f8be4d668657ae39340f920b0a
SHA512

f803493cf5c672acc2f05bd7bf72a578dee74a3c34415c2c770a63f7b6cfeb0a89b49b1d3a6e9fef52e56ca08c6b325e4493be38e63aff396a0bbba73b991118
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9wlZMgWZBcrGIH:d8qPe1Cxcxk3ZAEUaWWDcr3H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3330) 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

1740 mssecsvc.exe
2968 mssecsvc.exe
2620 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
1740	mssecsvc.exe
2968	mssecsvc.exe
2620	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 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1656 wrote to memory of 1956	1656	rundll32.exe	rundll32.exe
PID 1956 wrote to memory of 1740	1956	rundll32.exe	mssecsvc.exe
PID 1956 wrote to memory of 1740	1956	rundll32.exe	mssecsvc.exe
PID 1956 wrote to memory of 1740	1956	rundll32.exe	mssecsvc.exe
PID 1956 wrote to memory of 1740	1956	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\54c56d0ef889f68d72504783d10294e7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1656

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\54c56d0ef889f68d72504783d10294e7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1956

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1740

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2620

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:2968

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
02aebba06116263626b1f626bf33dff4

SHA1
ab8cbc5216005a30c6a64dc58f51464f9583284e

SHA256
999e9890225311df9d19413fde15a42c379b47f2300f75b8dea06e2c0ab77902

SHA512
17c9cb46f89216b7856688dcd4efcdeb13b50f66d47ce05ca88521a9301b14d4648703529388fd8894e15cedc4a7fb84c19bf5b45686db589cdc179b1ebb174d

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
0a8efd54f829757467cadc2b5a83fa73

SHA1
fc4490d4e554ed5edce7c7f9a7e7f9419e9a9be6

SHA256
6fb1859461314056a999048d5a5f95b1c0f1c511625e6b2dd3996d8836208b40

SHA512
bcc8ce611c9172976dd9b38f4f16659713e87f1308aca6f53a597d06ada64ccf23c4ab107a816a145b07dc438af2b9e8f7733b9b88c2ae38800f12a7cbae06b4

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