guloader | 509b443e6b1855ea091674d7d8cb9df45673d0d7ec019d399f0386cf86b3f846

General

Target

Factura 1-000122.exe
Size

670KB
MD5

67fd23f749d746da7fe2093aca29ed51
SHA1

58a8e61356d69b5388357c4d40276ebc0f5be7f5
SHA256

4aa360e16b659d45873d003f06f34ba82af7966b068a22f2fba2acdb83fb01b6
SHA512

f0ae9cbbe2fbab3cce379d86b40567e3517598734f3cfd51a5d6a61bbab674d9f594c3af4b9b335a03308cfeb414dd7455628389908bf2dbc72890ea76debfbe
SSDEEP

12288:Xa/AcZ6qJ2s1+pBOi2f0yU0VhlhU4tG/U2XdgjPEmADNA0EpphZNG26:X4Z6SQB5qnrD2/ijsmY06

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7040312407:AAFWVlSIzsmV7GmLpQj1tUsYJkbKZM5-bUU/sendMessage?chat_id=7763958191

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
2216	Factura 1-000122.exe
2216	Factura 1-000122.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-1-5-21-1874072718-2205492803-118941907-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Factura 1-000122.exe
Key opened	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Factura 1-000122.exe
Key opened	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Factura 1-000122.exe

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

Web Service

T1102

flow	ioc
10	drive.google.com
11	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
34	checkip.dyndns.org
37	reallyfreegeoip.org
38	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4392	Factura 1-000122.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2216	Factura 1-000122.exe
4392	Factura 1-000122.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	Factura 1-000122.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Factura 1-000122.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4392	Factura 1-000122.exe
4392	Factura 1-000122.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2216	Factura 1-000122.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4392	Factura 1-000122.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 4392	2216	Factura 1-000122.exe	88
PID 2216 wrote to memory of 4392	2216	Factura 1-000122.exe	88
PID 2216 wrote to memory of 4392	2216	Factura 1-000122.exe	88
PID 2216 wrote to memory of 4392	2216	Factura 1-000122.exe	88

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Factura 1-000122.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Factura 1-000122.exe

C:\Users\Admin\AppData\Local\Temp\Factura 1-000122.exe
"C:\Users\Admin\AppData\Local\Temp\Factura 1-000122.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Local\Temp\Factura 1-000122.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura 1-000122.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:4392

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\nsr8ACC.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
C:\Users\Admin\Music\timelanges.lnk

Filesize
832B

MD5
6030173800d08e80873fe6df339b63b8

SHA1
d06218590dd28d3970a64d640dd6cf4cbc044913

SHA256
1dbc84b29cbb161d0830f6305f2d8b9c2a00c552a370d10501f8e4cd544f068b

SHA512
7cae8510ce1dfd828ab80da6f50237dd94f3214d6b15040b7bc17d98a68505bf731d16b734212f23fc206f0eef08ef90f705b4af6423472113ee243f57e872e9

Download Submit
memory/2216-307-0x0000000077041000-0x0000000077161000-memory.dmp

Filesize
1.1MB

Download
memory/2216-308-0x0000000077041000-0x0000000077161000-memory.dmp

Filesize
1.1MB

Download
memory/2216-309-0x00000000744E5000-0x00000000744E6000-memory.dmp

Filesize
4KB

Download
memory/4392-331-0x0000000071F3E000-0x0000000071F3F000-memory.dmp

Filesize
4KB

Download
memory/4392-333-0x0000000039080000-0x0000000039624000-memory.dmp

Filesize
5.6MB

Download
memory/4392-312-0x00000000770E5000-0x00000000770E6000-memory.dmp

Filesize
4KB

Download
memory/4392-327-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4392-330-0x0000000077041000-0x0000000077161000-memory.dmp

Filesize
1.1MB

Download
memory/4392-328-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4392-329-0x00000000016F0000-0x0000000006237000-memory.dmp

Filesize
75.3MB

Download
memory/4392-310-0x00000000016F0000-0x0000000006237000-memory.dmp

Filesize
75.3MB

Download
memory/4392-332-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/4392-311-0x00000000770C8000-0x00000000770C9000-memory.dmp

Filesize
4KB

Download
memory/4392-334-0x0000000038F70000-0x000000003900C000-memory.dmp

Filesize
624KB

Download
memory/4392-335-0x0000000077041000-0x0000000077161000-memory.dmp

Filesize
1.1MB

Download
memory/4392-336-0x0000000071F30000-0x00000000726E0000-memory.dmp

Filesize
7.7MB

Download
memory/4392-338-0x0000000071F3E000-0x0000000071F3F000-memory.dmp

Filesize
4KB

Download
memory/4392-339-0x0000000071F30000-0x00000000726E0000-memory.dmp

Filesize
7.7MB

Download
memory/4392-340-0x0000000039B60000-0x0000000039D22000-memory.dmp

Filesize
1.8MB

Download
memory/4392-341-0x0000000039D40000-0x0000000039D90000-memory.dmp

Filesize
320KB

Download
memory/4392-342-0x0000000039E20000-0x000000003A34C000-memory.dmp

Filesize
5.2MB

Download
memory/4392-344-0x000000003A3A0000-0x000000003A432000-memory.dmp

Filesize
584KB

Download
memory/4392-345-0x000000003A490000-0x000000003A49A000-memory.dmp

Filesize
40KB

Download

Analysis

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