wannacry | ef81a0b0ec5572f1094c8a64e02d552d3a1cd1cf68ed41743d4f6d16aedb539c

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
15-06-2024 00:02

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General

Target

ac23310d6d7ec72dc84de280e09f3a22_JaffaCakes118.dll
Size

5.0MB
MD5

ac23310d6d7ec72dc84de280e09f3a22
SHA1

22cce1bbd3d23979de07d2d4b894eecb666536cf
SHA256

ef81a0b0ec5572f1094c8a64e02d552d3a1cd1cf68ed41743d4f6d16aedb539c
SHA512

f2aa64320ea083b4bfb260f282dd19c9d5e050381043a8e3e94544b70b0266b5787777ed7b6ed5e503b5719c057f792744ddcc1b5d2b18d3e5df60c1f2b6ae16
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQ56LLuYAMEcpcL7nEaut/8uN:znAQqMSPbcBVQe1AMEcaEau3

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2684) 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

1500 mssecsvc.exe
3224 mssecsvc.exe
3324 tasksche.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

pid	process
1500	mssecsvc.exe
3224	mssecsvc.exe
3324	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\UNCAsIntranet = "1"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3920 wrote to memory of 348	3920	rundll32.exe	rundll32.exe
PID 3920 wrote to memory of 348	3920	rundll32.exe	rundll32.exe
PID 3920 wrote to memory of 348	3920	rundll32.exe	rundll32.exe
PID 348 wrote to memory of 1500	348	rundll32.exe	mssecsvc.exe
PID 348 wrote to memory of 1500	348	rundll32.exe	mssecsvc.exe
PID 348 wrote to memory of 1500	348	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac23310d6d7ec72dc84de280e09f3a22_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3920

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ac23310d6d7ec72dc84de280e09f3a22_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:348

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1500

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3324

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3224

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
2bb2b6e91bb173eb2b2b9c5853d7a555

SHA1
19a092b2606d18052fca01357ef887bec8c5cfa9

SHA256
639da161f3af3013153a5ed74788c23126b6ee4e13ccf64f0c046f2f5817856c

SHA512
55335cbbdef874b56fe5791c5d8638264239a0ce2bb6d19dec2998bcaa76e0f145424d81d5171581c704f0026a68244d15d2d9d352f32e9613dc416ebc0e5fae

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
cfa00c14186099176e1aeae3c4d8492d

SHA1
5cbdf2a6057d0508705a1d0a1ffd356516f5ae1b

SHA256
c2dd07e89d92b8c57c37fdce051391823063650a7b30e8d398035b227d3ef951

SHA512
15fd60705b6673570d063bd84995f23cee9f4183b94d59cd7a2043294177f0d0dfd4fff10666a1bb735120d32d806e8d301c937386b36ed21bc3a0e1bf398848

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