blustealer | 0f9109bc99a6c0cb299d1520099a8ca2d87d8ca4e1806fde417b60cf6dd233f9

General

Target

Purchase Order.exe
Size

882KB
MD5

80f8b83ff944f41eb4b301b1976946ec
SHA1

4766b46ebc3674f8198319d6ad164b04e6fe39b2
SHA256

0f9109bc99a6c0cb299d1520099a8ca2d87d8ca4e1806fde417b60cf6dd233f9
SHA512

417e941be626bb36baab3869c77133b8efeeca7d205bfb73ce5a433a459dc2b78e13945e39b3ecd01306b3027c6d53781b3f63debe42a8592e375e3719302e73
SSDEEP

24576:7/nche0sofbtJZf78cOk6K05Gr1Q5c5bv:7PchBJZf7FCGr1Q5Kb

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5797428905:AAGaRRXGZN1d9GGFd3sE5x4uSpCGF0PU4m4/sendMessage?chat_id=1251788325

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-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4356 set thread context of 4552	4356	Purchase Order.exe	90
PID 4552 set thread context of 1412	4552	Purchase Order.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4356	Purchase Order.exe
4356	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	Purchase Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4552	Purchase Order.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 2588	4356	Purchase Order.exe	89
PID 4356 wrote to memory of 2588	4356	Purchase Order.exe	89
PID 4356 wrote to memory of 2588	4356	Purchase Order.exe	89
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4356 wrote to memory of 4552	4356	Purchase Order.exe	90
PID 4552 wrote to memory of 1412	4552	Purchase Order.exe	91
PID 4552 wrote to memory of 1412	4552	Purchase Order.exe	91
PID 4552 wrote to memory of 1412	4552	Purchase Order.exe	91
PID 4552 wrote to memory of 1412	4552	Purchase Order.exe	91
PID 4552 wrote to memory of 1412	4552	Purchase Order.exe	91

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  PID:2588
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4552
- - 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:1412

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/1412-150-0x0000000001020000-0x0000000001086000-memory.dmp

Filesize
408KB

Download
memory/4356-136-0x00000000002B0000-0x0000000000392000-memory.dmp

Filesize
904KB

Download
memory/4356-137-0x00000000052E0000-0x0000000005884000-memory.dmp

Filesize
5.6MB

Download
memory/4356-138-0x0000000004DD0000-0x0000000004E62000-memory.dmp

Filesize
584KB

Download
memory/4356-139-0x0000000004D60000-0x0000000004D6A000-memory.dmp

Filesize
40KB

Download
memory/4356-140-0x0000000004F60000-0x0000000004F70000-memory.dmp

Filesize
64KB

Download
memory/4356-141-0x0000000004F60000-0x0000000004F70000-memory.dmp

Filesize
64KB

Download
memory/4356-142-0x0000000007D70000-0x0000000007E0C000-memory.dmp

Filesize
624KB

Download
memory/4552-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4552-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4552-149-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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