blustealer | 4391d7c58d08abbf4acc9adeb82c455478473566e0d258ad9aae9cbaacb801ac

General

Target

6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe
Size

852KB
MD5

573b0103956eb1c9f12e2a2adcc77846
SHA1

50e9fd321b9b1f39b6430b01941562ba924e40c0
SHA256

6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56
SHA512

ab26ac29ae7135cd6dcc5e95e6f9af290fadad9ab9afc87af60f38615a210a1a1d908d34e8796fe18108847b02cb51c1f6eb8f886237d1b0c8838edb5f4f9ef4
SSDEEP

24576:OVwhMBsRpeiKuSbWY7XM970ZNmapxyJoyLJnM:OVw+XUSqH970Zwa1S

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-1-5-21-2295526160-1155304984-640977766-1000\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
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1100 set thread context of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 4504 set thread context of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 1100 wrote to memory of 4504	1100	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	90
PID 4504 wrote to memory of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91
PID 4504 wrote to memory of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91
PID 4504 wrote to memory of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91
PID 4504 wrote to memory of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91
PID 4504 wrote to memory of 1432	4504	6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe	91

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\6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe
"C:\Users\Admin\AppData\Local\Temp\6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Users\Admin\AppData\Local\Temp\6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe
  "C:\Users\Admin\AppData\Local\Temp\6c912191a6853ca9717c37053a4ab7014d6980e48d846a8c777e7ee056cf4a56.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4504
- - 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:1432

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/1100-132-0x0000000000100000-0x00000000001DC000-memory.dmp

Filesize
880KB

Download
memory/1100-133-0x0000000005170000-0x0000000005714000-memory.dmp

Filesize
5.6MB

Download
memory/1100-134-0x0000000004BC0000-0x0000000004C52000-memory.dmp

Filesize
584KB

Download
memory/1100-135-0x0000000004B80000-0x0000000004B8A000-memory.dmp

Filesize
40KB

Download
memory/1100-136-0x00000000088F0000-0x000000000898C000-memory.dmp

Filesize
624KB

Download
memory/1432-145-0x0000000000550000-0x00000000005B6000-memory.dmp

Filesize
408KB

Download
memory/4504-138-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4504-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4504-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4504-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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