wannacry | a274d7771f1d7d0ef7133f3a00502267c7d03c48f4a491b075527915dc95c329

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
18-05-2024 21:37

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General

Target

56ebabfe5ac52c06923fa1fd5e76fd49_JaffaCakes118.dll
Size

5.0MB
MD5

56ebabfe5ac52c06923fa1fd5e76fd49
SHA1

307f347723d234984a2f1c152325a12f0d1ec333
SHA256

a274d7771f1d7d0ef7133f3a00502267c7d03c48f4a491b075527915dc95c329
SHA512

212469b9559b1ee55fe026719499e9330737972c9951104c0dd9e74a31d715be2ac7314c07d7e17f143e894bb7b898133bf4a3f9fd851a57bc663ec259bc8008
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQjGL4kqAH1pNZtA0p+9XEk:znAQqMSPbcBVQejLyAH1plAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3336) 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

4648 mssecsvc.exe
4196 mssecsvc.exe
1080 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
4648	mssecsvc.exe
4196	mssecsvc.exe
1080	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
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4872 wrote to memory of 2408	4872	rundll32.exe	rundll32.exe
PID 4872 wrote to memory of 2408	4872	rundll32.exe	rundll32.exe
PID 4872 wrote to memory of 2408	4872	rundll32.exe	rundll32.exe
PID 2408 wrote to memory of 4648	2408	rundll32.exe	mssecsvc.exe
PID 2408 wrote to memory of 4648	2408	rundll32.exe	mssecsvc.exe
PID 2408 wrote to memory of 4648	2408	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\56ebabfe5ac52c06923fa1fd5e76fd49_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4872

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\56ebabfe5ac52c06923fa1fd5e76fd49_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2408

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4648

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1080

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4196

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
8e131c7f6517cbf9d312f9a7c5cebd96

SHA1
eb87deb9b58fc77c3daa219977e351c0f4cabad9

SHA256
0ab2b0b27a99e38f273db3ce1574ee5a8f800c7f14c7873035b3d54fe9054562

SHA512
86ec30f84132b446b00b8f128434bbc0576d1c33c83b33c1e45a559c40867ca8a2a2350a2f64e008985f08dfc266e178a9f0acb3a1f2461ac2fbd68fadc60582

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
5523234d2bf6d8bd47edf8cf1f7a2401

SHA1
00f49a644e2a2a566974920077e0e3eca2a4d047

SHA256
453e9160c63ca49b3fb2f1258d7cd828a1076845ad75ef1639154ca96b5dfbae

SHA512
176595185809f72c66e4b58f67efd43009e543b2da64bf9089fbc085a5e7908c8a1ef371ab69226439fc92fd7c306366d2cdfe5347342d7775e2980388c4bff9

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