blustealer | 87832eaabe18c374549cc586c2dca63c84ff0792e88a80e85f6e452f0b22cf06

Analysis

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

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
21-07-2023 11:37

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General

Target

87.exe
Size

1.2MB
MD5

c417498058dcc5982157432ff63d33e9
SHA1

a9909f37d3cef589e2086a5bb3dfc728596130f6
SHA256

87832eaabe18c374549cc586c2dca63c84ff0792e88a80e85f6e452f0b22cf06
SHA512

5e06e931c3e142aa0ec69452183a328595acb82009011e6bd702ccd2ed65bcfe075562a845e9f1aefadb74c2b731b3f84b684a116f1cf8bd20fd3b277d807844
SSDEEP

24576:pN6GEf47+UgcarQNkRq/mczfSrio0cXNf:D6hf47+OarDRgLfSF0iN

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-1-5-21-1722984668-1829624581-3022101259-1000\Control Panel\International\Geo\Nation	87.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2264 set thread context of 232	2264	87.exe	99
PID 232 set thread context of 4180	232	87.exe	100

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/Job

T1053

pid	Process
3948	schtasks.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	39	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
688	powershell.exe
688	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	688	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
232	87.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 688	2264	87.exe	95
PID 2264 wrote to memory of 688	2264	87.exe	95
PID 2264 wrote to memory of 688	2264	87.exe	95
PID 2264 wrote to memory of 3948	2264	87.exe	97
PID 2264 wrote to memory of 3948	2264	87.exe	97
PID 2264 wrote to memory of 3948	2264	87.exe	97
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 2264 wrote to memory of 232	2264	87.exe	99
PID 232 wrote to memory of 4180	232	87.exe	100
PID 232 wrote to memory of 4180	232	87.exe	100
PID 232 wrote to memory of 4180	232	87.exe	100
PID 232 wrote to memory of 4180	232	87.exe	100
PID 232 wrote to memory of 4180	232	87.exe	100

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\87.exe
"C:\Users\Admin\AppData\Local\Temp\87.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\XwWrHjBogFa.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:688
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XwWrHjBogFa" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFB19.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3948
- C:\Users\Admin\AppData\Local\Temp\87.exe
  "C:\Users\Admin\AppData\Local\Temp\87.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:232
- - 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:4180

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

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\__PSScriptPolicyTest_kdufdf1r.ssl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpFB19.tmp

Filesize
1KB

MD5
e356157a6c3beef1ef6bef1b32811c0a

SHA1
f3fede6dd3212b42f4ec46b92cb82c51aee66e07

SHA256
d4a1dc0877343861423c5c8b6a10582997ff89af1c53d7b6a9a83e11ba1619c4

SHA512
94b99f650b5df4b27b523fd96468463573977989dee88f7e2d6d13b6ec2f4631b618589e1cf61d11067c96f0819c44ba1c85b45073b864b1c7e8485bd62b51fd

Download Submit
memory/232-204-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/232-155-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/232-151-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/688-171-0x0000000006410000-0x000000000642E000-memory.dmp

Filesize
120KB

Download
memory/688-191-0x00000000077A0000-0x00000000077AA000-memory.dmp

Filesize
40KB

Download
memory/688-203-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/688-200-0x0000000007A70000-0x0000000007A78000-memory.dmp

Filesize
32KB

Download
memory/688-146-0x0000000002AE0000-0x0000000002B16000-memory.dmp

Filesize
216KB

Download
memory/688-199-0x0000000007A80000-0x0000000007A9A000-memory.dmp

Filesize
104KB

Download
memory/688-148-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/688-150-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/688-149-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/688-152-0x0000000005750000-0x0000000005D78000-memory.dmp

Filesize
6.2MB

Download
memory/688-198-0x0000000007980000-0x000000000798E000-memory.dmp

Filesize
56KB

Download
memory/688-197-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/688-196-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/688-159-0x0000000005450000-0x0000000005472000-memory.dmp

Filesize
136KB

Download
memory/688-160-0x0000000005570000-0x00000000055D6000-memory.dmp

Filesize
408KB

Download
memory/688-166-0x0000000005DF0000-0x0000000005E56000-memory.dmp

Filesize
408KB

Download
memory/688-195-0x00000000079B0000-0x0000000007A46000-memory.dmp

Filesize
600KB

Download
memory/688-194-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/688-172-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/688-173-0x000000007FD50000-0x000000007FD60000-memory.dmp

Filesize
64KB

Download
memory/688-174-0x00000000073F0000-0x0000000007422000-memory.dmp

Filesize
200KB

Download
memory/688-175-0x00000000719F0000-0x0000000071A3C000-memory.dmp

Filesize
304KB

Download
memory/688-185-0x00000000069C0000-0x00000000069DE000-memory.dmp

Filesize
120KB

Download
memory/688-187-0x0000000007D70000-0x00000000083EA000-memory.dmp

Filesize
6.5MB

Download
memory/688-188-0x0000000007730000-0x000000000774A000-memory.dmp

Filesize
104KB

Download
memory/2264-135-0x0000000005880000-0x0000000005E24000-memory.dmp

Filesize
5.6MB

Download
memory/2264-136-0x0000000005370000-0x0000000005402000-memory.dmp

Filesize
584KB

Download
memory/2264-134-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-139-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-156-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-133-0x00000000007E0000-0x000000000091E000-memory.dmp

Filesize
1.2MB

Download
memory/2264-140-0x00000000054D0000-0x00000000054E0000-memory.dmp

Filesize
64KB

Download
memory/2264-141-0x0000000009380000-0x000000000941C000-memory.dmp

Filesize
624KB

Download
memory/2264-138-0x0000000005310000-0x000000000531A000-memory.dmp

Filesize
40KB

Download
memory/2264-137-0x00000000054D0000-0x00000000054E0000-memory.dmp

Filesize
64KB

Download
memory/4180-193-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4180-186-0x0000000000B00000-0x0000000000B66000-memory.dmp

Filesize
408KB

Download
memory/4180-189-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4180-190-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download