blustealer | 797ed9f4cabf70bcf98dbc50235bfacd785ca91a747febc965c92465a3d53283

Analysis

max time kernel
143s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
18-10-2022 15:52

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General

Target

PROFORMA.EXE.exe
Size

1.3MB
MD5

fc5ab0fbd99f07685a8dc7701627f214
SHA1

e80e5a3d1450748736f035a7ee7856a4aacfeed9
SHA256

797ed9f4cabf70bcf98dbc50235bfacd785ca91a747febc965c92465a3d53283
SHA512

9f02188f31952a888f52c498d5ef23b1f35098e37d56cf65c26be5f91d2acf48315c8f5fa378bb5e7045e6a68e63812762beeca5736aba2099fb2a9983704e90
SSDEEP

24576:2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNussjTkuAHGe:VAm0THYewFdj

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	PROFORMA.EXE.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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 4632 set thread context of 4400	4632	PROFORMA.EXE.exe	98
PID 4400 set thread context of 3044	4400	PROFORMA.EXE.exe	99

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
3596	schtasks.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	37	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4632	PROFORMA.EXE.exe
4476	powershell.exe
4632	PROFORMA.EXE.exe
4476	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4632	PROFORMA.EXE.exe
Token: SeDebugPrivilege	4476	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4400	PROFORMA.EXE.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 4476	4632	PROFORMA.EXE.exe	91
PID 4632 wrote to memory of 4476	4632	PROFORMA.EXE.exe	91
PID 4632 wrote to memory of 4476	4632	PROFORMA.EXE.exe	91
PID 4632 wrote to memory of 3596	4632	PROFORMA.EXE.exe	93
PID 4632 wrote to memory of 3596	4632	PROFORMA.EXE.exe	93
PID 4632 wrote to memory of 3596	4632	PROFORMA.EXE.exe	93
PID 4632 wrote to memory of 4800	4632	PROFORMA.EXE.exe	95
PID 4632 wrote to memory of 4800	4632	PROFORMA.EXE.exe	95
PID 4632 wrote to memory of 4800	4632	PROFORMA.EXE.exe	95
PID 4632 wrote to memory of 5036	4632	PROFORMA.EXE.exe	97
PID 4632 wrote to memory of 5036	4632	PROFORMA.EXE.exe	97
PID 4632 wrote to memory of 5036	4632	PROFORMA.EXE.exe	97
PID 4632 wrote to memory of 1488	4632	PROFORMA.EXE.exe	96
PID 4632 wrote to memory of 1488	4632	PROFORMA.EXE.exe	96
PID 4632 wrote to memory of 1488	4632	PROFORMA.EXE.exe	96
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4632 wrote to memory of 4400	4632	PROFORMA.EXE.exe	98
PID 4400 wrote to memory of 3044	4400	PROFORMA.EXE.exe	99
PID 4400 wrote to memory of 3044	4400	PROFORMA.EXE.exe	99
PID 4400 wrote to memory of 3044	4400	PROFORMA.EXE.exe	99
PID 4400 wrote to memory of 3044	4400	PROFORMA.EXE.exe	99
PID 4400 wrote to memory of 3044	4400	PROFORMA.EXE.exe	99

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WXtEQNGzoNewfR.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4476
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WXtEQNGzoNewfR" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB6A.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3596
- C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe"
  2⤵
  PID:4800
- C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe"
  2⤵
  PID:1488
- C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe"
  2⤵
  PID:5036
- C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\PROFORMA.EXE.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4400
- - 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:3044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB6A.tmp

Filesize
1KB

MD5
32dc15045f2baa94dac3e06656369d98

SHA1
66e627cff8fb4917ec8a8cdf19dff5949ee29c9f

SHA256
0aac50863fb4528a7276041978b129edbcbf63f88397319d64593ff26276525f

SHA512
18209621ceefcfd42025e8bbcb5105ce83b029efe37ffe1c7d33c228973796d4a8ffd19f220c89340631cd5da05a33ffec251a50a32daf41e8fb541591b64d85

Download Submit
memory/3044-160-0x0000000000D00000-0x0000000000D66000-memory.dmp

Filesize
408KB

Download
memory/4400-168-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4400-154-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4400-151-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4400-147-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4476-149-0x0000000005A50000-0x0000000005A72000-memory.dmp

Filesize
136KB

Download
memory/4476-150-0x0000000006160000-0x00000000061C6000-memory.dmp

Filesize
408KB

Download
memory/4476-167-0x0000000007FA0000-0x0000000007FA8000-memory.dmp

Filesize
32KB

Download
memory/4476-142-0x0000000005B30000-0x0000000006158000-memory.dmp

Filesize
6.2MB

Download
memory/4476-140-0x0000000005350000-0x0000000005386000-memory.dmp

Filesize
216KB

Download
memory/4476-166-0x0000000007FC0000-0x0000000007FDA000-memory.dmp

Filesize
104KB

Download
memory/4476-162-0x0000000007C80000-0x0000000007C9A000-memory.dmp

Filesize
104KB

Download
memory/4476-165-0x0000000007EB0000-0x0000000007EBE000-memory.dmp

Filesize
56KB

Download
memory/4476-164-0x0000000007F00000-0x0000000007F96000-memory.dmp

Filesize
600KB

Download
memory/4476-155-0x0000000006980000-0x000000000699E000-memory.dmp

Filesize
120KB

Download
memory/4476-156-0x0000000006F40000-0x0000000006F72000-memory.dmp

Filesize
200KB

Download
memory/4476-157-0x0000000071A80000-0x0000000071ACC000-memory.dmp

Filesize
304KB

Download
memory/4476-158-0x0000000006F20000-0x0000000006F3E000-memory.dmp

Filesize
120KB

Download
memory/4476-161-0x00000000082C0000-0x000000000893A000-memory.dmp

Filesize
6.5MB

Download
memory/4476-163-0x0000000007CF0000-0x0000000007CFA000-memory.dmp

Filesize
40KB

Download
memory/4632-132-0x00000000003A0000-0x00000000004FA000-memory.dmp

Filesize
1.4MB

Download
memory/4632-134-0x0000000004E70000-0x0000000004F02000-memory.dmp

Filesize
584KB

Download
memory/4632-135-0x0000000004F20000-0x0000000004F2A000-memory.dmp

Filesize
40KB

Download
memory/4632-136-0x000000000BB20000-0x000000000BBBC000-memory.dmp

Filesize
624KB

Download
memory/4632-137-0x000000000BE00000-0x000000000BE66000-memory.dmp

Filesize
408KB

Download
memory/4632-133-0x00000000054F0000-0x0000000005A94000-memory.dmp

Filesize
5.6MB

Download