blustealer | 219fff9b851792e8881d49d9bd62356ca8476f6fb70fd5e87ce8473d1e9557da

General

Target

document approval_Pdf.exe
Size

1.0MB
MD5

a01c97c35665af7491d2f458e36fd520
SHA1

a3f27af6b4ba853cc85cd9e8b6e0a26b44e41a8e
SHA256

708f366019c67cdec28a6950aa2a24f4ba274ebdadc35339ce1208ea971fc668
SHA512

55d9525b68abac877639ecfeff096cf0e6ef27a2fc880fa23cd3dfb101f83e445fe4d28c0fb286c4c13524480a3ebf3e5c0d2f2713d9401a2800859095bd12b3
SSDEEP

12288:47a2iNpVDhqX5KNS9+IUsvT77D8zdARM8hQDTau0DmcOeZmk/5DizSwNUs2naFaP:47a1jfKbrIzGml0tOgmADi4sDaQI

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-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\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 5068 set thread context of 2484	5068	document approval_Pdf.exe	93
PID 2484 set thread context of 3392	2484	document approval_Pdf.exe	94

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5068	document approval_Pdf.exe
5068	document approval_Pdf.exe
5068	document approval_Pdf.exe
5068	document approval_Pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5068	document approval_Pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2484	document approval_Pdf.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 5068 wrote to memory of 2220	5068	document approval_Pdf.exe	91
PID 5068 wrote to memory of 2220	5068	document approval_Pdf.exe	91
PID 5068 wrote to memory of 2220	5068	document approval_Pdf.exe	91
PID 5068 wrote to memory of 1992	5068	document approval_Pdf.exe	92
PID 5068 wrote to memory of 1992	5068	document approval_Pdf.exe	92
PID 5068 wrote to memory of 1992	5068	document approval_Pdf.exe	92
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 5068 wrote to memory of 2484	5068	document approval_Pdf.exe	93
PID 2484 wrote to memory of 3392	2484	document approval_Pdf.exe	94
PID 2484 wrote to memory of 3392	2484	document approval_Pdf.exe	94
PID 2484 wrote to memory of 3392	2484	document approval_Pdf.exe	94
PID 2484 wrote to memory of 3392	2484	document approval_Pdf.exe	94
PID 2484 wrote to memory of 3392	2484	document approval_Pdf.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068
- C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
  2⤵
  PID:2220
- C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
  2⤵
  PID:1992
- 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:2484
- - 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:3392

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/2484-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2484-150-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2484-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2484-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3392-148-0x00000000027E0000-0x00000000027F0000-memory.dmp

Filesize
64KB

Download
memory/3392-147-0x0000000000700000-0x0000000000766000-memory.dmp

Filesize
408KB

Download
memory/5068-136-0x0000000005960000-0x0000000005970000-memory.dmp

Filesize
64KB

Download
memory/5068-139-0x0000000006A60000-0x0000000006AFC000-memory.dmp

Filesize
624KB

Download
memory/5068-138-0x0000000005960000-0x0000000005970000-memory.dmp

Filesize
64KB

Download
memory/5068-137-0x0000000005630000-0x000000000563A000-memory.dmp

Filesize
40KB

Download
memory/5068-133-0x0000000000B80000-0x0000000000C8E000-memory.dmp

Filesize
1.1MB

Download
memory/5068-135-0x00000000056D0000-0x0000000005762000-memory.dmp

Filesize
584KB

Download
memory/5068-134-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download

Analysis

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