blustealer | c269b1931db163462343d0ecd8ef501e35e4da91c91f1464c8d526ef07a041bd

General

Target

QUOTATION _RFQ# 1043999.exe
Size

1.1MB
MD5

e434e422d6bb9bc02f9a4be0b1c41d1b
SHA1

af7347b789fb43b26a83f4864e50eedf7f62095e
SHA256

c269b1931db163462343d0ecd8ef501e35e4da91c91f1464c8d526ef07a041bd
SHA512

72ffed26dfa5617a70852e88d8058d6adebcbd771bc3f0102f8fcf9bdddcac2264b37d07b5fd4790c177ad87f81fce0253ff9fc85c22f8034c066e66df657552
SSDEEP

24576:nVlj9vY9URDvRtWBQDtty/ziBgqMSAqzQYkYJrrzZL:nVB9g9YDptWuryduIA1L

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2428 set thread context of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 1652 set thread context of 4564	1652	QUOTATION _RFQ# 1043999.exe	95

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 7 IoCs

pid	Process
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe
2428	QUOTATION _RFQ# 1043999.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2428	QUOTATION _RFQ# 1043999.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1652	QUOTATION _RFQ# 1043999.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 2428 wrote to memory of 1652	2428	QUOTATION _RFQ# 1043999.exe	94
PID 1652 wrote to memory of 4564	1652	QUOTATION _RFQ# 1043999.exe	95
PID 1652 wrote to memory of 4564	1652	QUOTATION _RFQ# 1043999.exe	95
PID 1652 wrote to memory of 4564	1652	QUOTATION _RFQ# 1043999.exe	95
PID 1652 wrote to memory of 4564	1652	QUOTATION _RFQ# 1043999.exe	95
PID 1652 wrote to memory of 4564	1652	QUOTATION _RFQ# 1043999.exe	95

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\QUOTATION _RFQ# 1043999.exe
"C:\Users\Admin\AppData\Local\Temp\QUOTATION _RFQ# 1043999.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2428
- C:\Users\Admin\AppData\Local\Temp\QUOTATION _RFQ# 1043999.exe
  "C:\Users\Admin\AppData\Local\Temp\QUOTATION _RFQ# 1043999.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1652
- - 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:4564

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

Loading Replay Monitor...

Downloads

memory/1652-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1652-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1652-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2428-133-0x0000000000B20000-0x0000000000C38000-memory.dmp

Filesize
1.1MB

Download
memory/2428-134-0x0000000005850000-0x0000000005860000-memory.dmp

Filesize
64KB

Download
memory/2428-135-0x0000000005E10000-0x00000000063B4000-memory.dmp

Filesize
5.6MB

Download
memory/2428-136-0x0000000005790000-0x0000000005822000-memory.dmp

Filesize
584KB

Download
memory/2428-137-0x0000000005850000-0x0000000005860000-memory.dmp

Filesize
64KB

Download
memory/2428-138-0x0000000006F80000-0x000000000701C000-memory.dmp

Filesize
624KB

Download
memory/4564-145-0x0000000000530000-0x0000000000596000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing