blustealer | 36c9af5b5712f266baac8963ca365fa3d3b40f8ef1cbfdd4784612d4685d3cc5

Analysis

max time kernel
149s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
13-10-2022 13:02

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General

Target

Specification.exe
Size

1.4MB
MD5

75c4f755670d62947bf2dabb7857165c
SHA1

a86c8680456b8e12ea0e6f5c29622191064b9c6a
SHA256

36c9af5b5712f266baac8963ca365fa3d3b40f8ef1cbfdd4784612d4685d3cc5
SHA512

3f8dbedfb5f29810ef9be65f479afecd18c8d62d5a930dd099f3224425adc29b6f601a88ea3d6f3f81ec37b72788495665a2c6375378da688d33fb44a4160022
SSDEEP

24576:44oTw9wQsp66R9MFPALm68hFYQdAIzQkkZbL0NOzfiUMmdB:l9KpDRsAiTDZcZAefiUMm

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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 804 set thread context of 4968	804	Specification.exe	91
PID 4968 set thread context of 3904	4968	Specification.exe	92

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4968	Specification.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 804 wrote to memory of 4968	804	Specification.exe	91
PID 4968 wrote to memory of 3904	4968	Specification.exe	92
PID 4968 wrote to memory of 3904	4968	Specification.exe	92
PID 4968 wrote to memory of 3904	4968	Specification.exe	92
PID 4968 wrote to memory of 3904	4968	Specification.exe	92
PID 4968 wrote to memory of 3904	4968	Specification.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Specification.exe
"C:\Users\Admin\AppData\Local\Temp\Specification.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:804
- C:\Users\Admin\AppData\Local\Temp\Specification.exe
  "C:\Users\Admin\AppData\Local\Temp\Specification.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4968
- - 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:3904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/804-132-0x0000000000730000-0x000000000089C000-memory.dmp

Filesize
1.4MB

Download
memory/804-133-0x00000000057C0000-0x0000000005D64000-memory.dmp

Filesize
5.6MB

Download
memory/804-134-0x00000000052B0000-0x0000000005342000-memory.dmp

Filesize
584KB

Download
memory/804-135-0x0000000005230000-0x000000000523A000-memory.dmp

Filesize
40KB

Download
memory/804-136-0x000000000C760000-0x000000000C7FC000-memory.dmp

Filesize
624KB

Download
memory/804-137-0x000000000C800000-0x000000000C866000-memory.dmp

Filesize
408KB

Download
memory/3904-146-0x0000000000E00000-0x0000000000E66000-memory.dmp

Filesize
408KB

Download
memory/4968-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4968-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4968-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download