blustealer | f4537ab3fdeb176d352dca40facb96f493d634f7d03140e2275be2ea33678e33

General

Target

a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe
Size

851KB
MD5

3d695f1b4db5a0635d43e1cd1b9d48ae
SHA1

377936812ab222b69380049be6ad28208e135603
SHA256

a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0
SHA512

268e47ebb3d159ee3c33a0b0b5d8c4a272430544c01ff2c66c7918fabcba66e784edebd435e1200f0c0ce44c317b771f3b076d4548f9fbcd905079d47a434185
SSDEEP

12288:Y+vTN8RVtfK8cyo7qyy8SpCrqLKL2MhkHEmY4FrHSzn7rwR8mGyqF7qbnZ4Xb:Y6TNUVU8cmJ4rM3akk14JH+n78Z4Xb

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-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3232 set thread context of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3220 set thread context of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.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	44	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3232 wrote to memory of 3220	3232	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	91
PID 3220 wrote to memory of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	92
PID 3220 wrote to memory of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	92
PID 3220 wrote to memory of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	92
PID 3220 wrote to memory of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	92
PID 3220 wrote to memory of 1336	3220	a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe
"C:\Users\Admin\AppData\Local\Temp\a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3232
- C:\Users\Admin\AppData\Local\Temp\a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe
  "C:\Users\Admin\AppData\Local\Temp\a83688213da481b066908e16d7a2206180627bcef8c69e4fe756dc06c5c35ec0.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3220
- - 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:1336

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/1336-148-0x0000000004A30000-0x0000000004A40000-memory.dmp

Filesize
64KB

Download
memory/1336-147-0x0000000000500000-0x0000000000566000-memory.dmp

Filesize
408KB

Download
memory/3220-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3220-150-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3220-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3220-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3232-136-0x0000000004B50000-0x0000000004B5A000-memory.dmp

Filesize
40KB

Download
memory/3232-139-0x0000000007E50000-0x0000000007EEC000-memory.dmp

Filesize
624KB

Download
memory/3232-138-0x0000000004AE0000-0x0000000004AF0000-memory.dmp

Filesize
64KB

Download
memory/3232-137-0x0000000004AE0000-0x0000000004AF0000-memory.dmp

Filesize
64KB

Download
memory/3232-133-0x00000000000A0000-0x000000000017C000-memory.dmp

Filesize
880KB

Download
memory/3232-135-0x0000000004B70000-0x0000000004C02000-memory.dmp

Filesize
584KB

Download
memory/3232-134-0x0000000005040000-0x00000000055E4000-memory.dmp

Filesize
5.6MB

Download

Analysis

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