blustealer | 35c689f6d9ff3382b9fbd46bcd79037983c2582f75b50ec19dc86f1db09fda89

General

Target

90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
Size

1.5MB
MD5

e2b30c0c90faeeb878ed21be152d2dc1
SHA1

b64e8bbd7d23f9585a7ff9b24a61a7ab119f1769
SHA256

90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f
SHA512

7126633aeaeaa91f08d5c0dce6129bfb7501287cad6ac106f1c64c2ab0cb010d3b870680047ea3e9dffdb3bfccab2a9d2a11f8057dd302dfaf140b34022bd74f
SSDEEP

24576:PnQ3GQdfKrh2G8uraReOgX1yFQ+5irxTCQJ5xvCwUXZMnKfJIxzN5b2K:P9QdIuWed+sKK+CQ5CwMZMnx0

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5797428905:AAGaRRXGZN1d9GGFd3sE5x4uSpCGF0PU4m4/sendMessage?chat_id=1251788325

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Executes dropped EXE 6 IoCs

pid	Process
2952	alg.exe
2616	DiagnosticsHub.StandardCollector.Service.exe
4944	fxssvc.exe
664	elevation_service.exe
4940	elevation_service.exe
2800	maintenanceservice.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Windows\system32\fxssvc.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Windows\System32\msdtc.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Windows\System32\alg.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Windows\system32\AppVClient.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Roaming\916dddb850d0d086.bin	alg.exe
File opened for modification	C:\Windows\system32\dllhost.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1216 set thread context of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 3640 set thread context of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@fxsresm.dll,-1132 = "Store in a folder"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@fxsresm.dll,-1133 = "Print"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@fxsresm.dll,-1130 = "Microsoft Modem Device Provider"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@fxsresm.dll,-1134 = "Microsoft Routing Extension"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@fxsresm.dll,-1131 = "Route through e-mail"	fxssvc.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	78	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
656	Process not Found
656	Process not Found

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
Token: SeTakeOwnershipPrivilege	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
Token: SeAuditPrivilege	4944	fxssvc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 1156	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	86
PID 1216 wrote to memory of 1156	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	86
PID 1216 wrote to memory of 1156	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	86
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 1216 wrote to memory of 3640	1216	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	87
PID 3640 wrote to memory of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92
PID 3640 wrote to memory of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92
PID 3640 wrote to memory of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92
PID 3640 wrote to memory of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92
PID 3640 wrote to memory of 2992	3640	90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
"C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1216
- C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
  "C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe"
  2⤵
  PID:1156
- C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe
  "C:\Users\Admin\AppData\Local\Temp\90382d070f58dd0a9f21d05327c2589116e2271e2cce2cce69018e1f4d836c0f.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3640
- - 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:2992

C:\Windows\System32\alg.exe
C:\Windows\System32\alg.exe
1⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:2952

C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe
C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe
1⤵
- Executes dropped EXE
PID:2616

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p -s TapiSrv
1⤵
PID:1604

C:\Windows\system32\fxssvc.exe
C:\Windows\system32\fxssvc.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:4944

C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
1⤵
- Executes dropped EXE
PID:664

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe"
1⤵
- Executes dropped EXE
PID:4940

C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
"C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
1⤵
- Executes dropped EXE
PID:2800

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe

Filesize
2.1MB

MD5
0da9d2bac2dcd332aef6f2954f5f81e8

SHA1
d653450f28a4adf253c2a87eb2a0eb626719f7a2

SHA256
f1027f7043bcb0af319a7e9a66de23d38db3244aacf87e33511c72a7fa20f6ef

SHA512
9f8747bed40118018a3a1ed63ca72e1f556d69453f52ba78f988e77ae60d35ffb778feb2b2c382320a875f50c8d62a186cb6b71c7be59635feff963e7df03a20

Download Submit
C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe

Filesize
1.4MB

MD5
f844d597da3ea55ef83be7d0458baa6a

SHA1
e2845e82e0974158eb01824e12350151b0b53411

SHA256
93e8712af0e8b3f9b6e61f289c373562ea894884034ba6f8f42d49eef9a10c52

SHA512
a49f0efeef3730e624139b835fd4b818cd74c33ede65d700edb5d5b6fde74bfe8b7f2217231ffd00e21141b440de5b49a8b3c1811bee0b17df4b35279e0e6abc

Download Submit
C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe

Filesize
2.1MB

MD5
fa0d98a41f4aa0a463f1fce155e64eb4

SHA1
e567e910c7f61fc28c96b41d8a48a19f6b59bc72

SHA256
cb42cc1ff1183b70803d02d4f4665b9afb274b8e4591f57ef41f0ecf2a70c1a2

SHA512
7825073ea97df83cd5823303f0a2ffd50c29d13a460af8e2d6adeb4285f0b439133062a6f0cdb2f9429cd18e52ceaa9637bd9d9bde39f8fe4d494b90d153f1f7

Download Submit
C:\Windows\System32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe

Filesize
1.3MB

MD5
46e7f6acb0ef8a6f48754703b574b66f

SHA1
8d43fad37fb2580ee7feeece03d32b72065e15c1

SHA256
7995e0be800144323d08bb196491fd581005acccbde4bc511e5afcad49d6c947

SHA512
850b501ff632fb8157304a5d9d559543d519c22eda23b69ff274732c483ac951600b27d33508bccdcad75a754174baa456ce9e2ac9d6fc5d38c7ecaa507709e7

