blustealer | 08e9b87ddb401b7d06928ddc9034e7057b57667ed2b3c2f4b8ec9209aeaca055

Analysis

max time kernel
144s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2023 13:11

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General

Target

INWARD RMT.exe
Size

945KB
MD5

eb56c4825ec85ad8a31769d718cfff54
SHA1

7a3ec799412a4fdd3af8a370aa064f66edb4b653
SHA256

08e9b87ddb401b7d06928ddc9034e7057b57667ed2b3c2f4b8ec9209aeaca055
SHA512

e16b1e4c1af98441633feb7edfcfaf29683d88fe7ce3f25afbd9950896f7d08d9ec6b4ff70e3298535db62f2cda31a4af4bee3353141b7d411534adc0d0894f5
SSDEEP

24576:ZWqTC/fbyAvWIKZKGcd9FGo28HusyPVPbVKY0Zv:ZjOvW9FyWl8ORPLKYQv

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-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\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 4548 set thread context of 1228	4548	INWARD RMT.exe	92
PID 1228 set thread context of 2136	1228	INWARD RMT.exe	93

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

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1228	INWARD RMT.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 4548 wrote to memory of 1228	4548	INWARD RMT.exe	92
PID 1228 wrote to memory of 2136	1228	INWARD RMT.exe	93
PID 1228 wrote to memory of 2136	1228	INWARD RMT.exe	93
PID 1228 wrote to memory of 2136	1228	INWARD RMT.exe	93
PID 1228 wrote to memory of 2136	1228	INWARD RMT.exe	93
PID 1228 wrote to memory of 2136	1228	INWARD RMT.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\INWARD RMT.exe
"C:\Users\Admin\AppData\Local\Temp\INWARD RMT.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4548
- C:\Users\Admin\AppData\Local\Temp\INWARD RMT.exe
  "C:\Users\Admin\AppData\Local\Temp\INWARD RMT.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1228
- - 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:2136

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

Replay Monitor

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Downloads

memory/1228-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1228-150-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1228-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1228-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2136-148-0x0000000005400000-0x0000000005410000-memory.dmp

Filesize
64KB

Download
memory/2136-147-0x0000000000FC0000-0x0000000001026000-memory.dmp

Filesize
408KB

Download
memory/4548-136-0x0000000004F60000-0x0000000004F6A000-memory.dmp

Filesize
40KB

Download
memory/4548-139-0x0000000006680000-0x000000000671C000-memory.dmp

Filesize
624KB

Download
memory/4548-138-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4548-137-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/4548-133-0x00000000004B0000-0x00000000005A2000-memory.dmp

Filesize
968KB

Download
memory/4548-135-0x0000000004FB0000-0x0000000005042000-memory.dmp

Filesize
584KB

Download
memory/4548-134-0x00000000054C0000-0x0000000005A64000-memory.dmp

Filesize
5.6MB

Download