blustealer | 6d4991fcf138200aacef788de1bdef481b0bef6200652e64348285614c2d7f20

General

Target

SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe
Size

800KB
MD5

502485879e64bb095637b7b28aa9f753
SHA1

bff34f5e2392eef629ecac1f13d31aa2313b040f
SHA256

6d4991fcf138200aacef788de1bdef481b0bef6200652e64348285614c2d7f20
SHA512

da861d6a3d429d5553041ebd52633f878d2d7c56c6382d0fa6f179cf6033237bac681a5391056fef6817b3c106728c956c8802e9171dee158782e190463c0d89
SSDEEP

24576:bGrcoegscYmGBZTFtt0h92KWKe0Sh+Dxa9j:IcnuYmGnTFtt0qHT95

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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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 4800 set thread context of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 3708 set thread context of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe
4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 3728	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	85
PID 4800 wrote to memory of 3728	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	85
PID 4800 wrote to memory of 3728	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	85
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 4800 wrote to memory of 3708	4800	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	86
PID 3708 wrote to memory of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87
PID 3708 wrote to memory of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87
PID 3708 wrote to memory of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87
PID 3708 wrote to memory of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87
PID 3708 wrote to memory of 392	3708	SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe"
  2⤵
  PID:3728
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.PWSX-gen.23016.13533.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3708
- - 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:392

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/392-147-0x0000000001100000-0x0000000001166000-memory.dmp

Filesize
408KB

Download
memory/3708-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3708-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3708-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4800-132-0x0000000000520000-0x00000000005E8000-memory.dmp

Filesize
800KB

Download
memory/4800-137-0x0000000007C50000-0x0000000007CEC000-memory.dmp

Filesize
624KB

Download
memory/4800-136-0x0000000005130000-0x000000000513A000-memory.dmp

Filesize
40KB

Download
memory/4800-135-0x0000000005A50000-0x0000000005BF6000-memory.dmp

Filesize
1.6MB

Download
memory/4800-134-0x0000000004F90000-0x0000000005022000-memory.dmp

Filesize
584KB

Download
memory/4800-133-0x00000000054A0000-0x0000000005A44000-memory.dmp

Filesize
5.6MB

Download

Analysis

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