guloader | 26d660c77b9a20135f884a2cbf2b26b3df22c2746f7b605fb8c0b08dc12a48af

General

Target

6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
Size

1.1MB
MD5

35ee6e0d45ac82619b30c88ae3ac40fe
SHA1

ae1c2d10f66c8cc4574643b40fb17d428b868aa5
SHA256

6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8
SHA512

c2631034c0f3136aefae310335b4d41a42cc0be0d5e87e3fd10aaf0a50a9262584a0dbdf6aaeb33322a3d385f373d093613a23a1269b013f180abe3a0f91a093
SSDEEP

24576:/V8oyndYnqJpB7Zj16wbfqiPACOedfHYNXNHA6:/V8BfJphZl/ACOdHA

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7745751910:AAGY46QDCTWO_Pw9iDqZhkNij-i4uwbMgzE/sendMessage?chat_id=7695061973

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
stealer keylogger vipkeylogger
Vipkeylogger family
vipkeylogger

Loads dropped DLL 2 IoCs

pid	Process
3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2671265011-1578681955-3068118665-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
Key opened	\REGISTRY\USER\S-1-5-21-2671265011-1578681955-3068118665-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
Key opened	\REGISTRY\USER\S-1-5-21-2671265011-1578681955-3068118665-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
13	drive.google.com
12	drive.google.com

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
29	reallyfreegeoip.org
25	checkip.dyndns.org
27	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1824	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
1824	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Peppercorns241\septobasidium.ini	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1824	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
1824	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 1824	3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe	85
PID 3608 wrote to memory of 1824	3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe	85
PID 3608 wrote to memory of 1824	3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe	85
PID 3608 wrote to memory of 1824	3608	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe	85

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2671265011-1578681955-3068118665-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2671265011-1578681955-3068118665-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe

C:\Users\Admin\AppData\Local\Temp\6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
"C:\Users\Admin\AppData\Local\Temp\6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Users\Admin\AppData\Local\Temp\6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe
  "C:\Users\Admin\AppData\Local\Temp\6b11ef45fe61a72300142c891c2855febf4e3bac1b00104cf6dd10e6520a10c8.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Browser Information Discovery

1

T1217

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsa1E81.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/1824-42-0x000000007220E000-0x000000007220F000-memory.dmp

Filesize
4KB

Download
memory/1824-49-0x0000000072200000-0x00000000729B0000-memory.dmp

Filesize
7.7MB

Download
memory/1824-43-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/1824-23-0x00000000016F0000-0x000000000639B000-memory.dmp

Filesize
76.7MB

Download
memory/1824-24-0x0000000077A88000-0x0000000077A89000-memory.dmp

Filesize
4KB

Download
memory/1824-25-0x0000000077AA5000-0x0000000077AA6000-memory.dmp

Filesize
4KB

Download
memory/1824-35-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1824-41-0x0000000077A01000-0x0000000077B21000-memory.dmp

Filesize
1.1MB

Download
memory/1824-44-0x00000000392E0000-0x0000000039884000-memory.dmp

Filesize
5.6MB

Download
memory/1824-40-0x00000000016F0000-0x000000000639B000-memory.dmp

Filesize
76.7MB

Download
memory/1824-57-0x00000000392C0000-0x00000000392CA000-memory.dmp

Filesize
40KB

Download
memory/1824-56-0x000000003A470000-0x000000003A502000-memory.dmp

Filesize
584KB

Download
memory/1824-39-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1824-45-0x00000000391E0000-0x000000003927C000-memory.dmp

Filesize
624KB

Download
memory/1824-46-0x0000000072200000-0x00000000729B0000-memory.dmp

Filesize
7.7MB

Download
memory/1824-48-0x0000000077A01000-0x0000000077B21000-memory.dmp

Filesize
1.1MB

Download
memory/1824-54-0x0000000039F40000-0x000000003A46C000-memory.dmp

Filesize
5.2MB

Download
memory/1824-52-0x0000000039D70000-0x0000000039F32000-memory.dmp

Filesize
1.8MB

Download
memory/1824-53-0x0000000036A20000-0x0000000036A70000-memory.dmp

Filesize
320KB

Download
memory/3608-22-0x00000000747F4000-0x00000000747F5000-memory.dmp

Filesize
4KB

Download
memory/3608-21-0x0000000077A01000-0x0000000077B21000-memory.dmp

Filesize
1.1MB

Download
memory/3608-20-0x0000000077A01000-0x0000000077B21000-memory.dmp

Filesize
1.1MB

Download

Analysis

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