blustealer | 781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
25/10/2022, 12:35

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General

Target
Details & Invoices.exe
Size 1.1MB
Sample221025-psbndscgan
SHA256 781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c
MD5 6518419b9de76da716fb64120d84efb2
SHA1 36c349c1d03b67c799d8b96bc76d9fea40f25e1f
SHA512 4da469d1051e44453c1575c76178dbff421a47e48694a35d1b15179307121333ffc45b5ec79a98eb70c3a7479224df9edf0eff50d0f2264c8c6f31df6b47b620
SSDEEP 24576:D1o9IkBL4tXTL5g7tFUBde4x9jBbke0fFkd7:D2IDLKBWO899bke0qd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot5450700540:AAEJyEEV8BKgYUKmnCPZxp19kD9GVSRup5M/sendMessage?chat_id=5422342474

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2820 set thread context of 4340	2820	Details & Invoices.exe	89
PID 4340 set thread context of 4640	4340	Details & Invoices.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	40	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4340	Details & Invoices.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 2820 wrote to memory of 4340	2820	Details & Invoices.exe	89
PID 4340 wrote to memory of 4640	4340	Details & Invoices.exe	90
PID 4340 wrote to memory of 4640	4340	Details & Invoices.exe	90
PID 4340 wrote to memory of 4640	4340	Details & Invoices.exe	90
PID 4340 wrote to memory of 4640	4340	Details & Invoices.exe	90
PID 4340 wrote to memory of 4640	4340	Details & Invoices.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Details & Invoices.exe
"C:\Users\Admin\AppData\Local\Temp\Details & Invoices.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Users\Admin\AppData\Local\Temp\Details & Invoices.exe
  "C:\Users\Admin\AppData\Local\Temp\Details & Invoices.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4340
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    3⤵
    - Accesses Microsoft Outlook profiles
    - outlook_office_path
    - outlook_win_path
    PID:4640

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/2820-132-0x0000000000260000-0x000000000037E000-memory.dmp

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memory/2820-133-0x0000000005360000-0x0000000005904000-memory.dmp

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memory/2820-134-0x0000000004CF0000-0x0000000004D82000-memory.dmp

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memory/2820-135-0x0000000004EB0000-0x0000000004EBA000-memory.dmp

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memory/2820-136-0x0000000008600000-0x000000000869C000-memory.dmp

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memory/2820-137-0x000000000B2E0000-0x000000000B346000-memory.dmp

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memory/4340-139-0x0000000000400000-0x000000000046E000-memory.dmp

Download

memory/4340-141-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4340-144-0x0000000000400000-0x000000000046E000-memory.dmp

Download

memory/4640-146-0x0000000001200000-0x0000000001266000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads