guloader | ee88d22559d5dd4a84a1ab465da459608e97d0ee4c36b976ea9d03c67d492e3f

General

Target

rSlutelementer.exe
Size

670KB
MD5

c92f3d8130dd4237ac916e1b5fe0effb
SHA1

9fe18cb8f0182a87a8414b04c59a6822b6c37832
SHA256

ee88d22559d5dd4a84a1ab465da459608e97d0ee4c36b976ea9d03c67d492e3f
SHA512

1ca27a6535e9ca4ab76063c54f16864dd3189ef6f3f6ee9018a7cc60ef23fae3dfdaa5c03a53a4d29ce903bd5c38694c0a2fa0210e27d39e304af3489bbc5b27
SSDEEP

12288:Xa/AcZ6qJ2s1+pBOi+ojssq/uLkV3WKrHWnj7x+OC2XdgjPEmADNA0EpphZNG2j:X4Z6SQB5+kssq/5WCWfIjsmY0j

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot8172976107:AAH5CXqEBGFF-CK18VpImdWAW7U_9296FqY/sendMessage?chat_id=6885960134

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
2128	rSlutelementer.exe
2128	rSlutelementer.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-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rSlutelementer.exe
Key opened	\REGISTRY\USER\S-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rSlutelementer.exe
Key opened	\REGISTRY\USER\S-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rSlutelementer.exe

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

Web Service

T1102

flow	ioc
19	drive.google.com
20	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
35	reallyfreegeoip.org
36	reallyfreegeoip.org
30	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4680	rSlutelementer.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2128	rSlutelementer.exe
4680	rSlutelementer.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	rSlutelementer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rSlutelementer.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4680	rSlutelementer.exe
4680	rSlutelementer.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2128	rSlutelementer.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4680	rSlutelementer.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 4680	2128	rSlutelementer.exe	89
PID 2128 wrote to memory of 4680	2128	rSlutelementer.exe	89
PID 2128 wrote to memory of 4680	2128	rSlutelementer.exe	89
PID 2128 wrote to memory of 4680	2128	rSlutelementer.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rSlutelementer.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rSlutelementer.exe

C:\Users\Admin\AppData\Local\Temp\rSlutelementer.exe
"C:\Users\Admin\AppData\Local\Temp\rSlutelementer.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Users\Admin\AppData\Local\Temp\rSlutelementer.exe
  "C:\Users\Admin\AppData\Local\Temp\rSlutelementer.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:4680

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\nsi8F21.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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

Filesize
848B

MD5
4551433f74c8ca6bbf3a2de8886d1b9d

SHA1
b1ee664886801833b8a64da7fdcc8bf9c464ef6a

SHA256
674265b8930fc8fccf03791c012514585dcbda9238cecd23113bd4e51877712e

SHA512
86de705498b99c12f8e8268c2682c523daa2c122b9cc4c66a3c407dfba3ac173d54ec7222b614ff6a9d9d295b7461efdebeb3be4e19840737a225db55350ee50

Download Submit
memory/2128-307-0x00000000777F1000-0x0000000077911000-memory.dmp

Filesize
1.1MB

Download
memory/2128-309-0x0000000074C95000-0x0000000074C96000-memory.dmp

Filesize
4KB

Download
memory/2128-308-0x00000000777F1000-0x0000000077911000-memory.dmp

Filesize
1.1MB

Download
memory/4680-330-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/4680-331-0x0000000037EC0000-0x0000000038464000-memory.dmp

Filesize
5.6MB

Download
memory/4680-312-0x0000000077895000-0x0000000077896000-memory.dmp

Filesize
4KB

Download
memory/4680-327-0x00000000777F1000-0x0000000077911000-memory.dmp

Filesize
1.1MB

Download
memory/4680-325-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4680-326-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4680-329-0x00000000726EE000-0x00000000726EF000-memory.dmp

Filesize
4KB

Download
memory/4680-310-0x00000000016F0000-0x0000000004FD4000-memory.dmp

Filesize
56.9MB

Download
memory/4680-328-0x00000000016F0000-0x0000000004FD4000-memory.dmp

Filesize
56.9MB

Download
memory/4680-311-0x0000000077878000-0x0000000077879000-memory.dmp

Filesize
4KB

Download
memory/4680-332-0x0000000038470000-0x000000003850C000-memory.dmp

Filesize
624KB

Download
memory/4680-333-0x00000000726E0000-0x0000000072E90000-memory.dmp

Filesize
7.7MB

Download
memory/4680-335-0x00000000726EE000-0x00000000726EF000-memory.dmp

Filesize
4KB

Download
memory/4680-336-0x0000000038A70000-0x0000000038C32000-memory.dmp

Filesize
1.8MB

Download
memory/4680-337-0x0000000038C60000-0x0000000038CB0000-memory.dmp

Filesize
320KB

Download
memory/4680-338-0x0000000038D40000-0x000000003926C000-memory.dmp

Filesize
5.2MB

Download
memory/4680-339-0x00000000726E0000-0x0000000072E90000-memory.dmp

Filesize
7.7MB

Download
memory/4680-341-0x00000000392C0000-0x0000000039352000-memory.dmp

Filesize
584KB

Download
memory/4680-342-0x00000000393B0000-0x00000000393BA000-memory.dmp

Filesize
40KB

Download

Analysis

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