blustealer | 0e1a62a6d3c082384e1fe0957ac7fa8734c5a52e47c20717ca19c46681ed7c04

Analysis

max time kernel
147s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2023 01:54

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General

Target

3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe
Size

1.0MB
MD5

962b447996d774bd6b11a221ab39bd8f
SHA1

aae4d7117ce9f6c493ed6f7c4d41cbc7c4f805f6
SHA256

3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4
SHA512

23fbaf09f2e267883ed3e7db9c5f6f1512d2d2ca1ac097b23c3fb7183c7991e7c6b1397448ea996a1d24be6b16b3cc2a4b2d70fdb7c23249918d48923535df8e
SSDEEP

24576:8GFKCcW9RoTHfzW/ZOaXxLvppk/suw0kIrhDhq12N3nCAIQ9:8G8CcW9RoT/a/YahLR2/9Yeh220A

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot6120911772:AAEvnEDbWRlbIuD1NP8MtmiY3tQ46T9SQyo/sendMessage?chat_id=6082430866

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-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\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 4080 set thread context of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4212 set thread context of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105

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

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
2108	schtasks.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	60	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4588	powershell.exe
4588	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4588	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4080 wrote to memory of 4588	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	100
PID 4080 wrote to memory of 4588	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	100
PID 4080 wrote to memory of 4588	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	100
PID 4080 wrote to memory of 2108	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	102
PID 4080 wrote to memory of 2108	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	102
PID 4080 wrote to memory of 2108	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	102
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4080 wrote to memory of 4212	4080	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	104
PID 4212 wrote to memory of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105
PID 4212 wrote to memory of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105
PID 4212 wrote to memory of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105
PID 4212 wrote to memory of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105
PID 4212 wrote to memory of 2932	4212	3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe	105

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe
"C:\Users\Admin\AppData\Local\Temp\3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4080
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\RnylxoqUaifuRI.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4588
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RnylxoqUaifuRI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1577.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2108
- C:\Users\Admin\AppData\Local\Temp\3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe
  "C:\Users\Admin\AppData\Local\Temp\3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4212
- - 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:2932

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4jkdlqtp.bb4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1577.tmp

Filesize
1KB

MD5
25de81cfab9e2404d772eecca6197539

SHA1
4b9949eebf017c21e272100da84924dcdaa5b1c9

SHA256
2379d9dedaa03b892cf3cd117ed6964c1e0400ff1af62fda8b3b2af9d913f021

SHA512
642fb03407e0eaaecda67016c300096b7e237887e17a27ec9256fe85ece3864f6aebc62a61a66534a2885b39c58330c6fd2a25dd9476a54ebad9a6c09131d9b3

Download Submit
memory/2932-188-0x00000000008B0000-0x0000000000916000-memory.dmp

Filesize
408KB

Download
memory/2932-189-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/2932-193-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/2932-190-0x0000000005210000-0x0000000005220000-memory.dmp

Filesize
64KB

Download
memory/4080-133-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4080-141-0x0000000009620000-0x00000000096BC000-memory.dmp

Filesize
624KB

Download
memory/4080-137-0x00000000057D0000-0x00000000057E0000-memory.dmp

Filesize
64KB

Download
memory/4080-138-0x00000000056A0000-0x00000000056AA000-memory.dmp

Filesize
40KB

Download
memory/4080-139-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4080-135-0x0000000005C70000-0x0000000006214000-memory.dmp

Filesize
5.6MB

Download
memory/4080-136-0x00000000055E0000-0x0000000005672000-memory.dmp

Filesize
584KB

Download
memory/4080-140-0x00000000057D0000-0x00000000057E0000-memory.dmp

Filesize
64KB

Download
memory/4080-156-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4080-134-0x0000000000AE0000-0x0000000000BF2000-memory.dmp

Filesize
1.1MB

Download
memory/4212-202-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4212-151-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4212-154-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4588-155-0x0000000004C60000-0x0000000004C82000-memory.dmp

Filesize
136KB

Download
memory/4588-150-0x0000000004E10000-0x0000000005438000-memory.dmp

Filesize
6.2MB

Download
memory/4588-195-0x0000000007290000-0x000000000729E000-memory.dmp

Filesize
56KB

Download
memory/4588-157-0x0000000005630000-0x0000000005696000-memory.dmp

Filesize
408KB

Download
memory/4588-146-0x00000000023E0000-0x0000000002416000-memory.dmp

Filesize
216KB

Download
memory/4588-173-0x00000000062E0000-0x0000000006312000-memory.dmp

Filesize
200KB

Download
memory/4588-174-0x0000000070FB0000-0x0000000070FFC000-memory.dmp

Filesize
304KB

Download
memory/4588-184-0x0000000006350000-0x000000000636E000-memory.dmp

Filesize
120KB

Download
memory/4588-185-0x0000000007680000-0x0000000007CFA000-memory.dmp

Filesize
6.5MB

Download
memory/4588-186-0x0000000007040000-0x000000000705A000-memory.dmp

Filesize
104KB

Download
memory/4588-187-0x00000000070B0000-0x00000000070BA000-memory.dmp

Filesize
40KB

Download
memory/4588-171-0x0000000002430000-0x0000000002440000-memory.dmp

Filesize
64KB

Download
memory/4588-148-0x0000000002430000-0x0000000002440000-memory.dmp

Filesize
64KB

Download
memory/4588-147-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4588-192-0x00000000072C0000-0x0000000007356000-memory.dmp

Filesize
600KB

Download
memory/4588-172-0x000000007F090000-0x000000007F0A0000-memory.dmp

Filesize
64KB

Download
memory/4588-194-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4588-170-0x0000000005D20000-0x0000000005D3E000-memory.dmp

Filesize
120KB

Download
memory/4588-196-0x00000000073A0000-0x00000000073BA000-memory.dmp

Filesize
104KB

Download
memory/4588-197-0x0000000007380000-0x0000000007388000-memory.dmp

Filesize
32KB

Download
memory/4588-198-0x0000000002430000-0x0000000002440000-memory.dmp

Filesize
64KB

Download
memory/4588-201-0x00000000752B0000-0x0000000075A60000-memory.dmp

Filesize
7.7MB

Download
memory/4588-158-0x0000000005710000-0x0000000005776000-memory.dmp

Filesize
408KB

Download