blustealer | 13537e7d58eb6312b80c2abd796be6569ec2d99a41c20913629db6c1d5c12e0b

General

Target

RFQ 10102022.exe
Size

1.2MB
MD5

9b9068806d229820ef4977c37b9ece31
SHA1

d482d3e05dadf33a8cfc41ed3d33b700c9c5afe3
SHA256

13537e7d58eb6312b80c2abd796be6569ec2d99a41c20913629db6c1d5c12e0b
SHA512

c94c874d9f7cae44be88e3b4ea2121cd8475d039f886b93b963c231d14b2012b52943b3f4aa229773ff8b747111ad0943f3846bfe05b47a2d551bc3cfc12490e
SSDEEP

24576:h11jcQRG1e/zhH2b7Kc41/r8bAVx8+c8j7P36vg7dR:h1OQSgzhRc41/gqBc8j7eg7d

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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4988 set thread context of 2136	4988	RFQ 10102022.exe	95
PID 2136 set thread context of 4696	2136	RFQ 10102022.exe	96

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4988	RFQ 10102022.exe
4988	RFQ 10102022.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4988	RFQ 10102022.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2136	RFQ 10102022.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 4364	4988	RFQ 10102022.exe	94
PID 4988 wrote to memory of 4364	4988	RFQ 10102022.exe	94
PID 4988 wrote to memory of 4364	4988	RFQ 10102022.exe	94
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 4988 wrote to memory of 2136	4988	RFQ 10102022.exe	95
PID 2136 wrote to memory of 4696	2136	RFQ 10102022.exe	96
PID 2136 wrote to memory of 4696	2136	RFQ 10102022.exe	96
PID 2136 wrote to memory of 4696	2136	RFQ 10102022.exe	96
PID 2136 wrote to memory of 4696	2136	RFQ 10102022.exe	96
PID 2136 wrote to memory of 4696	2136	RFQ 10102022.exe	96

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe"
  2⤵
  PID:4364
- C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 10102022.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2136
- - 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:4696

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/2136-148-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4696-147-0x0000000000E20000-0x0000000000E86000-memory.dmp

Filesize
408KB

Download
memory/4988-132-0x0000000000840000-0x0000000000980000-memory.dmp

Filesize
1.2MB

Download
memory/4988-137-0x000000000A0F0000-0x000000000A156000-memory.dmp

Filesize
408KB

Download
memory/4988-136-0x0000000009FE0000-0x000000000A07C000-memory.dmp

Filesize
624KB

Download
memory/4988-135-0x00000000053B0000-0x00000000053BA000-memory.dmp

Filesize
40KB

Download
memory/4988-134-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/4988-133-0x0000000005980000-0x0000000005F24000-memory.dmp

Filesize
5.6MB

Download

Analysis

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