blustealer | dba189ded0db555ce536385f81ad1490d1123534ec89b72acf4f8be65c001eda

General

Target

RFQ# 437179.exe
Size

945KB
MD5

b6aeee41b0198e03a004fb0d77d9019d
SHA1

6e0a24b8c8b909a7729d90c62af505ccc310f970
SHA256

dba189ded0db555ce536385f81ad1490d1123534ec89b72acf4f8be65c001eda
SHA512

9e30546d30dfb1d924acbfa3400be101281937c42ca6e8ef3d2c48a40aadefa36ff08a0ec570441419a502e04baa7ed3d561d257acebdfa947dfb8dd647f1ea2
SSDEEP

24576:PyqTC/fI4T3MirauGdpcoL2XoLKmlNMbn/KSDTKR7f:PXMvraSoLNLblNMDhq

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\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
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2804 set thread context of 4620	2804	RFQ# 437179.exe	91
PID 4620 set thread context of 4176	4620	RFQ# 437179.exe	92

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2804	RFQ# 437179.exe
2804	RFQ# 437179.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2804	RFQ# 437179.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4620	RFQ# 437179.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 4516	2804	RFQ# 437179.exe	90
PID 2804 wrote to memory of 4516	2804	RFQ# 437179.exe	90
PID 2804 wrote to memory of 4516	2804	RFQ# 437179.exe	90
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 2804 wrote to memory of 4620	2804	RFQ# 437179.exe	91
PID 4620 wrote to memory of 4176	4620	RFQ# 437179.exe	92
PID 4620 wrote to memory of 4176	4620	RFQ# 437179.exe	92
PID 4620 wrote to memory of 4176	4620	RFQ# 437179.exe	92
PID 4620 wrote to memory of 4176	4620	RFQ# 437179.exe	92
PID 4620 wrote to memory of 4176	4620	RFQ# 437179.exe	92

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\RFQ# 437179.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ# 437179.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Local\Temp\RFQ# 437179.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ# 437179.exe"
  2⤵
  PID:4516
- C:\Users\Admin\AppData\Local\Temp\RFQ# 437179.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ# 437179.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4620
- - 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:4176

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/2804-133-0x0000000000EB0000-0x0000000000FA2000-memory.dmp

Filesize
968KB

Download
memory/2804-134-0x0000000005E20000-0x00000000063C4000-memory.dmp

Filesize
5.6MB

Download
memory/2804-135-0x0000000005870000-0x0000000005902000-memory.dmp

Filesize
584KB

Download
memory/2804-136-0x00000000059F0000-0x0000000005A00000-memory.dmp

Filesize
64KB

Download
memory/2804-137-0x00000000057F0000-0x00000000057FA000-memory.dmp

Filesize
40KB

Download
memory/2804-138-0x00000000059F0000-0x0000000005A00000-memory.dmp

Filesize
64KB

Download
memory/2804-139-0x0000000007360000-0x00000000073FC000-memory.dmp

Filesize
624KB

Download
memory/4176-147-0x0000000000F90000-0x0000000000FF6000-memory.dmp

Filesize
408KB

Download
memory/4620-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4620-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4620-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4620-152-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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