blustealer | c75c9aa6a59390063715c53c31d399ee5da8d2e03dd7abaae9e369d4b4e5354c

General

Target

DEKONT_P.EXE.exe
Size

1.3MB
MD5

37b87a3acbb3e3926f6bd65a86fec7fc
SHA1

73f0ffd7fabe1e02f25b3cae3fa1c0b92235c33c
SHA256

c75c9aa6a59390063715c53c31d399ee5da8d2e03dd7abaae9e369d4b4e5354c
SHA512

2aa63a46e09a698ebe6d5b8bf0f61f016259813a576d1038ed0b34b40b9ee552b88b34a4940f7a16692c604afe06c95c0a892e28bfb66a0a71a9db76f2209f19
SSDEEP

24576:IYPxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNussjBuIUJ:yjUMOrbugDNySH3DN6Fdj

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	DEKONT_P.EXE.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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 2272 set thread context of 5024	2272	DEKONT_P.EXE.exe	93
PID 5024 set thread context of 4972	5024	DEKONT_P.EXE.exe	96

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
1120	schtasks.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	43	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2272	DEKONT_P.EXE.exe
2016	powershell.exe
2272	DEKONT_P.EXE.exe
2016	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	DEKONT_P.EXE.exe
Token: SeDebugPrivilege	2016	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5024	DEKONT_P.EXE.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 2016	2272	DEKONT_P.EXE.exe	89
PID 2272 wrote to memory of 2016	2272	DEKONT_P.EXE.exe	89
PID 2272 wrote to memory of 2016	2272	DEKONT_P.EXE.exe	89
PID 2272 wrote to memory of 1120	2272	DEKONT_P.EXE.exe	91
PID 2272 wrote to memory of 1120	2272	DEKONT_P.EXE.exe	91
PID 2272 wrote to memory of 1120	2272	DEKONT_P.EXE.exe	91
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 2272 wrote to memory of 5024	2272	DEKONT_P.EXE.exe	93
PID 5024 wrote to memory of 4972	5024	DEKONT_P.EXE.exe	96
PID 5024 wrote to memory of 4972	5024	DEKONT_P.EXE.exe	96
PID 5024 wrote to memory of 4972	5024	DEKONT_P.EXE.exe	96
PID 5024 wrote to memory of 4972	5024	DEKONT_P.EXE.exe	96
PID 5024 wrote to memory of 4972	5024	DEKONT_P.EXE.exe	96

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\DEKONT_P.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\DEKONT_P.EXE.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\XcEQoBlokDImwz.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2016
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XcEQoBlokDImwz" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1DD8.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1120
- C:\Users\Admin\AppData\Local\Temp\DEKONT_P.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\DEKONT_P.EXE.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5024
- - 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:4972

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\tmp1DD8.tmp

Filesize
1KB

MD5
d86380d751a3bacd69794bda05602b22

SHA1
f82712bff1235e5103dede1889b11f045d7977e7

SHA256
75b5d362119e196e08c1f29cbf4fb9afa652921228c1709200e0392d01094731

SHA512
327857e6d592ab5be3ca611bab5e08f870d78d380a483dae13dbb9ed6d165bb9402bedd5e616f219bd783eb22a3583b8b22e4350807611881898a10402a5dfda

Download Submit
memory/2016-156-0x0000000008030000-0x00000000086AA000-memory.dmp

Filesize
6.5MB

Download
memory/2016-151-0x00000000066D0000-0x00000000066EE000-memory.dmp

Filesize
120KB

Download
memory/2016-164-0x0000000007D00000-0x0000000007D08000-memory.dmp

Filesize
32KB

Download
memory/2016-163-0x0000000007D20000-0x0000000007D3A000-memory.dmp

Filesize
104KB

Download
memory/2016-162-0x0000000007C10000-0x0000000007C1E000-memory.dmp

Filesize
56KB

Download
memory/2016-140-0x0000000002DC0000-0x0000000002DF6000-memory.dmp

Filesize
216KB

Download
memory/2016-161-0x0000000007C60000-0x0000000007CF6000-memory.dmp

Filesize
600KB

Download
memory/2016-142-0x0000000005870000-0x0000000005E98000-memory.dmp

Filesize
6.2MB

Download
memory/2016-143-0x0000000005710000-0x0000000005732000-memory.dmp

Filesize
136KB

Download
memory/2016-144-0x0000000005F10000-0x0000000005F76000-memory.dmp

Filesize
408KB

Download
memory/2016-153-0x0000000006C90000-0x0000000006CC2000-memory.dmp

Filesize
200KB

Download
memory/2016-160-0x0000000007A50000-0x0000000007A5A000-memory.dmp

Filesize
40KB

Download
memory/2016-157-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/2016-155-0x0000000006D00000-0x0000000006D1E000-memory.dmp

Filesize
120KB

Download
memory/2016-154-0x0000000071120000-0x000000007116C000-memory.dmp

Filesize
304KB

Download
memory/2272-134-0x0000000004E10000-0x0000000004EA2000-memory.dmp

Filesize
584KB

Download
memory/2272-135-0x0000000004DC0000-0x0000000004DCA000-memory.dmp

Filesize
40KB

Download
memory/2272-136-0x000000000BA50000-0x000000000BAEC000-memory.dmp

Filesize
624KB

Download
memory/2272-132-0x0000000000420000-0x000000000056C000-memory.dmp

Filesize
1.3MB

Download
memory/2272-137-0x000000000BD10000-0x000000000BD76000-memory.dmp

Filesize
408KB

Download
memory/2272-133-0x00000000053C0000-0x0000000005964000-memory.dmp

Filesize
5.6MB

Download
memory/4972-159-0x0000000000A00000-0x0000000000A66000-memory.dmp

Filesize
408KB

Download
memory/5024-146-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/5024-152-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/5024-148-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/5024-165-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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