blustealer | cf30a2612dd37efc7dd30b05344149138d2ecf80225136deb483074bfc3f955c

General

Target

cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.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

C2

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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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 3972 set thread context of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 4212 set thread context of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe
3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 3304	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	92
PID 3972 wrote to memory of 3304	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	92
PID 3972 wrote to memory of 3304	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	92
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 3972 wrote to memory of 4212	3972	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	93
PID 4212 wrote to memory of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94
PID 4212 wrote to memory of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94
PID 4212 wrote to memory of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94
PID 4212 wrote to memory of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94
PID 4212 wrote to memory of 2796	4212	cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe
"C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe
  "C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe"
  2⤵
  PID:3304
- C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe
  "C:\Users\Admin\AppData\Local\Temp\cd101d3d19d5e797d9a151c9c4dd1db497f8e4ec680a7fb99a69b6af36634445.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4212
- - 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:2796

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/2796-147-0x0000000000450000-0x00000000004B6000-memory.dmp

Filesize
408KB

Download
memory/3972-135-0x0000000004B90000-0x0000000004B9A000-memory.dmp

Filesize
40KB

Download
memory/3972-136-0x00000000074A0000-0x000000000753C000-memory.dmp

Filesize
624KB

Download
memory/3972-137-0x00000000075B0000-0x0000000007616000-memory.dmp

Filesize
408KB

Download
memory/3972-132-0x00000000000A0000-0x00000000001DA000-memory.dmp

Filesize
1.2MB

Download
memory/3972-134-0x0000000004BE0000-0x0000000004C72000-memory.dmp

Filesize
584KB

Download
memory/3972-133-0x0000000005190000-0x0000000005734000-memory.dmp

Filesize
5.6MB

Download
memory/4212-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4212-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4212-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4212-148-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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