blustealer | 1d1fd5b8f91ec3ddef5627bd3c94761b912e6a1c9f64501136f972d931fb22ea

General

Target

PTTEM CONTRACTS LK-39874672320.pdf.exe
Size

165KB
MD5

dc2ab92a4dfeb135be66abab9f79dfd1
SHA1

c1803cdea807da20a3b910677465fc154e556392
SHA256

1d1fd5b8f91ec3ddef5627bd3c94761b912e6a1c9f64501136f972d931fb22ea
SHA512

dd0657a9c8acd70774ff9805f1a06c1650a8e588dddbc8355eb89f9a38d803788e84ba3deeb402d7db1f28012494ea3dfcbbd906a7c4e63e65b4da6f9df3aeea

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5449766717:AAHzRorvKI5URgvleGHlq6ZvqElY68-XL18/sendMessage?chat_id=1293496579

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer
Downloads MZ/PE file

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cFRPDbtZ.lnk	PTTEM CONTRACTS LK-39874672320.pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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 4568 set thread context of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 1376 set thread context of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1376	PTTEM CONTRACTS LK-39874672320.pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 4568 wrote to memory of 1376	4568	PTTEM CONTRACTS LK-39874672320.pdf.exe	84
PID 1376 wrote to memory of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85
PID 1376 wrote to memory of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85
PID 1376 wrote to memory of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85
PID 1376 wrote to memory of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85
PID 1376 wrote to memory of 4560	1376	PTTEM CONTRACTS LK-39874672320.pdf.exe	85

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PTTEM CONTRACTS LK-39874672320.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PTTEM CONTRACTS LK-39874672320.pdf.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Users\Admin\AppData\Local\Temp\PTTEM CONTRACTS LK-39874672320.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\PTTEM CONTRACTS LK-39874672320.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1376
- - 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:4560

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/1376-137-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1376-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1376-142-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1376-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4560-144-0x0000000000900000-0x0000000000966000-memory.dmp

Filesize
408KB

Download
memory/4568-133-0x0000000000EA0000-0x0000000000ED0000-memory.dmp

Filesize
192KB

Download
memory/4568-134-0x0000000005830000-0x00000000058CC000-memory.dmp

Filesize
624KB

Download
memory/4568-135-0x0000000005E80000-0x0000000006424000-memory.dmp

Filesize
5.6MB

Download

Analysis

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