wannacry | 0d47f7bfb29d2a17bcaf8614e8c9d7a7b03500527602d926f5d597011e193b50

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
15-06-2024 17:50

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General

Target

afa43a534b89186dcb549654b3c9a887_JaffaCakes118.dll
Size

5.0MB
MD5

afa43a534b89186dcb549654b3c9a887
SHA1

50a3b4c33a165548a9a6921a5c984ceb26ad27ea
SHA256

0d47f7bfb29d2a17bcaf8614e8c9d7a7b03500527602d926f5d597011e193b50
SHA512

ae7066464795e6b0a51d08ed65a7252e3be1d9fd1034f5a4ba7c0726125f55c4dd8f40abe04f8829f668475790477daceca92a5b9f0734c4e208cccfdbe851a4
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SA9xWa9P593R8yAVp2H:d8qPe1Cxcxk3ZA2adzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3186) 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

2352 mssecsvc.exe
2372 mssecsvc.exe
2600 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
2352	mssecsvc.exe
2372	mssecsvc.exe
2600	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:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 1704	2220	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 2352	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2352	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2352	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2352	1704	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\afa43a534b89186dcb549654b3c9a887_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\afa43a534b89186dcb549654b3c9a887_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1704

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2352

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2600

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:2372

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
6b10f50ccc007f921a3f42530fd3cb4e

SHA1
203af92090f7733972359f7e3f8f8b55e4147e45

SHA256
83994580a212d2139b46757c28e0a737ed5305b88436a8517553fe7a34fd16dc

SHA512
f6abc4f93376c7bdc5b81463fafad7f8677d73594de477a8bc66f81578169da534ce8c061c615d7db738d49001dccbfea654fe4d7b939a889d82acb178a667a8

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
adc305e297b2b29180bca2f99ccfddb0

SHA1
68ff5df984561086735398218ea023d21ba4ba6c

SHA256
3e05a7ef86fb918d6af3e26d1abc4b24f223f9b41d82da8f210b5ea259031ed7

SHA512
32a2a80b2431774ae6074bbf83798c33e936844ba6bc1a98b7148536a476222d816cc6fd94bd1b296834b443630884bd8e6fdbaa5d68ea1ece2857efeabe9f4f

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