blustealer | 1563ee942b822e7f3b936cf6b58bfc64a723f964ffb0a4da15000f6f8161d9a3

General

Target

Technical specification.exe
Size

1.2MB
MD5

b63bd686cca7a0de40ba595e1c55c3df
SHA1

c8a7b28371decc264b410bf48beded50b8038a4c
SHA256

6f5748c69eb521632a3ba9757852672895c983c0886e8cddaa4dd4266f2e5a46
SHA512

c6f11a341630e6accfe78736f13286ab674a7095c14074fb1a84c96d5b587e8f79060d80957164760896347fcb85cf7708a9745fe22e9f5b6df86fcd0303752e
SSDEEP

12288:c2iNIJ2uJUpVLOmO3/XAonActMpNgsUF2SEFvxnvXjNWODQLadmpA8SDhY+Cc0XL:c1nppUPA9HlUsvZoKNmOrT0XwJJl

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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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 740 set thread context of 1760	740	Technical specification.exe	28
PID 1760 set thread context of 1700	1760	Technical specification.exe	29

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 1 IoCs

pid	Process
740	Technical specification.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	740	Technical specification.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1760	Technical specification.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 740 wrote to memory of 1572	740	Technical specification.exe	27
PID 740 wrote to memory of 1572	740	Technical specification.exe	27
PID 740 wrote to memory of 1572	740	Technical specification.exe	27
PID 740 wrote to memory of 1572	740	Technical specification.exe	27
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 740 wrote to memory of 1760	740	Technical specification.exe	28
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29
PID 1760 wrote to memory of 1700	1760	Technical specification.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Technical specification.exe
"C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:740
- C:\Users\Admin\AppData\Local\Temp\Technical specification.exe
  "C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
  2⤵
  PID:1572
- C:\Users\Admin\AppData\Local\Temp\Technical specification.exe
  "C:\Users\Admin\AppData\Local\Temp\Technical specification.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1760
- - 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:1700

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/740-54-0x0000000000D90000-0x0000000000EC0000-memory.dmp

Filesize
1.2MB

Download
memory/740-55-0x0000000075A81000-0x0000000075A83000-memory.dmp

Filesize
8KB

Download
memory/740-56-0x0000000000910000-0x0000000000928000-memory.dmp

Filesize
96KB

Download
memory/740-57-0x0000000000550000-0x000000000055C000-memory.dmp

Filesize
48KB

Download
memory/740-58-0x0000000005480000-0x000000000554C000-memory.dmp

Filesize
816KB

Download
memory/740-59-0x0000000005B30000-0x0000000005BA8000-memory.dmp

Filesize
480KB

Download
memory/1700-78-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1700-82-0x0000000001310000-0x00000000013CC000-memory.dmp

Filesize
752KB

Download
memory/1700-80-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1700-75-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1700-73-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1760-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-68-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-60-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-61-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-63-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1760-83-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

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