blustealer | 5a5ac8f9a24fe3d9eb8c6e2bd6d947af89612157cf70302449c3fe787bc7ae76

General

Target

5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe
Size

890KB
MD5

e0236718f5d4d70c2dc485d322834897
SHA1

f0276ffdd801d3440918269f5d880f0502bda55e
SHA256

5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081
SHA512

a7fae05a2aeb61acac13e682dcbff7bd000ecbb0ebc1350a62e528bc6abffe94db1e0cc0b71fa0b6cb90479e666b71dfa7406b8aeddff0bd9490d556a2fdc553
SSDEEP

24576:b4QWOM4PEXi53mZbPovZuFeBwEtumDDd+c6UcqK:b4QWV4Eq3mavEeBwEtfZ+cfcn

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

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-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1120 set thread context of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1096 set thread context of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1120 wrote to memory of 1096	1120	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	82
PID 1096 wrote to memory of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83
PID 1096 wrote to memory of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83
PID 1096 wrote to memory of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83
PID 1096 wrote to memory of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83
PID 1096 wrote to memory of 3512	1096	5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe	83

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe
"C:\Users\Admin\AppData\Local\Temp\5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Local\Temp\5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe
  "C:\Users\Admin\AppData\Local\Temp\5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1096
- - 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:3512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1096-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1096-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1096-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1096-148-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1120-133-0x0000000000C20000-0x0000000000D06000-memory.dmp

Filesize
920KB

Download
memory/1120-134-0x00000000032B0000-0x00000000032C0000-memory.dmp

Filesize
64KB

Download
memory/1120-135-0x0000000005D90000-0x0000000006334000-memory.dmp

Filesize
5.6MB

Download
memory/1120-136-0x0000000005890000-0x0000000005922000-memory.dmp

Filesize
584KB

Download
memory/1120-137-0x00000000032B0000-0x00000000032C0000-memory.dmp

Filesize
64KB

Download
memory/1120-138-0x00000000084A0000-0x000000000853C000-memory.dmp

Filesize
624KB

Download
memory/3512-146-0x00000000009E0000-0x0000000000A46000-memory.dmp

Filesize
408KB

Download

Analysis

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