guloader | 6aa4aecddd8e0ffc3b3cee5987c88d34eb7cb048cb5a42983b2b223875182bd4

Analysis

max time kernel
140s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-10-2024 14:22

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General

Target

Certificado FNMT-RCM.exe
Size

784KB
MD5

d5124313ebf51a883392d6171e9b7049
SHA1

72c137198f1893be9f5a73a89967889895160117
SHA256

6aa4aecddd8e0ffc3b3cee5987c88d34eb7cb048cb5a42983b2b223875182bd4
SHA512

dfda9be5f1641ab3567f483cb80d340fefa30ec893ba9af42d687726f8ef07d2ee7457ae45a10e3f6d087206693e01239f2c3ec3e9aaa23b9dab21f371c453fd
SSDEEP

12288:I5gGipxkBKTBX7yFUJFLoEaOAUGsoj5eTZa86q+gdD3/86DtrmT9cPfRNLiyi7TH:5GiwB4NyF8olhRj5eKq+Y/gcHv+yIdv

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

https://api.telegram.org/bot7500341588:AAHsqawFdC2urnq1E6blZy5E3r-OiJvH9ZA/sendMessage?chat_id=7267131103

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 1 IoCs

pid	Process
3120	Certificado FNMT-RCM.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Certificado FNMT-RCM.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Certificado FNMT-RCM.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Certificado FNMT-RCM.exe

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

Web Service

T1102

flow	ioc
42	drive.google.com
43	drive.google.com

Looks up external IP address via web service 1 IoCs

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

flow	ioc
54	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1168	Certificado FNMT-RCM.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3120	Certificado FNMT-RCM.exe
1168	Certificado FNMT-RCM.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3120 set thread context of 1168	3120	Certificado FNMT-RCM.exe	101

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\rollerskater.lnk	Certificado FNMT-RCM.exe
File opened for modification	C:\Program Files (x86)\rollerskater.lnk	Certificado FNMT-RCM.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	Certificado FNMT-RCM.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Certificado FNMT-RCM.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1168	Certificado FNMT-RCM.exe
1168	Certificado FNMT-RCM.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3120	Certificado FNMT-RCM.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1168	Certificado FNMT-RCM.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3120 wrote to memory of 1168	3120	Certificado FNMT-RCM.exe	101
PID 3120 wrote to memory of 1168	3120	Certificado FNMT-RCM.exe	101
PID 3120 wrote to memory of 1168	3120	Certificado FNMT-RCM.exe	101
PID 3120 wrote to memory of 1168	3120	Certificado FNMT-RCM.exe	101
PID 3120 wrote to memory of 1168	3120	Certificado FNMT-RCM.exe	101

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Certificado FNMT-RCM.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Certificado FNMT-RCM.exe

C:\Users\Admin\AppData\Local\Temp\Certificado FNMT-RCM.exe
"C:\Users\Admin\AppData\Local\Temp\Certificado FNMT-RCM.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3120
- C:\Users\Admin\AppData\Local\Temp\Certificado FNMT-RCM.exe
  "C:\Users\Admin\AppData\Local\Temp\Certificado FNMT-RCM.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:1168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsc807B.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/1168-37-0x0000000035410000-0x00000000359B4000-memory.dmp

Filesize
5.6MB

Download
memory/1168-18-0x00000000016E0000-0x00000000026A3000-memory.dmp

Filesize
15.8MB

Download
memory/1168-34-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/1168-44-0x0000000036230000-0x000000003623A000-memory.dmp

Filesize
40KB

Download
memory/1168-35-0x0000000077691000-0x00000000777B1000-memory.dmp

Filesize
1.1MB

Download
memory/1168-19-0x0000000077718000-0x0000000077719000-memory.dmp

Filesize
4KB

Download
memory/1168-20-0x0000000077735000-0x0000000077736000-memory.dmp

Filesize
4KB

Download
memory/1168-36-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/1168-43-0x0000000036160000-0x00000000361F2000-memory.dmp

Filesize
584KB

Download
memory/1168-41-0x0000000036090000-0x00000000360E0000-memory.dmp

Filesize
320KB

Download
memory/1168-33-0x00000000016E0000-0x00000000026A3000-memory.dmp

Filesize
15.8MB

Download
memory/1168-40-0x0000000035EC0000-0x0000000036082000-memory.dmp

Filesize
1.8MB

Download
memory/1168-38-0x00000000352A0000-0x000000003533C000-memory.dmp

Filesize
624KB

Download
memory/3120-14-0x00000000041D0000-0x0000000005193000-memory.dmp

Filesize
15.8MB

Download
memory/3120-15-0x0000000077691000-0x00000000777B1000-memory.dmp

Filesize
1.1MB

Download
memory/3120-16-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3120-17-0x00000000041D0000-0x0000000005193000-memory.dmp

Filesize
15.8MB

Download