blustealer | 3a40ac14fd18095afb3e8ba414be572421b11bd60d2873132fc704398a472197

General

Target

RFQ 21032023.exe
Size

1.0MB
MD5

b5092b7033671f564ffa23d3103946c1
SHA1

b93194a6c0b2f0ffffcca6aa88dd554bde9af8fa
SHA256

a6bd799fc4f4fe152be8b5709d8dc3d75fc39c750c7b46c56d0b84970a32883d
SHA512

5ce4c3c507e2176a905336ef9dfa64c509d01445360f56c2b4963663ef046160015fcee5b2830e4a696f09cb4ff4e7983dcab61c567687dd5561aa25e12c8c27
SSDEEP

24576:Hq1U9BqmycgiH75BCYjBjrZ3UnolejhMrnyxZvzgC+TcB3TuflETG7NZ:Ku9Bqmycr7CUJrRRlahMrzfTU8lIO

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 1788 set thread context of 1472	1788	RFQ 21032023.exe	90
PID 1472 set thread context of 4268	1472	RFQ 21032023.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	39	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1788	RFQ 21032023.exe
1788	RFQ 21032023.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1788	RFQ 21032023.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1472	RFQ 21032023.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1788 wrote to memory of 1472	1788	RFQ 21032023.exe	90
PID 1472 wrote to memory of 4268	1472	RFQ 21032023.exe	91
PID 1472 wrote to memory of 4268	1472	RFQ 21032023.exe	91
PID 1472 wrote to memory of 4268	1472	RFQ 21032023.exe	91
PID 1472 wrote to memory of 4268	1472	RFQ 21032023.exe	91
PID 1472 wrote to memory of 4268	1472	RFQ 21032023.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\RFQ 21032023.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 21032023.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Local\Temp\RFQ 21032023.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 21032023.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1472
- - 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:4268

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

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Downloads

memory/1472-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1472-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1472-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1472-149-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1788-133-0x0000000000180000-0x0000000000292000-memory.dmp

Filesize
1.1MB

Download
memory/1788-134-0x00000000052B0000-0x0000000005854000-memory.dmp

Filesize
5.6MB

Download
memory/1788-135-0x0000000004D00000-0x0000000004D92000-memory.dmp

Filesize
584KB

Download
memory/1788-136-0x0000000004C50000-0x0000000004C60000-memory.dmp

Filesize
64KB

Download
memory/1788-137-0x0000000004C30000-0x0000000004C3A000-memory.dmp

Filesize
40KB

Download
memory/1788-138-0x0000000004C50000-0x0000000004C60000-memory.dmp

Filesize
64KB

Download
memory/1788-139-0x0000000006A00000-0x0000000006A9C000-memory.dmp

Filesize
624KB

Download
memory/4268-147-0x0000000001300000-0x0000000001366000-memory.dmp

Filesize
408KB

Download

Analysis

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