wannacry | a641d724dec27e78a2af50a943f1da6e75dcb6949590a246183d889aa8d2c7b9

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08-05-2024 17:41

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General

Target

25fa333121c25d65f611f5c2ce1fc140_JaffaCakes118.dll
Size

5.0MB
MD5

25fa333121c25d65f611f5c2ce1fc140
SHA1

d424d450274385c3a52bb075e50e78cf28fd357e
SHA256

a641d724dec27e78a2af50a943f1da6e75dcb6949590a246183d889aa8d2c7b9
SHA512

923b13f60a1aee8139b1442f7ae2b9cfcea545808346a79ed107adbf017b37054ced404aa241385142688372f137d819ea5d45dd068675a4a589ad6dfd2d85b1
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P59:d8qPe1Cxcxk3ZAEUad

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3246) 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

2608 mssecsvc.exe
2976 mssecsvc.exe
2660 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
2608	mssecsvc.exe
2976	mssecsvc.exe
2660	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:

rundll32.exemssecsvc.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 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\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2848 wrote to memory of 2852	2848	rundll32.exe	rundll32.exe
PID 2852 wrote to memory of 2608	2852	rundll32.exe	mssecsvc.exe
PID 2852 wrote to memory of 2608	2852	rundll32.exe	mssecsvc.exe
PID 2852 wrote to memory of 2608	2852	rundll32.exe	mssecsvc.exe
PID 2852 wrote to memory of 2608	2852	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\25fa333121c25d65f611f5c2ce1fc140_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2848

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\25fa333121c25d65f611f5c2ce1fc140_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2852

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2608

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2660

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:2976

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
f590db1e4d349d111ce766152b281b15

SHA1
1329eec616e18440b1368387e6d713054deb0ad5

SHA256
40b1e53710a288ce96d594717b478bf5c5f73dd8fd6462f1d93ef0862bd63ef7

SHA512
250c7c390fee5c06eb8e2989f44df45582643fc46c68ad6c4108783a134b83780361c645194a56ebe254b3ab39537597476c4add566c4090c6ea26587c68e06d

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
e6261ba4378452a35591144b492e4997

SHA1
67b339c993e9a3aaf998b6f1f5456053700bcd5e

SHA256
6a7f6729db488c2040611485dbc9597b0d4473fef9e82d5f7fae7afb82983767

SHA512
6d90342d690e564c155133be2ef819edb36635c802092cd99a62a784e33967a06e169394bc338ec66466e3658b63050d0d3a9fe9949836d430357bd392c783c4

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