blustealer | b1bfefffd758eb6a51517edbd4df1ec4494519e35d06a2f411b106c85e9066e9

General

Target

Draft BL.exe
Size

823KB
MD5

ad39b3a11ed93999ec47bb2004822923
SHA1

a91442c5fc2a806f2a73110d761f3c2d0923d694
SHA256

642788b753c8802d30666e5d6d2a2e4c9d810583e3af7fcb2983dd219c4526e7
SHA512

839c6a08742c094f8d972300c74e422c93b09082aa512e63e85ae6f4d769c59e09d5c4313ea5f189095dbb257cea32b23785f99efaef40a7ec8692907ca742c6
SSDEEP

24576:GPPBLdk29XW6to9ejUKAQLSiXX/i/SUm:G/LXWexYLqfmSUm

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-1-5-21-508929744-1894537824-211734425-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\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 1520 set thread context of 1756	1520	Draft BL.exe	88
PID 1756 set thread context of 3120	1756	Draft BL.exe	89

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1520	Draft BL.exe
1520	Draft BL.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	Draft BL.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1756	Draft BL.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2168	1520	Draft BL.exe	87
PID 1520 wrote to memory of 2168	1520	Draft BL.exe	87
PID 1520 wrote to memory of 2168	1520	Draft BL.exe	87
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1520 wrote to memory of 1756	1520	Draft BL.exe	88
PID 1756 wrote to memory of 3120	1756	Draft BL.exe	89
PID 1756 wrote to memory of 3120	1756	Draft BL.exe	89
PID 1756 wrote to memory of 3120	1756	Draft BL.exe	89
PID 1756 wrote to memory of 3120	1756	Draft BL.exe	89
PID 1756 wrote to memory of 3120	1756	Draft BL.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Draft BL.exe
"C:\Users\Admin\AppData\Local\Temp\Draft BL.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Users\Admin\AppData\Local\Temp\Draft BL.exe
  "C:\Users\Admin\AppData\Local\Temp\Draft BL.exe"
  2⤵
  PID:2168
- C:\Users\Admin\AppData\Local\Temp\Draft BL.exe
  "C:\Users\Admin\AppData\Local\Temp\Draft BL.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1756
- - 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:3120

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/1520-139-0x0000000006690000-0x000000000672C000-memory.dmp

Filesize
624KB

Download
memory/1520-134-0x00000000052D0000-0x0000000005874000-memory.dmp

Filesize
5.6MB

Download
memory/1520-135-0x0000000004D20000-0x0000000004DB2000-memory.dmp

Filesize
584KB

Download
memory/1520-136-0x0000000004CD0000-0x0000000004CDA000-memory.dmp

Filesize
40KB

Download
memory/1520-137-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/1520-138-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/1520-133-0x0000000000230000-0x0000000000304000-memory.dmp

Filesize
848KB

Download
memory/1756-140-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1756-143-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1756-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1756-159-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3120-147-0x0000000000A00000-0x0000000000A66000-memory.dmp

Filesize
408KB

Download
memory/3120-148-0x0000000005170000-0x0000000005180000-memory.dmp

Filesize
64KB

Download

Analysis

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