blustealer | 6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56

Analysis

max time kernel
144s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
14-11-2022 08:44

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General

Target

573b0103956eb1c9f12e2a2adcc77846.exe
Size

852KB
MD5

573b0103956eb1c9f12e2a2adcc77846
SHA1

50e9fd321b9b1f39b6430b01941562ba924e40c0
SHA256

6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56
SHA512

ab26ac29ae7135cd6dcc5e95e6f9af290fadad9ab9afc87af60f38615a210a1a1d908d34e8796fe18108847b02cb51c1f6eb8f886237d1b0c8838edb5f4f9ef4
SSDEEP

24576:OVwhMBsRpeiKuSbWY7XM970ZNmapxyJoyLJnM:OVw+XUSqH970Zwa1S

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 4864 set thread context of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 956 set thread context of 3464	956	573b0103956eb1c9f12e2a2adcc77846.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	42	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
956	573b0103956eb1c9f12e2a2adcc77846.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 4864 wrote to memory of 956	4864	573b0103956eb1c9f12e2a2adcc77846.exe	91
PID 956 wrote to memory of 3464	956	573b0103956eb1c9f12e2a2adcc77846.exe	92
PID 956 wrote to memory of 3464	956	573b0103956eb1c9f12e2a2adcc77846.exe	92
PID 956 wrote to memory of 3464	956	573b0103956eb1c9f12e2a2adcc77846.exe	92
PID 956 wrote to memory of 3464	956	573b0103956eb1c9f12e2a2adcc77846.exe	92
PID 956 wrote to memory of 3464	956	573b0103956eb1c9f12e2a2adcc77846.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\573b0103956eb1c9f12e2a2adcc77846.exe
"C:\Users\Admin\AppData\Local\Temp\573b0103956eb1c9f12e2a2adcc77846.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\573b0103956eb1c9f12e2a2adcc77846.exe
  "C:\Users\Admin\AppData\Local\Temp\573b0103956eb1c9f12e2a2adcc77846.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:956
- - 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:3464

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/956-138-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/956-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/956-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/956-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3464-146-0x0000000000830000-0x0000000000896000-memory.dmp

Filesize
408KB

Download
memory/4864-132-0x0000000000430000-0x000000000050C000-memory.dmp

Filesize
880KB

Download
memory/4864-133-0x0000000005540000-0x0000000005AE4000-memory.dmp

Filesize
5.6MB

Download
memory/4864-134-0x0000000004EC0000-0x0000000004F52000-memory.dmp

Filesize
584KB

Download
memory/4864-135-0x0000000004EB0000-0x0000000004EBA000-memory.dmp

Filesize
40KB

Download
memory/4864-136-0x0000000008C90000-0x0000000008D2C000-memory.dmp

Filesize
624KB

Download