guloader | b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35

Analysis

max time kernel
141s
max time network
125s
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 02:12

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General

Target

b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
Size

785KB
MD5

632bb0a566efd66ed7fdb905ea8c9803
SHA1

4c3e846fe594e7e10f5ed4f0d0a13de7290b4077
SHA256

b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35
SHA512

f525a1a238b3587ccef06f4baaa00bcdef362840ceb22d475c39a4b0d2b6abe1447959d9fe67bad45a082a0faff1c9ab7c8c71902bcd79b9201fb154cd297325
SSDEEP

12288:XDGxeWd8KhML5xEfN5JPafaM8czPA2f1gLd1U0jgaTeiZdHawb:W3ddhMLTElzPYaMtzP/9gLdO0VTnH

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

https://api.telegram.org/bot7902160942:AAGa4NniMhqzlNHvfBDtJeHrHFJi_wqVTDY/sendMessage?chat_id=7698865320

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.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-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

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

Web Service

T1102

flow	ioc
48	drive.google.com
47	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
60	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4576	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
4576	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 408 set thread context of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99

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	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4576	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
4576	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4576	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99
PID 408 wrote to memory of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99
PID 408 wrote to memory of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99
PID 408 wrote to memory of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99
PID 408 wrote to memory of 4576	408	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe	99

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe

C:\Users\Admin\AppData\Local\Temp\b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
"C:\Users\Admin\AppData\Local\Temp\b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:408
- C:\Users\Admin\AppData\Local\Temp\b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.exe
  "C:\Users\Admin\AppData\Local\Temp\b77de0fb855cd859678fd1d16e03af3114cde9b3f0636d0fb7b9674eae14fd35.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:4576

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsu9184.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/408-9-0x0000000005F10000-0x0000000007A1B000-memory.dmp

Filesize
27.0MB

Download
memory/408-10-0x0000000077991000-0x0000000077AB1000-memory.dmp

Filesize
1.1MB

Download
memory/408-11-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/408-12-0x0000000005F10000-0x0000000007A1B000-memory.dmp

Filesize
27.0MB

Download
memory/408-13-0x0000000005F10000-0x0000000007A1B000-memory.dmp

Filesize
27.0MB

Download
memory/4576-14-0x00000000016E0000-0x00000000031EB000-memory.dmp

Filesize
27.0MB

Download
memory/4576-15-0x0000000077A18000-0x0000000077A19000-memory.dmp

Filesize
4KB

Download
memory/4576-16-0x00000000016E0000-0x00000000031EB000-memory.dmp

Filesize
27.0MB

Download
memory/4576-17-0x0000000077A35000-0x0000000077A36000-memory.dmp

Filesize
4KB

Download
memory/4576-30-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4576-31-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4576-32-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/4576-33-0x0000000035E50000-0x00000000363F4000-memory.dmp

Filesize
5.6MB

Download
memory/4576-34-0x0000000036400000-0x000000003649C000-memory.dmp

Filesize
624KB

Download
memory/4576-35-0x0000000077991000-0x0000000077AB1000-memory.dmp

Filesize
1.1MB

Download
memory/4576-37-0x00000000368C0000-0x0000000036A82000-memory.dmp

Filesize
1.8MB

Download
memory/4576-38-0x0000000036AB0000-0x0000000036B00000-memory.dmp

Filesize
320KB

Download
memory/4576-39-0x0000000036B90000-0x0000000036C22000-memory.dmp

Filesize
584KB

Download
memory/4576-40-0x0000000036C60000-0x0000000036C6A000-memory.dmp

Filesize
40KB

Download