guloader | d6671c0032650d42dfaccb25d36507764dce6af6e577bcc7125559747be2da97

General

Target

S50MC-C_3170262-7.6cylinder_liner.exe
Size

552KB
MD5

17cb6775dad970024fc95ec9869edb3f
SHA1

1378dc79c453145e94fdb5e1cfaaf4d40cabd538
SHA256

d6671c0032650d42dfaccb25d36507764dce6af6e577bcc7125559747be2da97
SHA512

d0e19ca4a0a7f878a834347d5d4a294de3e83cc4541008f3a8bd28deb6ac87779803261e058de3b1ea51b068bb7e3e8d063dfdcd751220cfea8ff5149168d81d
SSDEEP

12288:32EIH/BAPq+05fmfLQ+1Uk2T2E7Rmd3ZhZZ:3wH+PqJCLQ+SkgpRmdPZZ

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot5049969282:AAH9uCOswhSYvcxjDJ1p81mZiTgnuLqELhE/sendMessage?chat_id=1398386501

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:

S50MC-C_3170262-7.6cylinder_liner.exe

pid	Process
1316	S50MC-C_3170262-7.6cylinder_liner.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:

S50MC-C_3170262-7.6cylinder_liner.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	S50MC-C_3170262-7.6cylinder_liner.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	S50MC-C_3170262-7.6cylinder_liner.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	S50MC-C_3170262-7.6cylinder_liner.exe

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
29	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

pid	Process
2336	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exeS50MC-C_3170262-7.6cylinder_liner.exe

pid	Process
1316	S50MC-C_3170262-7.6cylinder_liner.exe
2336	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	pid	Process	procid_target
PID 1316 set thread context of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88

Drops file in Windows directory 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	S50MC-C_3170262-7.6cylinder_liner.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:

S50MC-C_3170262-7.6cylinder_liner.exeS50MC-C_3170262-7.6cylinder_liner.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	S50MC-C_3170262-7.6cylinder_liner.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

pid	Process
2336	S50MC-C_3170262-7.6cylinder_liner.exe
2336	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

pid	Process
1316	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	pid	Process
Token: SeDebugPrivilege	2336	S50MC-C_3170262-7.6cylinder_liner.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	pid	Process	procid_target
PID 1316 wrote to memory of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88
PID 1316 wrote to memory of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88
PID 1316 wrote to memory of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88
PID 1316 wrote to memory of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88
PID 1316 wrote to memory of 2336	1316	S50MC-C_3170262-7.6cylinder_liner.exe	88

outlook_office_path 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	S50MC-C_3170262-7.6cylinder_liner.exe

outlook_win_path 1 IoCs

Processes:

S50MC-C_3170262-7.6cylinder_liner.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	S50MC-C_3170262-7.6cylinder_liner.exe

C:\Users\Admin\AppData\Local\Temp\S50MC-C_3170262-7.6cylinder_liner.exe
"C:\Users\Admin\AppData\Local\Temp\S50MC-C_3170262-7.6cylinder_liner.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:1316
- C:\Users\Admin\AppData\Local\Temp\S50MC-C_3170262-7.6cylinder_liner.exe
  "C:\Users\Admin\AppData\Local\Temp\S50MC-C_3170262-7.6cylinder_liner.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:2336

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsi7485.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/1316-8-0x0000000002E10000-0x0000000004B81000-memory.dmp

Filesize
29.4MB

Download
memory/1316-9-0x0000000077071000-0x0000000077191000-memory.dmp

Filesize
1.1MB

Download
memory/1316-10-0x0000000073D64000-0x0000000073D65000-memory.dmp

Filesize
4KB

Download
memory/1316-11-0x0000000002E10000-0x0000000004B81000-memory.dmp

Filesize
29.4MB

Download
memory/2336-12-0x0000000001A40000-0x00000000037B1000-memory.dmp

Filesize
29.4MB

Download
memory/2336-19-0x00000000007E0000-0x0000000001A34000-memory.dmp

Filesize
18.3MB

Download
memory/2336-20-0x00000000007E0000-0x000000000082A000-memory.dmp

Filesize
296KB

Download
memory/2336-21-0x0000000036410000-0x00000000369B4000-memory.dmp

Filesize
5.6MB

Download
memory/2336-22-0x0000000036210000-0x00000000362AC000-memory.dmp

Filesize
624KB

Download
memory/2336-24-0x0000000001A40000-0x00000000037B1000-memory.dmp

Filesize
29.4MB

Download
memory/2336-25-0x0000000036F00000-0x00000000370C2000-memory.dmp

Filesize
1.8MB

Download
memory/2336-26-0x00000000370D0000-0x0000000037120000-memory.dmp

Filesize
320KB

Download
memory/2336-27-0x0000000037170000-0x000000003769C000-memory.dmp

Filesize
5.2MB

Download
memory/2336-30-0x0000000033D10000-0x0000000033DA2000-memory.dmp

Filesize
584KB

Download
memory/2336-31-0x0000000033DD0000-0x0000000033DDA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads