blustealer | 8908acf28585acbad787f5b1fc7b53b99ca8fb7d03ef05cdb6cd436102fd82cc

General

Target

Dekont.PDF.exe
Size

1.3MB
MD5

8feabe088c948dc8f387c098e6840ed4
SHA1

52522a7e7bae6061fc3b32ec3a25af902f164af8
SHA256

8908acf28585acbad787f5b1fc7b53b99ca8fb7d03ef05cdb6cd436102fd82cc
SHA512

593af500334afd603b4ab82d315362123000a078772a5f1f5dd5eb29aae39606eb87ef96cb9915bb243365c851de54646ffd81eff666b4277144184c008bef01
SSDEEP

24576:br3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNussBq5fr+:0qhrk1QmY9OrXS76Fdj

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 1048 set thread context of 1936	1048	Dekont.PDF.exe	31
PID 1936 set thread context of 872	1936	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
1344	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1048	Dekont.PDF.exe
1048	Dekont.PDF.exe
1424	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1048	Dekont.PDF.exe
Token: SeDebugPrivilege	1424	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1936	Dekont.PDF.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 1424	1048	Dekont.PDF.exe	27
PID 1048 wrote to memory of 1424	1048	Dekont.PDF.exe	27
PID 1048 wrote to memory of 1424	1048	Dekont.PDF.exe	27
PID 1048 wrote to memory of 1424	1048	Dekont.PDF.exe	27
PID 1048 wrote to memory of 1344	1048	Dekont.PDF.exe	29
PID 1048 wrote to memory of 1344	1048	Dekont.PDF.exe	29
PID 1048 wrote to memory of 1344	1048	Dekont.PDF.exe	29
PID 1048 wrote to memory of 1344	1048	Dekont.PDF.exe	29
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1048 wrote to memory of 1936	1048	Dekont.PDF.exe	31
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	Dekont.PDF.exe	32
PID 1936 wrote to memory of 872	1936	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:1048
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GuYxLKsycrfSBi.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1424
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GuYxLKsycrfSBi" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAEB7.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1344
- 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:1936
- - 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:872

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\tmpAEB7.tmp

Filesize
1KB

MD5
df5b9e5d095db2b0c1e8ab07218dd6ff

SHA1
d85b421f6d489d7a34faee2b57f6586bff8e77fc

SHA256
b8189c4e4fa9bf5fcd452382cdc4bdc5046ae22238bab0263f8434a53b04a9e4

SHA512
41e355cda46b8630d82c6df5b36e797fbf1612f870c921cdc15ea06669231863b3c1f5359823bdb9887ef53da2206b3121aefa5cb86c298a380eb6867068aa95

Download Submit
memory/872-78-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/872-76-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/872-81-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/872-87-0x0000000000A10000-0x0000000000ACC000-memory.dmp

Filesize
752KB

Download
memory/872-83-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1048-57-0x0000000000600000-0x000000000060C000-memory.dmp

Filesize
48KB

Download
memory/1048-63-0x000000000A860000-0x000000000A8D4000-memory.dmp

Filesize
464KB

Download
memory/1048-54-0x0000000001160000-0x00000000012AC000-memory.dmp

Filesize
1.3MB

Download
memory/1048-58-0x000000000A790000-0x000000000A85A000-memory.dmp

Filesize
808KB

Download
memory/1048-56-0x0000000000650000-0x0000000000668000-memory.dmp

Filesize
96KB

Download
memory/1048-55-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/1424-86-0x000000006EEF0000-0x000000006F49B000-memory.dmp

Filesize
5.7MB

Download
memory/1424-88-0x000000006EEF0000-0x000000006F49B000-memory.dmp

Filesize
5.7MB

Download
memory/1936-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-69-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-67-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-64-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-85-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1936-89-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads