blustealer | 9b2cc74fd99963d9d819651be3b84c109bf3b375a4b9f26c6ef31427d97011fb

Analysis

max time kernel
147s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
13-09-2022 11:02

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General

Target

bl draft shipping Documents.exe
Size

1.2MB
MD5

9525bd775591fc765660eeb64002741f
SHA1

0cb836092ba969107916c7445c790876a61912a6
SHA256

cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445
SHA512

4ecea438e61f1b5decde0218ccf38146fadbda35531fe8b79ddd5cd47014d185cff8c6d94e6f4e1aaa7478d12c20b2c9d392ccbfa642be97c1b272003bb3df10
SSDEEP

24576:C5nVyP/M6tQ5Cr0qwvNIQFQdS6vK2NqM4:IVA/TtQclwvNICQpvK2NqF

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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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 736 set thread context of 1248	736	bl draft shipping Documents.exe	100
PID 1248 set thread context of 3288	1248	bl draft shipping Documents.exe	101

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1248	bl draft shipping Documents.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 736 wrote to memory of 1248	736	bl draft shipping Documents.exe	100
PID 1248 wrote to memory of 3288	1248	bl draft shipping Documents.exe	101
PID 1248 wrote to memory of 3288	1248	bl draft shipping Documents.exe	101
PID 1248 wrote to memory of 3288	1248	bl draft shipping Documents.exe	101
PID 1248 wrote to memory of 3288	1248	bl draft shipping Documents.exe	101
PID 1248 wrote to memory of 3288	1248	bl draft shipping Documents.exe	101

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\bl draft shipping Documents.exe
"C:\Users\Admin\AppData\Local\Temp\bl draft shipping Documents.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:736
- C:\Users\Admin\AppData\Local\Temp\bl draft shipping Documents.exe
  "C:\Users\Admin\AppData\Local\Temp\bl draft shipping Documents.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1248
- - 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:3288

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/736-132-0x0000000000400000-0x000000000053A000-memory.dmp

Filesize
1.2MB

Download
memory/736-133-0x00000000053B0000-0x0000000005954000-memory.dmp

Filesize
5.6MB

Download
memory/736-134-0x0000000004EE0000-0x0000000004F72000-memory.dmp

Filesize
584KB

Download
memory/736-135-0x0000000004F90000-0x0000000004F9A000-memory.dmp

Filesize
40KB

Download
memory/736-136-0x0000000007800000-0x000000000789C000-memory.dmp

Filesize
624KB

Download
memory/736-137-0x0000000007910000-0x0000000007976000-memory.dmp

Filesize
408KB

Download
memory/1248-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1248-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1248-144-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1248-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3288-146-0x0000000000B00000-0x0000000000B66000-memory.dmp

Filesize
408KB

Download