blustealer | 324f9aa85a477ba47d4dc4e8516be8d8600eec6de72b44ee671efae46b5c965e

General

Target

INQUIRY.exe
Size

1.0MB
MD5

008d403f9c3256f249844b772e69df0b
SHA1

585052adf379c88d8dda6d702171d555107aee24
SHA256

324f9aa85a477ba47d4dc4e8516be8d8600eec6de72b44ee671efae46b5c965e
SHA512

296d3f8600c4431751f226dbfe861e30f169c446e4916fc5e7c7fe42ee279b6af88a4f7581220896fc78c711adb88c109c8aa4ba03085afae060fc14716f37b6
SSDEEP

24576:aUlRuROyqGUL8N77c72qU+osnvDLhi3NgULc29hh3Y5RpjlAwX:aUlRuRNqGo8NvW2qUyvfQ3NbPodew

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5797428905:AAGaRRXGZN1d9GGFd3sE5x4uSpCGF0PU4m4/sendMessage?chat_id=1251788325

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\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
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4792 set thread context of 4680	4792	INQUIRY.exe	86
PID 4680 set thread context of 3592	4680	INQUIRY.exe	87

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4792	INQUIRY.exe
4792	INQUIRY.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4792	INQUIRY.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4680	INQUIRY.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4792 wrote to memory of 4680	4792	INQUIRY.exe	86
PID 4680 wrote to memory of 3592	4680	INQUIRY.exe	87
PID 4680 wrote to memory of 3592	4680	INQUIRY.exe	87
PID 4680 wrote to memory of 3592	4680	INQUIRY.exe	87
PID 4680 wrote to memory of 3592	4680	INQUIRY.exe	87
PID 4680 wrote to memory of 3592	4680	INQUIRY.exe	87

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\INQUIRY.exe
"C:\Users\Admin\AppData\Local\Temp\INQUIRY.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Users\Admin\AppData\Local\Temp\INQUIRY.exe
  "C:\Users\Admin\AppData\Local\Temp\INQUIRY.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:3592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3592-148-0x0000000002450000-0x0000000002460000-memory.dmp

Filesize
64KB

Download
memory/3592-147-0x0000000000510000-0x0000000000576000-memory.dmp

Filesize
408KB

Download
memory/4680-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

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

Filesize
440KB

Download
memory/4680-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4680-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4792-136-0x0000000004F50000-0x0000000004F5A000-memory.dmp

Filesize
40KB

Download
memory/4792-139-0x0000000007F80000-0x000000000801C000-memory.dmp

Filesize
624KB

Download
memory/4792-138-0x0000000004E40000-0x0000000004E50000-memory.dmp

Filesize
64KB

Download
memory/4792-137-0x0000000004E40000-0x0000000004E50000-memory.dmp

Filesize
64KB

Download
memory/4792-133-0x00000000003D0000-0x00000000004E0000-memory.dmp

Filesize
1.1MB

Download
memory/4792-135-0x0000000004E80000-0x0000000004F12000-memory.dmp

Filesize
584KB

Download
memory/4792-134-0x00000000054F0000-0x0000000005A94000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing