wannacry | 3fd647e0636cdc6559584720480f65a80d7c39f19f5da79fde445f98a0f483f3

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-06-2024 08:26

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General

Target

89df4643198d4fa26bc265704470ad11_JaffaCakes118.dll
Size

5.0MB
MD5

89df4643198d4fa26bc265704470ad11
SHA1

8c14cf6b4ff40cb0404c09a4e6b856af5d7656e7
SHA256

3fd647e0636cdc6559584720480f65a80d7c39f19f5da79fde445f98a0f483f3
SHA512

20e9e9dffd7dcfd4f1918395c066d59bbe7a1f1f184ece336f5e69e9394112efe4ea7b2e4bf7d058cc297fc69121000419493790f7a4fff02fe209e77eb9e699
SSDEEP

98304:+DqPoBhz1aRxcSUMk36SAEdhvxWa9P593R8yAVp2H:+DqPe1Cxcuk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3364) 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
2408 mssecsvc.exe
1484 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 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

pid	process
2808	mssecsvc.exe
2408	mssecsvc.exe
1484	tasksche.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 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1652 wrote to memory of 2072	1652	rundll32.exe	rundll32.exe
PID 1652 wrote to memory of 2072	1652	rundll32.exe	rundll32.exe
PID 1652 wrote to memory of 2072	1652	rundll32.exe	rundll32.exe
PID 2072 wrote to memory of 2808	2072	rundll32.exe	mssecsvc.exe
PID 2072 wrote to memory of 2808	2072	rundll32.exe	mssecsvc.exe
PID 2072 wrote to memory of 2808	2072	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\89df4643198d4fa26bc265704470ad11_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1652

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\89df4643198d4fa26bc265704470ad11_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2072

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:1484

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2408

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
2ae7812eeea8e7d78de19924987e7970

SHA1
1898e5365ad20665d6b37408d6f8b83b94116d18

SHA256
1297c4970cdf137b1e1e75c11d61dd0c61e1406441763e665174fde3b69fb392

SHA512
64db4d6ea68a113d6b3adc236c931b342c8f771bf5ce450142acfd06d2dcb23821163edfa563ac73418313cfd394b9015300689dbde6acba48d85c178e5f608e

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
34a717258b0ecd1174eb6ad3af5881bc

SHA1
d0a985b4279355786233ea0205e19fa40166f03e

SHA256
f53b64116917aaf5eb1e2e5af64511816d618d4a56e199214a66bd988651a73e

SHA512
2b017bb62dfafe0fe60bab03fcc0ca84199e77b947872460d34a351fdc183e817f1d12d491ef6f3188a99ff748d3f846fea00597332b8bd0a11961849b0aa20d

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