f296f08aa0ad60e857270505d931392943d95cf7a2ecb2e0245ff785c157ca49

Analysis

max time kernel
143s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
04-09-2023 09:01

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General

Target

CrustaceanInstaller.exe
Size

3.4MB
MD5

bd3a90f3b268ac71630666bc7ce92406
SHA1

cb6327b43c8209c1d30517b5be9a394bf73ec739
SHA256

f296f08aa0ad60e857270505d931392943d95cf7a2ecb2e0245ff785c157ca49
SHA512

11cc492ae8647376329965e610125aa956fe575d5bd3d3bedc9822f765b5ecf672b8ffa99685a004960b3ce7998670c6c67457660f352d42331750d0a20cf62e
SSDEEP

49152:SSrSrtUT0/n2mmNu+d8dVKFpHY/o1pPcFxHLC5j9ljJrS9bbroKJeq0Tl:BNukXiFxbKl

Score

6^/10

Malware Config

Signatures

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4164	3704	WerFault.exe	83

Modifies registry class 7 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\ = "Installer"	CrustaceanInstaller.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\URL Protocol	CrustaceanInstaller.exe
Key created	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\shell\open\command	CrustaceanInstaller.exe
Key created	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\shell	CrustaceanInstaller.exe
Key created	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\shell\open	CrustaceanInstaller.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean\shell\open\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CrustaceanInstaller.exe \"%1\""	CrustaceanInstaller.exe
Key created	\REGISTRY\USER\S-1-5-21-4078585466-1563564224-3678410669-1000_Classes\crustacean	CrustaceanInstaller.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3704	CrustaceanInstaller.exe

C:\Users\Admin\AppData\Local\Temp\CrustaceanInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\CrustaceanInstaller.exe"
1⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
PID:3704
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 3704 -s 1348
  2⤵
  - Program crash
  PID:4164

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 444 -p 3704 -ip 3704
1⤵
PID:4704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3704-0-0x00007FF7C58D0000-0x00007FF7C5C34000-memory.dmp

Filesize
3.4MB

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