guloader | 4648996757958c60d49d829678d146b903a5c93ba3aaecddf4aed15af02041cc

General

Target

confirmación de pago.exe
Size

1.1MB
MD5

fa7328d8646b5f0f829738e14610f257
SHA1

4def8c21df1481145724218ca182d69dfcd60fe7
SHA256

4648996757958c60d49d829678d146b903a5c93ba3aaecddf4aed15af02041cc
SHA512

a880b44e7777dcf2abdd456568ccebff925260c76daf782a80393ec771381246964baea0142fdb160684e0aa2d426ac37941dc4689955eceb959f842f20568f3
SSDEEP

24576:xjlO4f0OMTtAkg7AecFq3ry+HNU7OIdzkL3:xMQ0ftAr7BcFgHNUlV83

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

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

Web Service

T1102

flow	ioc
25	drive.google.com
26	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
44	reallyfreegeoip.org
45	reallyfreegeoip.org
41	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4900	confirmación de pago.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
536	confirmación de pago.exe
4900	confirmación de pago.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\styrbordets.Vet	confirmación de pago.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	confirmación de pago.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	confirmación de pago.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4900	confirmación de pago.exe
4900	confirmación de pago.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
536	confirmación de pago.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4900	confirmación de pago.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 4900	536	confirmación de pago.exe	92
PID 536 wrote to memory of 4900	536	confirmación de pago.exe	92
PID 536 wrote to memory of 4900	536	confirmación de pago.exe	92
PID 536 wrote to memory of 4900	536	confirmación de pago.exe	92

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	confirmación de pago.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	confirmación de pago.exe

C:\Users\Admin\AppData\Local\Temp\confirmación de pago.exe
"C:\Users\Admin\AppData\Local\Temp\confirmación de pago.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:536
- C:\Users\Admin\AppData\Local\Temp\confirmación de pago.exe
  "C:\Users\Admin\AppData\Local\Temp\confirmación de pago.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:4900

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\nsjDB9C.tmp\System.dll

Filesize
11KB

MD5
c61501f07cf09bcfcdfe4cc8a1ebbbe3

SHA1
e8581b4359651b857646ae727efaaef372daa0fc

SHA256
7e75f148920db6300dad5a1c12fd5d6eecc95698a310a01311181bc98a704d55

SHA512
9837abe7ec3fa0f1f5193968d12b7ca1893e34eddf628db1f7ab6715b4de339231f0ec1b5f0f86c767f5a30c40da5c4a95e99deedd22eece93cb0d00539aad24

Download Submit
memory/536-14-0x00000000027E0000-0x000000000438E000-memory.dmp

Filesize
27.7MB

Download
memory/536-15-0x0000000076FA1000-0x00000000770C1000-memory.dmp

Filesize
1.1MB

Download
memory/536-16-0x0000000074445000-0x0000000074446000-memory.dmp

Filesize
4KB

Download
memory/536-17-0x00000000027E0000-0x000000000438E000-memory.dmp

Filesize
27.7MB

Download
memory/4900-18-0x0000000001700000-0x00000000032AE000-memory.dmp

Filesize
27.7MB

Download
memory/4900-19-0x0000000001700000-0x00000000032AE000-memory.dmp

Filesize
27.7MB

Download
memory/4900-20-0x0000000077028000-0x0000000077029000-memory.dmp

Filesize
4KB

Download
memory/4900-21-0x0000000077045000-0x0000000077046000-memory.dmp

Filesize
4KB

Download
memory/4900-22-0x0000000001700000-0x00000000032AE000-memory.dmp

Filesize
27.7MB

Download
memory/4900-23-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/4900-24-0x0000000076FA1000-0x00000000770C1000-memory.dmp

Filesize
1.1MB

Download
memory/4900-37-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/4900-39-0x00000000004A0000-0x00000000004EA000-memory.dmp

Filesize
296KB

Download
memory/4900-38-0x0000000001700000-0x00000000032AE000-memory.dmp

Filesize
27.7MB

Download
memory/4900-40-0x0000000036170000-0x0000000036714000-memory.dmp

Filesize
5.6MB

Download
memory/4900-41-0x0000000036050000-0x00000000360EC000-memory.dmp

Filesize
624KB

Download
memory/4900-44-0x0000000036C30000-0x0000000036DF2000-memory.dmp

Filesize
1.8MB

Download
memory/4900-45-0x0000000036E00000-0x0000000036E50000-memory.dmp

Filesize
320KB

Download
memory/4900-46-0x0000000036ED0000-0x00000000373FC000-memory.dmp

Filesize
5.2MB

Download
memory/4900-48-0x0000000033930000-0x00000000339C2000-memory.dmp

Filesize
584KB

Download
memory/4900-49-0x00000000339F0000-0x00000000339FA000-memory.dmp

Filesize
40KB

Download

Analysis

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