blustealer | a47f1b1a2995865a081e270569e3cb0857d3af3759c2e06b72e3f418e9611a87

General

Target

RFQ 10050395.exe
Size

733KB
MD5

208b8885063f4562e1e181c63f155bd1
SHA1

b0071008c3ae769433c6c71acd49c80a4b5a853d
SHA256

a47f1b1a2995865a081e270569e3cb0857d3af3759c2e06b72e3f418e9611a87
SHA512

96f48b489308904e883c004514cc0cd33cfeb893f03e4f9d9454b88c95c991cad2b9773040c4a9d08d524d0f79cf7232e4cc81352ea0a0100c4c7dbf99c5e3f7

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5330579892:AAHDIOXrD-d-pMU_JI4pPczBI962-9fokRs/sendMessage?chat_id=1494890429

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

AppLaunch.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

RFQ 10050395.exeRFQ 10050395.exe

description	pid	process	target process
PID 392 set thread context of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 4368 set thread context of 4596	4368	RFQ 10050395.exe	AppLaunch.exe

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.

Processes:

description flow ioc

HTTP User-Agent header 31 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ 10050395.exe

pid process

4368 RFQ 10050395.exe

description	flow	ioc
HTTP User-Agent header	31	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
4368	RFQ 10050395.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

RFQ 10050395.exeRFQ 10050395.exe

description	pid	process	target process
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 392 wrote to memory of 4368	392	RFQ 10050395.exe	RFQ 10050395.exe
PID 4368 wrote to memory of 4596	4368	RFQ 10050395.exe	AppLaunch.exe
PID 4368 wrote to memory of 4596	4368	RFQ 10050395.exe	AppLaunch.exe
PID 4368 wrote to memory of 4596	4368	RFQ 10050395.exe	AppLaunch.exe
PID 4368 wrote to memory of 4596	4368	RFQ 10050395.exe	AppLaunch.exe
PID 4368 wrote to memory of 4596	4368	RFQ 10050395.exe	AppLaunch.exe

outlook_office_path 1 IoCs

Processes:

AppLaunch.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

Processes:

AppLaunch.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\RFQ 10050395.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 10050395.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:392

C:\Users\Admin\AppData\Local\Temp\RFQ 10050395.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 10050395.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4368

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:4596

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/392-130-0x00000000000E0000-0x000000000019C000-memory.dmp

Filesize
752KB

Download
memory/392-131-0x0000000005140000-0x00000000056E4000-memory.dmp

Filesize
5.6MB

Download
memory/392-132-0x0000000004B90000-0x0000000004C22000-memory.dmp

Filesize
584KB

Download
memory/392-133-0x0000000004B30000-0x0000000004B3A000-memory.dmp

Filesize
40KB

Download
memory/392-134-0x0000000008460000-0x00000000084FC000-memory.dmp

Filesize
624KB

Download
memory/4368-135-0x0000000000000000-mapping.dmp

Download
memory/4368-136-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4368-138-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4368-141-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4368-144-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4596-142-0x0000000000000000-mapping.dmp

Download
memory/4596-143-0x0000000000D60000-0x0000000000DC6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads