blustealer | d18530899d9bdaf56500f6db6c64e34313d4d9997ea7a4530c0b131efe002dbb

General

Target

RFQ#00092022.exe
Size

1.4MB
MD5

42f4a19dc81367621d2a28f4da0f746e
SHA1

18aea8f955e12adafeae521bf2aca33c400d8820
SHA256

363eadd86b68060f7b436c585757a0356bbf6dc000d125612e9cd42cb3819b72
SHA512

dd9da22085484537fa1d2a5b3467a6b2935cc51cd5ff5719799476f494b106485a039df427a653de05486084c354b7c0e7d6519330131b439692db5b8fa267b3
SSDEEP

24576:YiFulLrYjqEz7YdaCkCCI0S2ll1subE7qxo3i:YisIjqEz7vfS2CRqe3

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 2232 set thread context of 2508	2232	RFQ#00092022.exe	92
PID 2508 set thread context of 1224	2508	RFQ#00092022.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	35	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2232	RFQ#00092022.exe
2232	RFQ#00092022.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	RFQ#00092022.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2232	RFQ#00092022.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2232	RFQ#00092022.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2508	RFQ#00092022.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 1264	2232	RFQ#00092022.exe	91
PID 2232 wrote to memory of 1264	2232	RFQ#00092022.exe	91
PID 2232 wrote to memory of 1264	2232	RFQ#00092022.exe	91
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2232 wrote to memory of 2508	2232	RFQ#00092022.exe	92
PID 2508 wrote to memory of 1224	2508	RFQ#00092022.exe	93
PID 2508 wrote to memory of 1224	2508	RFQ#00092022.exe	93
PID 2508 wrote to memory of 1224	2508	RFQ#00092022.exe	93
PID 2508 wrote to memory of 1224	2508	RFQ#00092022.exe	93
PID 2508 wrote to memory of 1224	2508	RFQ#00092022.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\RFQ#00092022.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ#00092022.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\RFQ#00092022.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ#00092022.exe"
  2⤵
  PID:1264
- C:\Users\Admin\AppData\Local\Temp\RFQ#00092022.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ#00092022.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2508
- - 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:1224

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/1224-148-0x0000000000760000-0x00000000007C6000-memory.dmp

Filesize
408KB

Download
memory/2232-135-0x00000000057E0000-0x00000000057EA000-memory.dmp

Filesize
40KB

Download
memory/2232-136-0x0000000009470000-0x000000000950C000-memory.dmp

Filesize
624KB

Download
memory/2232-137-0x00000000099B0000-0x0000000009A16000-memory.dmp

Filesize
408KB

Download
memory/2232-132-0x0000000000CD0000-0x0000000000E34000-memory.dmp

Filesize
1.4MB

Download
memory/2232-134-0x0000000005810000-0x00000000058A2000-memory.dmp

Filesize
584KB

Download
memory/2232-133-0x0000000005CE0000-0x0000000006284000-memory.dmp

Filesize
5.6MB

Download
memory/2508-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2508-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2508-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2508-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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