Download Submit
C:\Windows\System32\FXSSVC.exe

Filesize
1.2MB

MD5
e3f85ffec7faabc6028bfca0a578bbce

SHA1
cb0baf27629708a1a9a2712943bf2025ce16de28

SHA256
6b8335e7463d8a954c66b814e46ad65a9151c62070534d10f057b6183c47c492

SHA512
200b0507b9afbd8c9193f6dac999085c4e0a35e2c9292f7240ec97ac84e2ee432f9cb67424d12ebb437e6b45ae7d1d344c53772adc968bb0715621aafb40db46

Download Submit
C:\Windows\System32\alg.exe

Filesize
1.3MB

MD5
4a831043175b09fac62deea276c2946a

SHA1
b1a22f62db47213e29cc919175820031b34cd2e4

SHA256
8c7a40ad556905bc8a83cec45c73edca5e54a8cc8a1dbb62a1da232b0c00ea1b

SHA512
792acec4333a193b022e2944a21376ff564028039dc3d1b001344cc31a8ce892b26cf8cf92f1fc3c63b6b3e76236c95b945d1550d1bbc097f5b2560a43f91bc0

Download Submit
memory/664-234-0x0000000140000000-0x0000000140237000-memory.dmp

Filesize
2.2MB

Download
memory/664-198-0x00000000004D0000-0x0000000000530000-memory.dmp

Filesize
384KB

Download
memory/664-204-0x00000000004D0000-0x0000000000530000-memory.dmp

Filesize
384KB

Download
memory/664-207-0x0000000140000000-0x0000000140237000-memory.dmp

Filesize
2.2MB

Download
memory/1216-136-0x0000000005730000-0x000000000573A000-memory.dmp

Filesize
40KB

Download
memory/1216-133-0x0000000000040000-0x00000000001C4000-memory.dmp

Filesize
1.5MB

Download
memory/1216-138-0x0000000004A80000-0x0000000004A90000-memory.dmp

Filesize
64KB

Download
memory/1216-137-0x0000000004A80000-0x0000000004A90000-memory.dmp

Filesize
64KB

Download
memory/1216-134-0x0000000004FB0000-0x0000000005554000-memory.dmp

Filesize
5.6MB

Download
memory/1216-139-0x00000000079F0000-0x0000000007A8C000-memory.dmp

Filesize
624KB

Download
memory/1216-135-0x0000000004AA0000-0x0000000004B32000-memory.dmp

Filesize
584KB

Download
memory/2616-181-0x0000000140000000-0x0000000140200000-memory.dmp

Filesize
2.0MB

Download
memory/2616-171-0x0000000000670000-0x00000000006D0000-memory.dmp

Filesize
384KB

Download
memory/2616-177-0x0000000000670000-0x00000000006D0000-memory.dmp

Filesize
384KB

Download
memory/2800-221-0x0000000140000000-0x0000000140221000-memory.dmp

Filesize
2.1MB

Download
memory/2800-220-0x0000000001A00000-0x0000000001A60000-memory.dmp

Filesize
384KB

Download
memory/2952-168-0x0000000140000000-0x0000000140201000-memory.dmp

Filesize
2.0MB

Download
memory/2952-163-0x00000000004A0000-0x0000000000500000-memory.dmp

Filesize
384KB

Download
memory/2952-157-0x00000000004A0000-0x0000000000500000-memory.dmp

Filesize
384KB

Download
memory/2992-169-0x0000000001230000-0x0000000001296000-memory.dmp

Filesize
408KB

Download
memory/2992-182-0x00000000057C0000-0x00000000057D0000-memory.dmp

Filesize
64KB

Download
memory/3640-149-0x0000000000400000-0x0000000000654000-memory.dmp

Filesize
2.3MB

Download
memory/3640-150-0x0000000003170000-0x00000000031D6000-memory.dmp

Filesize
408KB

Download
memory/3640-140-0x0000000000400000-0x0000000000654000-memory.dmp

Filesize
2.3MB

Download
memory/3640-143-0x0000000000400000-0x0000000000654000-memory.dmp

Filesize
2.3MB

Download
memory/3640-144-0x0000000003170000-0x00000000031D6000-memory.dmp

Filesize
408KB

Download
memory/3640-179-0x0000000000400000-0x0000000000654000-memory.dmp

Filesize
2.3MB

Download
memory/4940-215-0x0000000000190000-0x00000000001F0000-memory.dmp

Filesize
384KB

Download
memory/4940-217-0x0000000140000000-0x000000014022B000-memory.dmp

Filesize
2.2MB

Download
memory/4940-209-0x0000000000190000-0x00000000001F0000-memory.dmp

Filesize
384KB

Download
memory/4940-235-0x0000000140000000-0x000000014022B000-memory.dmp

Filesize
2.2MB

Download
memory/4944-196-0x0000000140000000-0x0000000140135000-memory.dmp

Filesize
1.2MB

Download
memory/4944-185-0x00000000008C0000-0x0000000000920000-memory.dmp

Filesize
384KB

Download
memory/4944-191-0x00000000008C0000-0x0000000000920000-memory.dmp

Filesize
384KB

Download
memory/4944-193-0x00000000008C0000-0x0000000000920000-memory.dmp

Filesize
384KB

Download

Analysis

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