blustealer | 7042b9a81eaf1ddd3de522f40e80a915e0e44c6843320013daaa8ee2a842a9e2

General

Target

Purchase Order.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-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4084 set thread context of 4868	4084	Purchase Order.exe	93
PID 4868 set thread context of 2244	4868	Purchase Order.exe	94

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4084	Purchase Order.exe
4084	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4084	Purchase Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4868	Purchase Order.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4084 wrote to memory of 4696	4084	Purchase Order.exe	92
PID 4084 wrote to memory of 4696	4084	Purchase Order.exe	92
PID 4084 wrote to memory of 4696	4084	Purchase Order.exe	92
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4084 wrote to memory of 4868	4084	Purchase Order.exe	93
PID 4868 wrote to memory of 2244	4868	Purchase Order.exe	94
PID 4868 wrote to memory of 2244	4868	Purchase Order.exe	94
PID 4868 wrote to memory of 2244	4868	Purchase Order.exe	94
PID 4868 wrote to memory of 2244	4868	Purchase Order.exe	94
PID 4868 wrote to memory of 2244	4868	Purchase Order.exe	94

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\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4084
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  PID:4696
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4868
- - 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:2244

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/2244-147-0x00000000004D0000-0x0000000000536000-memory.dmp

Filesize
408KB

Download
memory/4084-133-0x0000000000DD0000-0x0000000000EAC000-memory.dmp

Filesize
880KB

Download
memory/4084-134-0x0000000005E50000-0x00000000063F4000-memory.dmp

Filesize
5.6MB

Download
memory/4084-135-0x00000000058A0000-0x0000000005932000-memory.dmp

Filesize
584KB

Download
memory/4084-136-0x0000000005880000-0x0000000005890000-memory.dmp

Filesize
64KB

Download
memory/4084-137-0x0000000005860000-0x000000000586A000-memory.dmp

Filesize
40KB

Download
memory/4084-138-0x0000000005880000-0x0000000005890000-memory.dmp

Filesize
64KB

Download
memory/4084-139-0x0000000007220000-0x00000000072BC000-memory.dmp

Filesize
624KB

Download
memory/4868-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4868-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4868-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4868-149-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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