blustealer | 33f6177e2d98b8b7a93daed5f05883a111f706ed3bcba925c9740c4feac6111e

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

C2

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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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 1884 set thread context of 704	1884	Dekont.PDF.exe	31
PID 704 set thread context of 1756	704	Dekont.PDF.exe	32

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
2016	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1884	Dekont.PDF.exe
1884	Dekont.PDF.exe
1640	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1884	Dekont.PDF.exe
Token: SeDebugPrivilege	1640	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
704	Dekont.PDF.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1884 wrote to memory of 1640	1884	Dekont.PDF.exe	27
PID 1884 wrote to memory of 1640	1884	Dekont.PDF.exe	27
PID 1884 wrote to memory of 1640	1884	Dekont.PDF.exe	27
PID 1884 wrote to memory of 1640	1884	Dekont.PDF.exe	27
PID 1884 wrote to memory of 2016	1884	Dekont.PDF.exe	28
PID 1884 wrote to memory of 2016	1884	Dekont.PDF.exe	28
PID 1884 wrote to memory of 2016	1884	Dekont.PDF.exe	28
PID 1884 wrote to memory of 2016	1884	Dekont.PDF.exe	28
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 1884 wrote to memory of 704	1884	Dekont.PDF.exe	31
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32
PID 704 wrote to memory of 1756	704	Dekont.PDF.exe	32

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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:1884
- 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:1640
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gPgpDcrGk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB74F.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2016
- 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:704
- - 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:1756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB74F.tmp

Filesize
1KB

MD5
ad3976be518ecd82d41a9666ef89cb4c

SHA1
01bb37d4f0540440cc84ab00bb933eee7baae5b6

SHA256
3cbc2cdb87be11698d3e134152e61c60b4c3d984039c3e6413d34e2240e9d7c5

SHA512
df86848d965ab69aabf7ef4060d2f723b046b22216ccc16fdf2605f9328aa4a27c8b7ed3297fb1027c434303d953921851754e163fa990c6c3b409554c0cdcfd

Download Submit
memory/704-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-89-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-88-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-64-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-67-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/704-69-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1640-86-0x000000006E230000-0x000000006E7DB000-memory.dmp

Filesize
5.7MB

Download
memory/1640-76-0x000000006E230000-0x000000006E7DB000-memory.dmp

Filesize
5.7MB

Download
memory/1756-77-0x00000000000E0000-0x0000000000146000-memory.dmp

Filesize
408KB

Download
memory/1756-79-0x00000000000E0000-0x0000000000146000-memory.dmp

Filesize
408KB

Download
memory/1756-84-0x00000000000E0000-0x0000000000146000-memory.dmp

Filesize
408KB

Download
memory/1756-82-0x00000000000E0000-0x0000000000146000-memory.dmp

Filesize
408KB

Download
memory/1756-87-0x0000000000FB0000-0x000000000106C000-memory.dmp

Filesize
752KB

Download
memory/1884-63-0x0000000004D80000-0x0000000004DF4000-memory.dmp

Filesize
464KB

Download
memory/1884-58-0x000000000A7E0000-0x000000000A8AA000-memory.dmp

Filesize
808KB

Download
memory/1884-54-0x0000000001140000-0x000000000128C000-memory.dmp

Filesize
1.3MB

Download
memory/1884-57-0x0000000000660000-0x000000000066C000-memory.dmp

Filesize
48KB

Download
memory/1884-56-0x00000000005B0000-0x00000000005C8000-memory.dmp

Filesize
96KB

Download
memory/1884-55-0x0000000075571000-0x0000000075573000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads