blustealer | 3c4bb89b988346aaae821e6b5ca65572da9e265bf00dfa5d0df0870634711545

General

Target

RFQ-06062023.exe
Size

994KB
MD5

9c8ebe5eb36367cf02012d0664b97202
SHA1

e1fdfe7d35e0241eb17e501dce0586f37bef4ac7
SHA256

3c4bb89b988346aaae821e6b5ca65572da9e265bf00dfa5d0df0870634711545
SHA512

2ab235608c6e5d97dcd995a4700b99ba863a47674fe34d4981d469a32ad99d085fdaa72a0eed068f8cce79049ec1f24f93d16de0eb068b7a845c6866d482cf0a
SSDEEP

24576:E/thewlqB6pq4ptiyuo0urd0XAa23zgS4mU3yUt7T6O+uw+:se2q8pFpt91yf6U3D7TX+

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-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\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 1484 set thread context of 4436	1484	RFQ-06062023.exe	91
PID 4436 set thread context of 4556	4436	RFQ-06062023.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	50	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1484	RFQ-06062023.exe
1484	RFQ-06062023.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1484	RFQ-06062023.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4436	RFQ-06062023.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 1484 wrote to memory of 4436	1484	RFQ-06062023.exe	91
PID 4436 wrote to memory of 4556	4436	RFQ-06062023.exe	92
PID 4436 wrote to memory of 4556	4436	RFQ-06062023.exe	92
PID 4436 wrote to memory of 4556	4436	RFQ-06062023.exe	92
PID 4436 wrote to memory of 4556	4436	RFQ-06062023.exe	92
PID 4436 wrote to memory of 4556	4436	RFQ-06062023.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\RFQ-06062023.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-06062023.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Users\Admin\AppData\Local\Temp\RFQ-06062023.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ-06062023.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4436
- - 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:4556

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

Loading Replay Monitor...

Downloads

memory/1484-139-0x0000000008B90000-0x0000000008C2C000-memory.dmp

Filesize
624KB

Download
memory/1484-134-0x0000000005E40000-0x00000000063E4000-memory.dmp

Filesize
5.6MB

Download
memory/1484-135-0x0000000005790000-0x0000000005822000-memory.dmp

Filesize
584KB

Download
memory/1484-136-0x0000000005A40000-0x0000000005A50000-memory.dmp

Filesize
64KB

Download
memory/1484-137-0x0000000005780000-0x000000000578A000-memory.dmp

Filesize
40KB

Download
memory/1484-138-0x0000000005A40000-0x0000000005A50000-memory.dmp

Filesize
64KB

Download
memory/1484-133-0x0000000000D00000-0x0000000000DFE000-memory.dmp

Filesize
1016KB

Download
memory/4436-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4436-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4436-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4436-150-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4556-147-0x0000000000D60000-0x0000000000DC6000-memory.dmp

Filesize
408KB

Download
memory/4556-148-0x0000000005580000-0x0000000005590000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing