blustealer | 640d26a67eb1438c3ea2371e196976e13454290aac77cf66692f3bb82d7c0b33

Analysis

max time kernel
144s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07-10-2022 17:23

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General

Target

doc033332421.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

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 4140 set thread context of 4696	4140	doc033332421.exe	81
PID 4696 set thread context of 1924	4696	cvtres.exe	85

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	25	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4696	cvtres.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4140 wrote to memory of 4696	4140	doc033332421.exe	81
PID 4696 wrote to memory of 1924	4696	cvtres.exe	85
PID 4696 wrote to memory of 1924	4696	cvtres.exe	85
PID 4696 wrote to memory of 1924	4696	cvtres.exe	85
PID 4696 wrote to memory of 1924	4696	cvtres.exe	85
PID 4696 wrote to memory of 1924	4696	cvtres.exe	85

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\doc033332421.exe
"C:\Users\Admin\AppData\Local\Temp\doc033332421.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4140
- 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:4696
- - 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:1924

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1924-141-0x0000000000E00000-0x0000000000E66000-memory.dmp

Filesize
408KB

Download
memory/1924-142-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/4140-132-0x00000000003A0000-0x0000000000420000-memory.dmp

Filesize
512KB

Download
memory/4696-134-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4696-136-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4696-139-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4696-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download