blustealer | d50e53128afae84f81f41fce22e7ce3f13442485d7c7ce3bb1417afaba6c9c05

General

Target

DETAILS AND INVOICES.exe
Size

2.4MB
MD5

888a18230e69a8ba0c420042bcb6e758
SHA1

0b0dcb23577efc327acdd2ff052bb3d54693d715
SHA256

d50e53128afae84f81f41fce22e7ce3f13442485d7c7ce3bb1417afaba6c9c05
SHA512

d20488366904fda6dccb6a92c4ad0bfc74d2c74702e2f4cadef197cdf1e3f37cd39f3b35a8df9bfc8d3f9a71bfb4fefa6adf0b5f4b8f4cf8eb017367847fd3cc
SSDEEP

24576:sE9iqdFA3SA2PWRLxlTP0q0prBMsOZORHJd5SbyBRJ4y4c2TsdZh8FzxZ+hLAwKu:79vgIWRbb0RtYQBXhcOatvd4oS

Score

10^/10

blustealer collection persistence spyware stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5813496253:AAF4hamIx4-mNmFF1DwsqdJ4F9vUBmFqLo/sendMessage?chat_id=1105271645

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-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	DETAILS AND INVOICES.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Oxpurhx = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ekoclg\\Oxpurhx.exe\""	DETAILS AND INVOICES.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4520 set thread context of 3312	4520	DETAILS AND INVOICES.exe	97
PID 3312 set thread context of 4988	3312	DETAILS AND INVOICES.exe	99

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

System Information Discovery
T1082

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	36	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2432	powershell.exe
2432	powershell.exe
4520	DETAILS AND INVOICES.exe
4520	DETAILS AND INVOICES.exe
4520	DETAILS AND INVOICES.exe
4520	DETAILS AND INVOICES.exe
4520	DETAILS AND INVOICES.exe
4520	DETAILS AND INVOICES.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	powershell.exe
Token: SeDebugPrivilege	4520	DETAILS AND INVOICES.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3312	DETAILS AND INVOICES.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 2432	4520	DETAILS AND INVOICES.exe	86
PID 4520 wrote to memory of 2432	4520	DETAILS AND INVOICES.exe	86
PID 4520 wrote to memory of 2432	4520	DETAILS AND INVOICES.exe	86
PID 4520 wrote to memory of 5020	4520	DETAILS AND INVOICES.exe	94
PID 4520 wrote to memory of 5020	4520	DETAILS AND INVOICES.exe	94
PID 4520 wrote to memory of 5020	4520	DETAILS AND INVOICES.exe	94
PID 4520 wrote to memory of 2512	4520	DETAILS AND INVOICES.exe	95
PID 4520 wrote to memory of 2512	4520	DETAILS AND INVOICES.exe	95
PID 4520 wrote to memory of 2512	4520	DETAILS AND INVOICES.exe	95
PID 4520 wrote to memory of 4916	4520	DETAILS AND INVOICES.exe	96
PID 4520 wrote to memory of 4916	4520	DETAILS AND INVOICES.exe	96
PID 4520 wrote to memory of 4916	4520	DETAILS AND INVOICES.exe	96
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 4520 wrote to memory of 3312	4520	DETAILS AND INVOICES.exe	97
PID 3312 wrote to memory of 4988	3312	DETAILS AND INVOICES.exe	99
PID 3312 wrote to memory of 4988	3312	DETAILS AND INVOICES.exe	99
PID 3312 wrote to memory of 4988	3312	DETAILS AND INVOICES.exe	99
PID 3312 wrote to memory of 4988	3312	DETAILS AND INVOICES.exe	99
PID 3312 wrote to memory of 4988	3312	DETAILS AND INVOICES.exe	99

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe
"C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2432
- C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe
  "C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe"
  2⤵
  PID:5020
- C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe
  "C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe"
  2⤵
  PID:2512
- C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe
  "C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe"
  2⤵
  PID:4916
- C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe
  "C:\Users\Admin\AppData\Local\Temp\DETAILS AND INVOICES.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3312
- - 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:4988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jkaa3fqp.bqr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2432-153-0x0000000006520000-0x000000000653A000-memory.dmp

Filesize
104KB

Download
memory/2432-151-0x0000000005EC0000-0x0000000005EDE000-memory.dmp

Filesize
120KB

Download
memory/2432-136-0x0000000002A10000-0x0000000002A46000-memory.dmp

Filesize
216KB

Download
memory/2432-137-0x0000000005300000-0x0000000005928000-memory.dmp

Filesize
6.2MB

Download
memory/2432-138-0x0000000005290000-0x00000000052F6000-memory.dmp

Filesize
408KB

Download
memory/2432-139-0x0000000005930000-0x0000000005996000-memory.dmp

Filesize
408KB

Download
memory/2432-152-0x00000000076B0000-0x0000000007D2A000-memory.dmp

Filesize
6.5MB

Download
memory/2432-149-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/2432-150-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/2432-158-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/2432-157-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/2432-154-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/2432-156-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/3312-166-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3312-169-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3312-174-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3312-163-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4520-134-0x0000000005030000-0x0000000005052000-memory.dmp

Filesize
136KB

Download
memory/4520-155-0x0000000004C90000-0x0000000004CA0000-memory.dmp

Filesize
64KB

Download
memory/4520-133-0x0000000000070000-0x00000000002D6000-memory.dmp

Filesize
2.4MB

Download
memory/4520-135-0x0000000004C90000-0x0000000004CA0000-memory.dmp

Filesize
64KB

Download
memory/4988-171-0x00000000059F0000-0x0000000005A8C000-memory.dmp

Filesize
624KB

Download
memory/4988-170-0x0000000001300000-0x0000000001366000-memory.dmp

Filesize
408KB

Download
memory/4988-172-0x00000000059E0000-0x00000000059F0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing