blustealer | 36dcb265b7a10f3e1ccf2f51e28b7c086675ac2729e19075cf34cb59ba17105f

Analysis

max time kernel
146s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
15-05-2023 10:36

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General

Target

3.exe
Size

855KB
MD5

2616d8fe5d13f7a2c5f35428c4e76f0f
SHA1

58ebeeb5b7dd11a8fd372e647c766eb294e2c802
SHA256

36dcb265b7a10f3e1ccf2f51e28b7c086675ac2729e19075cf34cb59ba17105f
SHA512

f5a88e15ec32392095c620b5e765ccb3ff9bac896146f6b226e3a012ab8d7c08e263fa4d3c3b55d1d8f4532cef849af1a9f32b3d492245c787e99cf53c953a4c
SSDEEP

12288:j8ysS5ZKeMMOZ/g2cUOjoYIh5V0wmf2MhDHVb0V5fPTMXtg0mpEpo+g9cK8CD:5jKpejo1b0phDHVePj0mpEpo+4cOD

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-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\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 448 set thread context of 1772	448	3.exe	91
PID 1772 set thread context of 3708	1772	3.exe	92

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1772	3.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 448 wrote to memory of 1772	448	3.exe	91
PID 1772 wrote to memory of 3708	1772	3.exe	92
PID 1772 wrote to memory of 3708	1772	3.exe	92
PID 1772 wrote to memory of 3708	1772	3.exe	92
PID 1772 wrote to memory of 3708	1772	3.exe	92
PID 1772 wrote to memory of 3708	1772	3.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\3.exe
"C:\Users\Admin\AppData\Local\Temp\3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:448
- C:\Users\Admin\AppData\Local\Temp\3.exe
  "C:\Users\Admin\AppData\Local\Temp\3.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1772
- - 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:3708

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

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Downloads

memory/448-133-0x00000000004B0000-0x000000000058C000-memory.dmp

Filesize
880KB

Download
memory/448-134-0x0000000005580000-0x0000000005B24000-memory.dmp

Filesize
5.6MB

Download
memory/448-135-0x0000000004FD0000-0x0000000005062000-memory.dmp

Filesize
584KB

Download
memory/448-136-0x0000000004F40000-0x0000000004F4A000-memory.dmp

Filesize
40KB

Download
memory/448-137-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/448-138-0x00000000051A0000-0x00000000051B0000-memory.dmp

Filesize
64KB

Download
memory/448-139-0x0000000006AB0000-0x0000000006B4C000-memory.dmp

Filesize
624KB

Download
memory/1772-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1772-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1772-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3708-147-0x0000000001220000-0x0000000001286000-memory.dmp

Filesize
408KB

Download
memory/3708-148-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download