blustealer | fd482fa2269db98e32ec1a0ecb21f132083e07dfdccf4baa9ec8d305c63eae23

Analysis

max time kernel
146s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
05-05-2023 15:57

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General

Target

technical spec_pdf.exe
Size

964KB
MD5

d5a045e300184028b6a6dfc75a303307
SHA1

5fc5a4a17bc5ad2e7ee4da563d5a348c618c0cf9
SHA256

fd482fa2269db98e32ec1a0ecb21f132083e07dfdccf4baa9ec8d305c63eae23
SHA512

0fb4fe0cc538995303669b8a3bb1576c0c462caee47ff2c8c2545ea760c21a4f9a36be8600295f9ea98034afc313cc63de2940b21013a04ad2d29070b539dae1
SSDEEP

24576:5MaB1dLvo9yPmx0k6F9FkjefS/cIXVaUys/FvV:5pB1Zw9yPk6fFkjCihllFv

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-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1616 set thread context of 4392	1616	technical spec_pdf.exe	90
PID 4392 set thread context of 3332	4392	technical spec_pdf.exe	91

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

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4392	technical spec_pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 1616 wrote to memory of 4392	1616	technical spec_pdf.exe	90
PID 4392 wrote to memory of 3332	4392	technical spec_pdf.exe	91
PID 4392 wrote to memory of 3332	4392	technical spec_pdf.exe	91
PID 4392 wrote to memory of 3332	4392	technical spec_pdf.exe	91
PID 4392 wrote to memory of 3332	4392	technical spec_pdf.exe	91
PID 4392 wrote to memory of 3332	4392	technical spec_pdf.exe	91

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\technical spec_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\technical spec_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Users\Admin\AppData\Local\Temp\technical spec_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\technical spec_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4392
- - 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:3332

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

Replay Monitor

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Downloads

memory/1616-133-0x00000000003E0000-0x00000000004D8000-memory.dmp

Filesize
992KB

Download
memory/1616-134-0x0000000005330000-0x00000000058D4000-memory.dmp

Filesize
5.6MB

Download
memory/1616-135-0x0000000004D80000-0x0000000004E12000-memory.dmp

Filesize
584KB

Download
memory/1616-136-0x0000000004F20000-0x0000000004F30000-memory.dmp

Filesize
64KB

Download
memory/1616-137-0x0000000004D30000-0x0000000004D3A000-memory.dmp

Filesize
40KB

Download
memory/1616-138-0x0000000004F20000-0x0000000004F30000-memory.dmp

Filesize
64KB

Download
memory/1616-139-0x0000000006B50000-0x0000000006BEC000-memory.dmp

Filesize
624KB

Download
memory/3332-147-0x0000000000500000-0x0000000000566000-memory.dmp

Filesize
408KB

Download
memory/4392-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4392-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4392-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4392-158-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download