blustealer | d85f8012ae2bd3aa07e73fc7967891eec06562d90968a0f8589eac232bc8d014

General

Target

7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe
Size

857KB
MD5

6762bbcbc3e23a6006e8dbe978b8b85d
SHA1

9e60d67c8dc70667d6a04e302fdd9165d55443ab
SHA256

7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2
SHA512

a02cbbe84aa912877332549e0c5715faec099d4c6748d4b22afb032fc219a6ffee4da8aa101d58aa2edb1d82e660a33da55ebc07741e2c7f9c541fe775c6a190
SSDEEP

24576:tJqrxgV31OsCcNrd8vK4mMX+kYrj98O4AqUmhZe:tJqtgt1OPYrd8C4vX2jv/

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-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3776 set thread context of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 4040 set thread context of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe
3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3776 wrote to memory of 4260	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	90
PID 3776 wrote to memory of 4260	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	90
PID 3776 wrote to memory of 4260	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	90
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 3776 wrote to memory of 4040	3776	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	91
PID 4040 wrote to memory of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92
PID 4040 wrote to memory of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92
PID 4040 wrote to memory of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92
PID 4040 wrote to memory of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92
PID 4040 wrote to memory of 4320	4040	7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe
"C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3776
- C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe
  "C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe"
  2⤵
  PID:4260
- C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe
  "C:\Users\Admin\AppData\Local\Temp\7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4040
- - 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:4320

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/3776-133-0x0000000000E00000-0x0000000000EDC000-memory.dmp

Filesize
880KB

Download
memory/3776-134-0x0000000005EA0000-0x0000000006444000-memory.dmp

Filesize
5.6MB

Download
memory/3776-135-0x00000000058F0000-0x0000000005982000-memory.dmp

Filesize
584KB

Download
memory/3776-136-0x0000000003440000-0x0000000003450000-memory.dmp

Filesize
64KB

Download
memory/3776-137-0x0000000003430000-0x000000000343A000-memory.dmp

Filesize
40KB

Download
memory/3776-138-0x0000000003440000-0x0000000003450000-memory.dmp

Filesize
64KB

Download
memory/3776-139-0x0000000008A90000-0x0000000008B2C000-memory.dmp

Filesize
624KB

Download
memory/4040-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4040-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4040-148-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4320-146-0x0000000000D00000-0x0000000000D66000-memory.dmp

Filesize
408KB

Download

Analysis

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