blustealer | 6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46

General

Target

6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe
Size

1.2MB
MD5

b63bd686cca7a0de40ba595e1c55c3df
SHA1

c8a7b28371decc264b410bf48beded50b8038a4c
SHA256

6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46
SHA512

c6f11a341630e6accfe78736f13286ab674a7095c14074fb1a84c96d5b587e8f79060d80957164760896347fcb85cf7708a9745fe22e9f5b6df86fcd0303752e
SSDEEP

12288:c2iNIJ2uJUpVLOmO3/XAonActMpNgsUF2SEFvxnvXjNWODQLadmpA8SDhY+Cc0XL:c1nppUPA9HlUsvZoKNmOrT0XwJJl

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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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 2920 set thread context of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 4636 set thread context of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 2920 wrote to memory of 4636	2920	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	92
PID 4636 wrote to memory of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93
PID 4636 wrote to memory of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93
PID 4636 wrote to memory of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93
PID 4636 wrote to memory of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93
PID 4636 wrote to memory of 3428	4636	6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe
"C:\Users\Admin\AppData\Local\Temp\6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Users\Admin\AppData\Local\Temp\6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe
  "C:\Users\Admin\AppData\Local\Temp\6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4636
- - 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:3428

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/2920-133-0x0000000005BC0000-0x0000000006164000-memory.dmp

Filesize
5.6MB

Download
memory/2920-134-0x00000000056B0000-0x0000000005742000-memory.dmp

Filesize
584KB

Download
memory/2920-135-0x0000000005660000-0x000000000566A000-memory.dmp

Filesize
40KB

Download
memory/2920-136-0x000000000A640000-0x000000000A6DC000-memory.dmp

Filesize
624KB

Download
memory/2920-137-0x000000000A750000-0x000000000A7B6000-memory.dmp

Filesize
408KB

Download
memory/2920-132-0x0000000000B90000-0x0000000000CC0000-memory.dmp

Filesize
1.2MB

Download
memory/3428-146-0x0000000000F10000-0x0000000000F76000-memory.dmp

Filesize
408KB

Download
memory/4636-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4636-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4636-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4636-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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