blustealer | 42263e557ad50b22270aa78bc80360442bbb0475d12983e2bf760da7c3f6a3f6

General

Target

Technical specification.exe
Size

1.2MB
MD5

31a29680b013c3d2928ada03074d0152
SHA1

25f08eaca9a1ba6b07f169d4a8095b1306d6342a
SHA256

42263e557ad50b22270aa78bc80360442bbb0475d12983e2bf760da7c3f6a3f6
SHA512

bb79319aa3b0191458d246fa83d4b84a65786cbfe14c2ab399dd22fd9aec65d680eaed2b0d24d44a0e419e79a5fb9a831fe282ec3aef7f17e2a4b6c72cb0f0fd
SSDEEP

24576:C74ve4hlhZ9JsMengztif/3uF5xOYZYaz0m:C4bvhiati33KTY20m

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-1-5-21-2891029575-1462575-1165213807-1000\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 2392 set thread context of 864	2392	Technical specification.exe	91
PID 864 set thread context of 3084	864	Technical specification.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 behavior: EnumeratesProcesses 2 IoCs

pid	Process
2392	Technical specification.exe
2392	Technical specification.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	Technical specification.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
864	Technical specification.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 1788	2392	Technical specification.exe	90
PID 2392 wrote to memory of 1788	2392	Technical specification.exe	90
PID 2392 wrote to memory of 1788	2392	Technical specification.exe	90
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 2392 wrote to memory of 864	2392	Technical specification.exe	91
PID 864 wrote to memory of 3084	864	Technical specification.exe	92
PID 864 wrote to memory of 3084	864	Technical specification.exe	92
PID 864 wrote to memory of 3084	864	Technical specification.exe	92
PID 864 wrote to memory of 3084	864	Technical specification.exe	92
PID 864 wrote to memory of 3084	864	Technical specification.exe	92

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\Technical specification.exe
"C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Users\Admin\AppData\Local\Temp\Technical specification.exe
  "C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
  2⤵
  PID:1788
- C:\Users\Admin\AppData\Local\Temp\Technical specification.exe
  "C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:864
- - 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:3084

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/864-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/864-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/864-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/864-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2392-132-0x0000000000EC0000-0x0000000000FF2000-memory.dmp

Filesize
1.2MB

Download
memory/2392-137-0x0000000009BB0000-0x0000000009C16000-memory.dmp

Filesize
408KB

Download
memory/2392-136-0x0000000009AF0000-0x0000000009B8C000-memory.dmp

Filesize
624KB

Download
memory/2392-135-0x0000000005960000-0x000000000596A000-memory.dmp

Filesize
40KB

Download
memory/2392-134-0x00000000059A0000-0x0000000005A32000-memory.dmp

Filesize
584KB

Download
memory/2392-133-0x0000000005F50000-0x00000000064F4000-memory.dmp

Filesize
5.6MB

Download
memory/3084-148-0x0000000000530000-0x0000000000596000-memory.dmp

Filesize
408KB

Download

Analysis

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