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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	Dekont.PDF.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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 1792 set thread context of 4784	1792	Dekont.PDF.exe	97
PID 4784 set thread context of 4640	4784	Dekont.PDF.exe	98

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
3540	schtasks.exe

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	38	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1792	Dekont.PDF.exe
2156	powershell.exe
1792	Dekont.PDF.exe
1792	Dekont.PDF.exe
1792	Dekont.PDF.exe
2156	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1792	Dekont.PDF.exe
Token: SeDebugPrivilege	2156	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4784	Dekont.PDF.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2156	1792	Dekont.PDF.exe	92
PID 1792 wrote to memory of 2156	1792	Dekont.PDF.exe	92
PID 1792 wrote to memory of 2156	1792	Dekont.PDF.exe	92
PID 1792 wrote to memory of 3540	1792	Dekont.PDF.exe	94
PID 1792 wrote to memory of 3540	1792	Dekont.PDF.exe	94
PID 1792 wrote to memory of 3540	1792	Dekont.PDF.exe	94
PID 1792 wrote to memory of 4700	1792	Dekont.PDF.exe	96
PID 1792 wrote to memory of 4700	1792	Dekont.PDF.exe	96
PID 1792 wrote to memory of 4700	1792	Dekont.PDF.exe	96
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 1792 wrote to memory of 4784	1792	Dekont.PDF.exe	97
PID 4784 wrote to memory of 4640	4784	Dekont.PDF.exe	98
PID 4784 wrote to memory of 4640	4784	Dekont.PDF.exe	98
PID 4784 wrote to memory of 4640	4784	Dekont.PDF.exe	98
PID 4784 wrote to memory of 4640	4784	Dekont.PDF.exe	98
PID 4784 wrote to memory of 4640	4784	Dekont.PDF.exe	98

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1792
- 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:2156
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gPgpDcrGk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp666B.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3540
- C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\Dekont.PDF.exe"
  2⤵
  PID:4700
- 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:4784
- - 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:4640

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp666B.tmp

Filesize
1KB

MD5
07f52e07bc9de82446beca23cf14599f

SHA1
9687d522950bbbabe740265f4643bc31950142ba

SHA256
99b1fbf0fd3b2ee15e5c135c6a71d84058b11993f3a6c0f28fa77c0849ad6a47

SHA512
5bd2d3c3ad327c7f36633c526be6cec5b611367bb96f3032c4d845cb9cbdc807680bff7c87d6ba9cfbae1a2f46758e1ca17e040bf195fb64e6dad82fafca2c15

Download Submit
memory/1792-133-0x0000000005320000-0x00000000058C4000-memory.dmp

Filesize
5.6MB

Download
memory/1792-134-0x0000000004D70000-0x0000000004E02000-memory.dmp

Filesize
584KB

Download
memory/1792-135-0x0000000004E20000-0x0000000004E2A000-memory.dmp

Filesize
40KB

Download
memory/1792-136-0x000000000BAE0000-0x000000000BB7C000-memory.dmp

Filesize
624KB

Download
memory/1792-137-0x000000000BA50000-0x000000000BAB6000-memory.dmp

Filesize
408KB

Download
memory/1792-132-0x0000000000270000-0x00000000003BC000-memory.dmp

Filesize
1.3MB

Download
memory/2156-159-0x0000000007B90000-0x0000000007B9A000-memory.dmp

Filesize
40KB

Download
memory/2156-161-0x0000000007D50000-0x0000000007D5E000-memory.dmp

Filesize
56KB

Download
memory/2156-163-0x0000000007E40000-0x0000000007E48000-memory.dmp

Filesize
32KB

Download
memory/2156-142-0x0000000005A30000-0x0000000006058000-memory.dmp

Filesize
6.2MB

Download
memory/2156-143-0x0000000005850000-0x0000000005872000-memory.dmp

Filesize
136KB

Download
memory/2156-145-0x0000000006060000-0x00000000060C6000-memory.dmp

Filesize
408KB

Download
memory/2156-162-0x0000000007E60000-0x0000000007E7A000-memory.dmp

Filesize
104KB

Download
memory/2156-140-0x0000000002F00000-0x0000000002F36000-memory.dmp

Filesize
216KB

Download
memory/2156-160-0x0000000007DA0000-0x0000000007E36000-memory.dmp

Filesize
600KB

Download
memory/2156-158-0x0000000007B20000-0x0000000007B3A000-memory.dmp

Filesize
104KB

Download
memory/2156-153-0x0000000006820000-0x000000000683E000-memory.dmp

Filesize
120KB

Download
memory/2156-154-0x00000000079E0000-0x0000000007A12000-memory.dmp

Filesize
200KB

Download
memory/2156-155-0x0000000071460000-0x00000000714AC000-memory.dmp

Filesize
304KB

Download
memory/2156-156-0x0000000006DC0000-0x0000000006DDE000-memory.dmp

Filesize
120KB

Download
memory/2156-157-0x0000000008170000-0x00000000087EA000-memory.dmp

Filesize
6.5MB

Download
memory/4640-166-0x0000000000980000-0x00000000009E6000-memory.dmp

Filesize
408KB

Download
memory/4784-152-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4784-149-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4784-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4784-164-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads