blustealer | 06b3e35f665e7a38fd7439681983e2123a0ffc72effeaabad3e41a0c190cd255

Analysis

max time kernel
144s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2023, 09:15

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General

Target

Quotation_pdf.exe
Size

910KB
MD5

6be7360d15864b39760f38be37d21b32
SHA1

9a85a30228996405f11807cbbf8d9cd7e47d45cc
SHA256

0f71aedb95163de525fa395b1a444f48222bc28b70521bff45467cbf98b63b9a
SHA512

b98ad8f32c4632c403466e27161518c991b6c9395da27a743bc3af6ca2a7c632b595ce44fd7d09c6603212cdab9dcb220db76f80399719f7097451a8190f2a0e
SSDEEP

24576:S0PXkGzgCC4mEIXxiZiX6vjgxxUtqY6VUOP:DPng74mJxmiX6vjgEb2

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-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2072 set thread context of 4680	2072	Quotation_pdf.exe	88
PID 4680 set thread context of 4704	4680	Quotation_pdf.exe	89

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	27	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4680	Quotation_pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 2072 wrote to memory of 4680	2072	Quotation_pdf.exe	88
PID 4680 wrote to memory of 4704	4680	Quotation_pdf.exe	89
PID 4680 wrote to memory of 4704	4680	Quotation_pdf.exe	89
PID 4680 wrote to memory of 4704	4680	Quotation_pdf.exe	89
PID 4680 wrote to memory of 4704	4680	Quotation_pdf.exe	89
PID 4680 wrote to memory of 4704	4680	Quotation_pdf.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4680
- - 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:4704

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/2072-139-0x0000000005490000-0x00000000054A0000-memory.dmp

Filesize
64KB

Download
memory/2072-134-0x0000000005BF0000-0x0000000006194000-memory.dmp

Filesize
5.6MB

Download
memory/2072-135-0x0000000005720000-0x00000000057B2000-memory.dmp

Filesize
584KB

Download
memory/2072-136-0x0000000005490000-0x00000000054A0000-memory.dmp

Filesize
64KB

Download
memory/2072-137-0x0000000005490000-0x00000000054A0000-memory.dmp

Filesize
64KB

Download
memory/2072-138-0x0000000005490000-0x00000000054A0000-memory.dmp

Filesize
64KB

Download
memory/2072-133-0x0000000000AC0000-0x0000000000BAA000-memory.dmp

Filesize
936KB

Download
memory/2072-140-0x00000000095D0000-0x000000000966C000-memory.dmp

Filesize
624KB

Download
memory/4680-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4680-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4680-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4680-159-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4704-148-0x0000000000540000-0x00000000005A6000-memory.dmp

Filesize
408KB

Download