blustealer | 11056e183ec9ae4bad6f5c180fc37460d504e13776d7214b2a8b60fad449bfeb

General

Target

781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe
Size

1.1MB
MD5

6518419b9de76da716fb64120d84efb2
SHA1

36c349c1d03b67c799d8b96bc76d9fea40f25e1f
SHA256

781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c
SHA512

4da469d1051e44453c1575c76178dbff421a47e48694a35d1b15179307121333ffc45b5ec79a98eb70c3a7479224df9edf0eff50d0f2264c8c6f31df6b47b620
SSDEEP

24576:D1o9IkBL4tXTL5g7tFUBde4x9jBbke0fFkd7:D2IDLKBWO899bke0qd

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2860 set thread context of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 3092 set thread context of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 2860 wrote to memory of 3092	2860	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	91
PID 3092 wrote to memory of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92
PID 3092 wrote to memory of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92
PID 3092 wrote to memory of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92
PID 3092 wrote to memory of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92
PID 3092 wrote to memory of 2404	3092	781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe
"C:\Users\Admin\AppData\Local\Temp\781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Users\Admin\AppData\Local\Temp\781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe
  "C:\Users\Admin\AppData\Local\Temp\781a83f3ac8bb7d765db4ad32fcd1e07e585c533f300ddc847ea93d420c6d64c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3092
- - 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:2404

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

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Downloads

memory/2404-146-0x0000000001330000-0x0000000001396000-memory.dmp

Filesize
408KB

Download
memory/2860-133-0x0000000005930000-0x0000000005ED4000-memory.dmp

Filesize
5.6MB

Download
memory/2860-134-0x00000000052D0000-0x0000000005362000-memory.dmp

Filesize
584KB

Download
memory/2860-135-0x0000000005380000-0x000000000538A000-memory.dmp

Filesize
40KB

Download
memory/2860-136-0x00000000073F0000-0x000000000748C000-memory.dmp

Filesize
624KB

Download
memory/2860-137-0x000000000B450000-0x000000000B4B6000-memory.dmp

Filesize
408KB

Download
memory/2860-132-0x0000000000950000-0x0000000000A6E000-memory.dmp

Filesize
1.1MB

Download
memory/3092-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3092-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3092-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3092-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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