blustealer | 72b53805a4f865668bae4e6623be68b8c47e672910f5ebbbe42cbd6605ad35e1

General

Target

Purchase Order.exe
Size

1012KB
MD5

7488038af7f8186a5f38f337b2a97a27
SHA1

1ed765da594deb249734c196d2d5ddb45eb888cb
SHA256

72b53805a4f865668bae4e6623be68b8c47e672910f5ebbbe42cbd6605ad35e1
SHA512

fd361d4355c6e419ccfa3ec882612495e21e6f61aa77666132f9749827940e5c7cc5949afc8b2f32ca30b81d8863056d2e8743bf6fc37e760fba6c0e447f9c43
SSDEEP

24576:C1oN67sWLUxMdLLBGpriRrl4Jiz69s2i/hd4pWgOj1zZnO:CkFxMdPqGRaJK/kpWgE

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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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 1416 set thread context of 756	1416	Purchase Order.exe	27
PID 756 set thread context of 2040	756	Purchase Order.exe	28

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1416	Purchase Order.exe
1416	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1416	Purchase Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
756	Purchase Order.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 1416 wrote to memory of 756	1416	Purchase Order.exe	27
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28
PID 756 wrote to memory of 2040	756	Purchase Order.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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:1416
- 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:756
- - 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:2040

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/756-63-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-83-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-68-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-60-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/756-61-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1416-59-0x0000000005070000-0x0000000005114000-memory.dmp

Filesize
656KB

Download
memory/1416-54-0x0000000000FE0000-0x00000000010E4000-memory.dmp

Filesize
1.0MB

Download
memory/1416-58-0x0000000004F90000-0x0000000005068000-memory.dmp

Filesize
864KB

Download
memory/1416-57-0x00000000004E0000-0x00000000004EC000-memory.dmp

Filesize
48KB

Download
memory/1416-56-0x0000000000550000-0x0000000000568000-memory.dmp

Filesize
96KB

Download
memory/1416-55-0x0000000074DC1000-0x0000000074DC3000-memory.dmp

Filesize
8KB

Download
memory/2040-73-0x0000000000230000-0x0000000000296000-memory.dmp

Filesize
408KB

Download
memory/2040-75-0x0000000000230000-0x0000000000296000-memory.dmp

Filesize
408KB

Download
memory/2040-78-0x0000000000230000-0x0000000000296000-memory.dmp

Filesize
408KB

Download
memory/2040-80-0x0000000000230000-0x0000000000296000-memory.dmp

Filesize
408KB

Download
memory/2040-82-0x0000000000860000-0x000000000091C000-memory.dmp

Filesize
752KB

Download

Analysis

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