blustealer | 1b49edb66975cc308188fcf58a350d27a645e8ad754aff84541b8a82736bd005

Analysis

max time kernel
109s
max time network
41s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
18-10-2022 19:16

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General

Target

Dekont.PDF.exe
Size

1.3MB
MD5

dd351940dad3168f60d1b3d7cd10347b
SHA1

9cf4ff25559de1a6cbaeac06123abf04c2ec12b0
SHA256

33f6177e2d98b8b7a93daed5f05883a111f706ed3bcba925c9740c4feac6111e
SHA512

1cd9340b1ca9e5c460f69cda5410daa0a8791505b0367a0794b7f2f8fcd2a822d13574c0313fd1997525208a3af2a4e3a9a391d006e2576de13bd3792a78c8fa
SSDEEP

24576:hExxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNusswO7Sayb:ualphF78zLyc/YFdj

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot5310184325:AAFI3fSQ6VcGu_NSTmv7d-qK2WCVhYY_qfg/sendMessage?chat_id=1293496579

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-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\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 1384 set thread context of 1072	1384	Dekont.PDF.exe	32
PID 1072 set thread context of 1728	1072	Dekont.PDF.exe	33

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1704	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1384	Dekont.PDF.exe
1384	Dekont.PDF.exe
1384	Dekont.PDF.exe
952	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1384	Dekont.PDF.exe
Token: SeDebugPrivilege	952	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1072	Dekont.PDF.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1384 wrote to memory of 952	1384	Dekont.PDF.exe	27
PID 1384 wrote to memory of 952	1384	Dekont.PDF.exe	27
PID 1384 wrote to memory of 952	1384	Dekont.PDF.exe	27
PID 1384 wrote to memory of 952	1384	Dekont.PDF.exe	27
PID 1384 wrote to memory of 1704	1384	Dekont.PDF.exe	29
PID 1384 wrote to memory of 1704	1384	Dekont.PDF.exe	29
PID 1384 wrote to memory of 1704	1384	Dekont.PDF.exe	29
PID 1384 wrote to memory of 1704	1384	Dekont.PDF.exe	29
PID 1384 wrote to memory of 820	1384	Dekont.PDF.exe	31
PID 1384 wrote to memory of 820	1384	Dekont.PDF.exe	31
PID 1384 wrote to memory of 820	1384	Dekont.PDF.exe	31
PID 1384 wrote to memory of 820	1384	Dekont.PDF.exe	31
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1384 wrote to memory of 1072	1384	Dekont.PDF.exe	32
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33
PID 1072 wrote to memory of 1728	1072	Dekont.PDF.exe	33

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\gPgpDcrGk.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:952
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gPgpDcrGk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9F6C.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1704
- C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe"
  2⤵
  PID:820
- C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1072
- - 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:1728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9F6C.tmp

Filesize
1KB

MD5
d78306655c92759ef83f2793a56abe59

SHA1
dfc4d7ea955e51d5e74c546655f52827a71f507c

SHA256
fc6766a1bf6d5f6cfc7b79bc4e7f409d0827bac8a77276179256265c5361823d

SHA512
ff4b306141f1baa7c64732b9549395cb6633fe1e2a00e646fc90c1accaf6689ecaeac80625b2adf972f802698dde6c29cb4b9ac3fe820b82f2441ebb1dacf554

Download Submit
memory/952-77-0x0000000074E50000-0x00000000753FB000-memory.dmp

Filesize
5.7MB

Download
memory/952-88-0x0000000074E50000-0x00000000753FB000-memory.dmp

Filesize
5.7MB

Download
memory/1072-64-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-89-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-76-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-67-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1072-69-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1384-58-0x00000000063B0000-0x000000000647A000-memory.dmp

Filesize
808KB

Download
memory/1384-63-0x000000000A9E0000-0x000000000AA54000-memory.dmp

Filesize
464KB

Download
memory/1384-54-0x0000000001370000-0x00000000014BC000-memory.dmp

Filesize
1.3MB

Download
memory/1384-57-0x0000000000610000-0x000000000061C000-memory.dmp

Filesize
48KB

Download
memory/1384-56-0x00000000005F0000-0x0000000000608000-memory.dmp

Filesize
96KB

Download
memory/1384-55-0x0000000076701000-0x0000000076703000-memory.dmp

Filesize
8KB

Download
memory/1728-83-0x0000000000270000-0x00000000002D6000-memory.dmp

Filesize
408KB

Download
memory/1728-85-0x0000000000270000-0x00000000002D6000-memory.dmp

Filesize
408KB

Download
memory/1728-87-0x0000000004CB0000-0x0000000004D6C000-memory.dmp

Filesize
752KB

Download
memory/1728-80-0x0000000000270000-0x00000000002D6000-memory.dmp

Filesize
408KB

Download
memory/1728-78-0x0000000000270000-0x00000000002D6000-memory.dmp

Filesize
408KB

Download