blustealer | 708f366019c67cdec28a6950aa2a24f4ba274ebdadc35339ce1208ea971fc668

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2023, 10:07

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General

Target
document approval_Pdf.exe
Size 1.0MB
Sample230406-l5m1eace73
SHA256 708f366019c67cdec28a6950aa2a24f4ba274ebdadc35339ce1208ea971fc668
MD5 a01c97c35665af7491d2f458e36fd520
SHA1 a3f27af6b4ba853cc85cd9e8b6e0a26b44e41a8e
SHA512 55d9525b68abac877639ecfeff096cf0e6ef27a2fc880fa23cd3dfb101f83e445fe4d28c0fb286c4c13524480a3ebf3e5c0d2f2713d9401a2800859095bd12b3
SSDEEP 12288:47a2iNpVDhqX5KNS9+IUsvT77D8zdARM8hQDTau0DmcOeZmk/5DizSwNUs2naFaP:47a1jfKbrIzGml0tOgmADi4sDaQI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

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-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\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 2084 set thread context of 976	2084	document approval_Pdf.exe	97
PID 976 set thread context of 4016	976	document approval_Pdf.exe	98

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
976	document approval_Pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 2084 wrote to memory of 976	2084	document approval_Pdf.exe	97
PID 976 wrote to memory of 4016	976	document approval_Pdf.exe	98
PID 976 wrote to memory of 4016	976	document approval_Pdf.exe	98
PID 976 wrote to memory of 4016	976	document approval_Pdf.exe	98
PID 976 wrote to memory of 4016	976	document approval_Pdf.exe	98
PID 976 wrote to memory of 4016	976	document approval_Pdf.exe	98

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
"C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:976
- - 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:4016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/976-140-0x0000000000400000-0x000000000046E000-memory.dmp

Download

memory/976-146-0x0000000000400000-0x000000000046E000-memory.dmp

Download

memory/976-143-0x0000000000400000-0x000000000046E000-memory.dmp

Download

memory/2084-136-0x0000000005080000-0x000000000508A000-memory.dmp

Download

memory/2084-137-0x00000000052E0000-0x00000000052F0000-memory.dmp

Download

memory/2084-138-0x00000000052E0000-0x00000000052F0000-memory.dmp

Download

memory/2084-139-0x0000000000FB0000-0x000000000104C000-memory.dmp

Download

memory/2084-133-0x00000000005E0000-0x00000000006EE000-memory.dmp

Download

memory/2084-135-0x00000000050F0000-0x0000000005182000-memory.dmp

Download

memory/2084-134-0x00000000056A0000-0x0000000005C44000-memory.dmp

Download

memory/4016-147-0x0000000000560000-0x00000000005C6000-memory.dmp

Download

memory/4016-149-0x0000000004FA0000-0x0000000004FB0000-memory.dmp

Download

memory/4016-159-0x0000000004FA0000-0x0000000004FB0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads