blustealer | 2a4fe1060c15849fad34754e02f548fc250f8749ab923f929c7497c0614c760b

General

Target

RFQ for supply of Stock Replenishment FI-2023-089.exe
Size

833KB
MD5

c3d43cf53c510fed679a621e5c9d0aea
SHA1

a8d367631072c110d99369209782f8ddd6de673f
SHA256

2a4fe1060c15849fad34754e02f548fc250f8749ab923f929c7497c0614c760b
SHA512

19d006881997d35cc57fff45b1e216d601d83b15045dcc75f8b6b617bb797c838a7cf0c3e0eec1e016817d5f3f429650a88a914bfaa9b9deeb62af18255437a8
SSDEEP

12288:El4SNuCXLzEfF0S2FXtBvFD3oNQLp1K6YZQ0MASVbNqRPXnBGTJ:EG9CvEfFv23o2LDK6WQOSVpwXnB2

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-1-5-21-1675742406-747946869-1029867430-1000\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
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3364 set thread context of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3916 set thread context of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3364	RFQ for supply of Stock Replenishment FI-2023-089.exe
3364	RFQ for supply of Stock Replenishment FI-2023-089.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3916	RFQ for supply of Stock Replenishment FI-2023-089.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 4104	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	91
PID 3364 wrote to memory of 4104	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	91
PID 3364 wrote to memory of 4104	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	91
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3364 wrote to memory of 3916	3364	RFQ for supply of Stock Replenishment FI-2023-089.exe	92
PID 3916 wrote to memory of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93
PID 3916 wrote to memory of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93
PID 3916 wrote to memory of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93
PID 3916 wrote to memory of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93
PID 3916 wrote to memory of 3600	3916	RFQ for supply of Stock Replenishment FI-2023-089.exe	93

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\RFQ for supply of Stock Replenishment FI-2023-089.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ for supply of Stock Replenishment FI-2023-089.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Users\Admin\AppData\Local\Temp\RFQ for supply of Stock Replenishment FI-2023-089.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ for supply of Stock Replenishment FI-2023-089.exe"
  2⤵
  PID:4104
- C:\Users\Admin\AppData\Local\Temp\RFQ for supply of Stock Replenishment FI-2023-089.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ for supply of Stock Replenishment FI-2023-089.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3916
- - 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:3600

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/3364-133-0x0000000000E00000-0x0000000000ED6000-memory.dmp

Filesize
856KB

Download
memory/3364-134-0x0000000005E20000-0x00000000063C4000-memory.dmp

Filesize
5.6MB

Download
memory/3364-135-0x0000000005910000-0x00000000059A2000-memory.dmp

Filesize
584KB

Download
memory/3364-136-0x00000000058A0000-0x00000000058AA000-memory.dmp

Filesize
40KB

Download
memory/3364-137-0x0000000003230000-0x0000000003240000-memory.dmp

Filesize
64KB

Download
memory/3364-138-0x0000000003230000-0x0000000003240000-memory.dmp

Filesize
64KB

Download
memory/3364-139-0x0000000007430000-0x00000000074CC000-memory.dmp

Filesize
624KB

Download
memory/3600-147-0x0000000000970000-0x00000000009D6000-memory.dmp

Filesize
408KB

Download
memory/3916-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3916-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3916-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3916-158-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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