guloader | 0b7ba80811d300aefe42de77b7b8fb2d5b6f9a8d4f2cf3d1213b6fead5efb59b

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-10-2024 01:04

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General

Target

rFa24c148.exe
Size

981KB
MD5

7644ebbf786053ffaf95dbe86b7de5d4
SHA1

5d563fb10f6d71049ae5f69fb6ccb9f2217ddf32
SHA256

0b7ba80811d300aefe42de77b7b8fb2d5b6f9a8d4f2cf3d1213b6fead5efb59b
SHA512

d2da4f4ce1d26aca8e497e0d889d34ce9a4ec06b50245eb29a1feb7c7c20fce281e0dbefa37d234230163ebeaa602f1a49edee312024628387d2759896434a3c
SSDEEP

24576:ynE9Wlvj9UENDYuRe5In2hINGct2YBD9w254CQ+K1Q:yEiJUTOn2hINGctTDOBC7

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

https://api.telegram.org/bot8148338634:AAFvLNrhxaF7bMPzQMLbUnueRMJvDIi5kcU/sendMessage?chat_id=7698865320

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

Processes:

rFa24c148.exe

pid	Process
5052	rFa24c148.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

Processes:

rFa24c148.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rFa24c148.exe
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rFa24c148.exe
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rFa24c148.exe

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

Web Service

T1102

Processes:

flow	ioc
33	drive.google.com
34	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.

Processes:

flow	ioc
51	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

rFa24c148.exe

pid	Process
2860	rFa24c148.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

rFa24c148.exerFa24c148.exe

pid	Process
5052	rFa24c148.exe
2860	rFa24c148.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rFa24c148.exe

description	pid	Process	procid_target
PID 5052 set thread context of 2860	5052	rFa24c148.exe	99

Drops file in Windows directory 2 IoCs

Processes:

rFa24c148.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\olieaffald\Unconsummative103.pro	rFa24c148.exe
File opened for modification	C:\Windows\rocksanger\noninfluential.ini	rFa24c148.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

Processes:

rFa24c148.exerFa24c148.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rFa24c148.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rFa24c148.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rFa24c148.exe

pid	Process
2860	rFa24c148.exe
2860	rFa24c148.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

rFa24c148.exe

pid	Process
5052	rFa24c148.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rFa24c148.exe

description	pid	Process
Token: SeDebugPrivilege	2860	rFa24c148.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

rFa24c148.exe

description	pid	Process	procid_target
PID 5052 wrote to memory of 2860	5052	rFa24c148.exe	99
PID 5052 wrote to memory of 2860	5052	rFa24c148.exe	99
PID 5052 wrote to memory of 2860	5052	rFa24c148.exe	99
PID 5052 wrote to memory of 2860	5052	rFa24c148.exe	99
PID 5052 wrote to memory of 2860	5052	rFa24c148.exe	99

outlook_office_path 1 IoCs

Processes:

rFa24c148.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rFa24c148.exe

outlook_win_path 1 IoCs

Processes:

rFa24c148.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rFa24c148.exe

C:\Users\Admin\AppData\Local\Temp\rFa24c148.exe
"C:\Users\Admin\AppData\Local\Temp\rFa24c148.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Users\Admin\AppData\Local\Temp\rFa24c148.exe
  "C:\Users\Admin\AppData\Local\Temp\rFa24c148.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:2860

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\nst75FC.tmp\System.dll

Filesize
11KB

MD5
fc90dfb694d0e17b013d6f818bce41b0

SHA1
3243969886d640af3bfa442728b9f0dff9d5f5b0

SHA256
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528

SHA512
324f13aa7a33c6408e2a57c3484d1691ecee7c3c1366de2bb8978c8dc66b18425d8cab5a32d1702c13c43703e36148a022263de7166afdce141da2b01169f1c6

Download Submit
memory/2860-37-0x0000000035A30000-0x0000000035ACC000-memory.dmp

Filesize
624KB

Download
memory/2860-38-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/2860-35-0x00000000004A0000-0x00000000004E8000-memory.dmp

Filesize
288KB

Download
memory/2860-36-0x0000000035BD0000-0x0000000036174000-memory.dmp

Filesize
5.6MB

Download
memory/2860-18-0x0000000001700000-0x0000000002CC3000-memory.dmp

Filesize
21.8MB

Download
memory/2860-19-0x0000000077AD8000-0x0000000077AD9000-memory.dmp

Filesize
4KB

Download
memory/2860-20-0x0000000077AF5000-0x0000000077AF6000-memory.dmp

Filesize
4KB

Download
memory/2860-33-0x0000000001700000-0x0000000002CC3000-memory.dmp

Filesize
21.8MB

Download
memory/2860-44-0x00000000369D0000-0x00000000369DA000-memory.dmp

Filesize
40KB

Download
memory/2860-34-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/2860-43-0x0000000036900000-0x0000000036992000-memory.dmp

Filesize
584KB

Download
memory/2860-41-0x0000000036820000-0x0000000036870000-memory.dmp

Filesize
320KB

Download
memory/2860-39-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/2860-40-0x0000000036630000-0x00000000367F2000-memory.dmp

Filesize
1.8MB

Download
memory/5052-15-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/5052-14-0x0000000005230000-0x00000000067F3000-memory.dmp

Filesize
21.8MB

Download
memory/5052-17-0x0000000005230000-0x00000000067F3000-memory.dmp

Filesize
21.8MB

Download
memory/5052-16-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download