blustealer | a99ad6c50cd5ec1409151d618216ea2616d10d8e3959f8f3067b257b172efa4b

General

Target

order request.exe
Size

907KB
MD5

d684ffec7438d50b76869761acf3672a
SHA1

8f10196462c460575b7907198b0efccaa57fe184
SHA256

a99ad6c50cd5ec1409151d618216ea2616d10d8e3959f8f3067b257b172efa4b
SHA512

ff57b43d0e5b975264314ba4885ae0749f5c1438fba27865fbc27659ccda115905d58dad4e51934d423c0890f032b61907f34cc410212b75fa71fc219dbc1469
SSDEEP

24576:4/5UXyIiQEM+8+b8f1rQR+FjdTy9KUE6EEUXjZnbCkI:4/5myoo4f1rQIBdxUzUXjZnbCkI

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\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3496 set thread context of 4568	3496	order request.exe	92
PID 4568 set thread context of 4200	4568	order request.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	48	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3496	order request.exe
3496	order request.exe
3496	order request.exe
3496	order request.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3496	order request.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4568	order request.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 1256	3496	order request.exe	90
PID 3496 wrote to memory of 1256	3496	order request.exe	90
PID 3496 wrote to memory of 1256	3496	order request.exe	90
PID 3496 wrote to memory of 2024	3496	order request.exe	91
PID 3496 wrote to memory of 2024	3496	order request.exe	91
PID 3496 wrote to memory of 2024	3496	order request.exe	91
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 3496 wrote to memory of 4568	3496	order request.exe	92
PID 4568 wrote to memory of 4200	4568	order request.exe	93
PID 4568 wrote to memory of 4200	4568	order request.exe	93
PID 4568 wrote to memory of 4200	4568	order request.exe	93
PID 4568 wrote to memory of 4200	4568	order request.exe	93
PID 4568 wrote to memory of 4200	4568	order request.exe	93

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\order request.exe
"C:\Users\Admin\AppData\Local\Temp\order request.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3496
- C:\Users\Admin\AppData\Local\Temp\order request.exe
  "C:\Users\Admin\AppData\Local\Temp\order request.exe"
  2⤵
  PID:1256
- C:\Users\Admin\AppData\Local\Temp\order request.exe
  "C:\Users\Admin\AppData\Local\Temp\order request.exe"
  2⤵
  PID:2024
- C:\Users\Admin\AppData\Local\Temp\order request.exe
  "C:\Users\Admin\AppData\Local\Temp\order request.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4568
- - 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:4200

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/3496-135-0x0000000005790000-0x000000000579A000-memory.dmp

Filesize
40KB

Download
memory/3496-132-0x0000000000D10000-0x0000000000DFA000-memory.dmp

Filesize
936KB

Download
memory/3496-136-0x0000000008230000-0x00000000082CC000-memory.dmp

Filesize
624KB

Download
memory/3496-134-0x00000000057B0000-0x0000000005842000-memory.dmp

Filesize
584KB

Download
memory/3496-133-0x0000000005D60000-0x0000000006304000-memory.dmp

Filesize
5.6MB

Download
memory/4200-147-0x0000000000F00000-0x0000000000F66000-memory.dmp

Filesize
408KB

Download
memory/4568-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4568-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4568-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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