blustealer | 1a4d18bc01f4c5857b32c7ae2ffe7ec90ff5d4e4bf312f8048bb85706f5fbff5

Analysis

max time kernel
143s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
17-11-2022 16:58

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General

Target

RFQ# 6000163267.exe
Size

910KB
MD5

f13711fcb52a6025e97a2bf85d9d4643
SHA1

e662ca8610953c0c7e90a161162d3e1b03e29442
SHA256

1a4d18bc01f4c5857b32c7ae2ffe7ec90ff5d4e4bf312f8048bb85706f5fbff5
SHA512

6e1885bdae20ea8c28d95c10701d9390f44d57fa01593a63ca72c9a2124b7069e30b1875cfb795956e2f78bbe6c88a636f4aa208c865991eb762f898443d70d7
SSDEEP

24576:gy/5dJbw9j6QSpvsRecLAzAd/AHjZnbCkI:P/5k9GQSpCecLCKMjZnbCkI

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

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-1-5-21-929662420-1054238289-2961194603-1000\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 4848 set thread context of 4380	4848	RFQ# 6000163267.exe	89
PID 4380 set thread context of 1904	4380	RFQ# 6000163267.exe	90

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4380	RFQ# 6000163267.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4848 wrote to memory of 4380	4848	RFQ# 6000163267.exe	89
PID 4380 wrote to memory of 1904	4380	RFQ# 6000163267.exe	90
PID 4380 wrote to memory of 1904	4380	RFQ# 6000163267.exe	90
PID 4380 wrote to memory of 1904	4380	RFQ# 6000163267.exe	90
PID 4380 wrote to memory of 1904	4380	RFQ# 6000163267.exe	90
PID 4380 wrote to memory of 1904	4380	RFQ# 6000163267.exe	90

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\RFQ# 6000163267.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ# 6000163267.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Users\Admin\AppData\Local\Temp\RFQ# 6000163267.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ# 6000163267.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4380
- - 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:1904

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/1904-145-0x0000000001300000-0x0000000001366000-memory.dmp

Filesize
408KB

Download
memory/4380-138-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4380-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4380-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4848-132-0x0000000000B50000-0x0000000000C3A000-memory.dmp

Filesize
936KB

Download
memory/4848-133-0x0000000005C50000-0x00000000061F4000-memory.dmp

Filesize
5.6MB

Download
memory/4848-134-0x00000000055D0000-0x0000000005662000-memory.dmp

Filesize
584KB

Download
memory/4848-135-0x0000000005670000-0x000000000567A000-memory.dmp

Filesize
40KB

Download
memory/4848-136-0x00000000080A0000-0x000000000813C000-memory.dmp

Filesize
624KB

Download