wannacry | 7a3ed2b72925bb270b6fc6e7e35953dc12e51ec52942460b5b5a1230dd017934

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20-05-2024 04:01

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General

Target

5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll
Size

5.0MB
MD5

5d14531026b8490cbc359238ba824dfa
SHA1

24fdf3e92f949f26cdcc4072874c6270e49ee1e8
SHA256

7a3ed2b72925bb270b6fc6e7e35953dc12e51ec52942460b5b5a1230dd017934
SHA512

017b5a8d8b6c369886589bff17705c283b6c37bbd08a7d818ef4ccff7380e8f953b3b9ce1a6251f295501258b64173c6d113ce180a8d833d4b7d988dd48cc5fe
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQ43R8yAH1plAH:+DqPoBhz1aRxcSUDkz3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3085) 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

2328 mssecsvc.exe
1012 mssecsvc.exe
4416 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
2328	mssecsvc.exe
1012	mssecsvc.exe
4416	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 4644 wrote to memory of 4076	4644	rundll32.exe	rundll32.exe
PID 4644 wrote to memory of 4076	4644	rundll32.exe	rundll32.exe
PID 4644 wrote to memory of 4076	4644	rundll32.exe	rundll32.exe
PID 4076 wrote to memory of 2328	4076	rundll32.exe	mssecsvc.exe
PID 4076 wrote to memory of 2328	4076	rundll32.exe	mssecsvc.exe
PID 4076 wrote to memory of 2328	4076	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4644

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4076

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2328

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4416

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1012

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

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
f15f9a2b69b17fad2d08438c1962dc3f

SHA1
530d70ec9ee74f4d5020c48bed7c5af271a7cea2

SHA256
7b2a82db208fb9721779b5d73b0910400367a97877ea03dc59fe04c6eb76ecde

SHA512
1c2f4d1511bf80d660fb5902e2f5f42fd82b5ccf1214f1ba83b7ec1aec15e1afcfc3ab9e3935f82c3c146cf24cdefa63c308a4f59cbd24bf58b5d42679be38c8

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
23b2a05fb0e2bc41386fe290248ab538

SHA1
0c73894417c4fed3ba1288f24b52fca954d256bf

SHA256
b9d207f4c8502a8dfd1cc4b3114639d24eecb955baba2bf4340af2a506b86310

SHA512
c2be1057ccf59567e1b4fc6d4b207ea396f93c8e9d8d5ced29a1097f18892c6551972f34f984eabad1506c51f9eac08203b7717b1fd77d613e6122e04b0a51e4

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