blustealer | 640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33

General

Target

640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe
Size

509KB
MD5

c7ece13890b374467b4857ce1afaf2e6
SHA1

e27145f0208a85564052b66d83ef7223154f22d6
SHA256

640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33
SHA512

46adbb990077c0dbb76c2c2282ce3ad5d36134c38d10195dd74ddacc4cd4103e4857920de0542d043c188dbacb3900f37bafe3a091745e089cb07d1017c36379
SSDEEP

12288:yGZPq/wha6qc239Cf6mu57HFapiR9eJg+Fq085opbVq6:yGVL06j239m6R5782yF58qpb

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\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4328 set thread context of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4764 set thread context of 4900	4764	cvtres.exe	86

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe
4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe
4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe
4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4764	cvtres.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 2840	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	83
PID 4328 wrote to memory of 2840	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	83
PID 4328 wrote to memory of 2840	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	83
PID 4328 wrote to memory of 3720	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	84
PID 4328 wrote to memory of 3720	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	84
PID 4328 wrote to memory of 3720	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	84
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4328 wrote to memory of 4764	4328	640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe	85
PID 4764 wrote to memory of 4900	4764	cvtres.exe	86
PID 4764 wrote to memory of 4900	4764	cvtres.exe	86
PID 4764 wrote to memory of 4900	4764	cvtres.exe	86
PID 4764 wrote to memory of 4900	4764	cvtres.exe	86
PID 4764 wrote to memory of 4900	4764	cvtres.exe	86

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\640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe
"C:\Users\Admin\AppData\Local\Temp\640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  PID:2840
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  PID:3720
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4764
- - 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:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4328-132-0x0000000000030000-0x00000000000B0000-memory.dmp

Filesize
512KB

Download
memory/4764-136-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4764-138-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4764-141-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4764-145-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4900-143-0x0000000000E00000-0x0000000000E66000-memory.dmp

Filesize
408KB

Download
memory/4900-144-0x00000000057A0000-0x000000000583C000-memory.dmp

Filesize
624KB

Download

Analysis

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