blustealer | 219fff9b851792e8881d49d9bd62356ca8476f6fb70fd5e87ce8473d1e9557da

General

Target

document approval_Pdf.exe
Size

1.0MB
MD5

a01c97c35665af7491d2f458e36fd520
SHA1

a3f27af6b4ba853cc85cd9e8b6e0a26b44e41a8e
SHA256

708f366019c67cdec28a6950aa2a24f4ba274ebdadc35339ce1208ea971fc668
SHA512

55d9525b68abac877639ecfeff096cf0e6ef27a2fc880fa23cd3dfb101f83e445fe4d28c0fb286c4c13524480a3ebf3e5c0d2f2713d9401a2800859095bd12b3
SSDEEP

12288:47a2iNpVDhqX5KNS9+IUsvT77D8zdARM8hQDTau0DmcOeZmk/5DizSwNUs2naFaP:47a1jfKbrIzGml0tOgmADi4sDaQI

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-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\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 2040 set thread context of 1664	2040	document approval_Pdf.exe	29
PID 1664 set thread context of 1820	1664	document approval_Pdf.exe	30

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
2040	document approval_Pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2040	document approval_Pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1664	document approval_Pdf.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 1488	2040	document approval_Pdf.exe	28
PID 2040 wrote to memory of 1488	2040	document approval_Pdf.exe	28
PID 2040 wrote to memory of 1488	2040	document approval_Pdf.exe	28
PID 2040 wrote to memory of 1488	2040	document approval_Pdf.exe	28
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 2040 wrote to memory of 1664	2040	document approval_Pdf.exe	29
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30
PID 1664 wrote to memory of 1820	1664	document approval_Pdf.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
"C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
  2⤵
  PID:1488
- C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\document approval_Pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1664
- - 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:1820

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/1664-62-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-81-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-69-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-67-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1664-64-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-63-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1820-73-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1820-75-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1820-80-0x0000000004B90000-0x0000000004C4C000-memory.dmp

Filesize
752KB

Download
memory/1820-79-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1820-77-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1820-74-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2040-58-0x0000000000520000-0x000000000052C000-memory.dmp

Filesize
48KB

Download
memory/2040-54-0x0000000000010000-0x000000000011E000-memory.dmp

Filesize
1.1MB

Download
memory/2040-56-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/2040-57-0x0000000000510000-0x0000000000524000-memory.dmp

Filesize
80KB

Download
memory/2040-61-0x0000000004860000-0x00000000048D6000-memory.dmp

Filesize
472KB

Download
memory/2040-59-0x00000000058F0000-0x00000000059A8000-memory.dmp

Filesize
736KB

Download
memory/2040-60-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/2040-55-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download

Analysis

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