guloader | 0757e2d1427c9baeefa1ec3aff84a4e6d862259c84ace769726c66192858f196

General

Target

Justificante.ex.exe
Size

1.1MB
MD5

4a896da2e79d9647adb4b9c7518d6a71
SHA1

9569a9066aa22c7c0f7ab7de13e0901ebba2acb9
SHA256

f223fc784ed382188a3cd4ffe1d6a641617e0738fc9e018680f739d982ae502d
SHA512

3613beba76753955c4b0c165a7d3d82538cb5888470ea5e3dfbe9f412ec5238cc8f67ce477af96fd572344e026c25ef7f298e82e51837bd3f1cfc41a4e1c5405
SSDEEP

24576:RV8oce+0nvEKaxHoioqmEwbfqiPACOedfHYNXNHA6u:RV8xjevTsIqa/ACOdHA/

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot8119135929:AAGv_owQnXugQZM3K0TRex_pZFatMkYkfzY/sendMessage?chat_id=6838630391

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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
20	3684	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2648	Justificante.ex.exe
2648	Justificante.ex.exe

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

Web Service

T1102

flow	ioc
26	drive.google.com
27	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
49	reallyfreegeoip.org
50	reallyfreegeoip.org
46	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2068	Justificante.ex.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2648	Justificante.ex.exe
2068	Justificante.ex.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Peppercorns241\septobasidium.ini	Justificante.ex.exe

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 3 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	Justificante.ex.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Justificante.ex.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1548	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2068	Justificante.ex.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2648	Justificante.ex.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	Justificante.ex.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2068	2648	Justificante.ex.exe	92
PID 2648 wrote to memory of 2068	2648	Justificante.ex.exe	92
PID 2648 wrote to memory of 2068	2648	Justificante.ex.exe	92
PID 2648 wrote to memory of 2068	2648	Justificante.ex.exe	92

C:\Users\Admin\AppData\Local\Temp\Justificante.ex.exe
"C:\Users\Admin\AppData\Local\Temp\Justificante.ex.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Users\Admin\AppData\Local\Temp\Justificante.ex.exe
  "C:\Users\Admin\AppData\Local\Temp\Justificante.ex.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2068

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI0IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY0MzMiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODc1OTU2NTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MDQ1Nzk4NDQ0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nscF137.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/2068-42-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2068-24-0x00000000016F0000-0x00000000067F5000-memory.dmp

Filesize
81.0MB

Download
memory/2068-25-0x0000000077728000-0x0000000077729000-memory.dmp

Filesize
4KB

Download
memory/2068-26-0x0000000077745000-0x0000000077746000-memory.dmp

Filesize
4KB

Download
memory/2068-27-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2068-31-0x00000000776A1000-0x00000000777C1000-memory.dmp

Filesize
1.1MB

Download
memory/2068-43-0x00000000016F0000-0x00000000067F5000-memory.dmp

Filesize
81.0MB

Download
memory/2068-44-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/2068-45-0x0000000039570000-0x0000000039B14000-memory.dmp

Filesize
5.6MB

Download
memory/2068-46-0x0000000039B20000-0x0000000039BBC000-memory.dmp

Filesize
624KB

Download
memory/2648-22-0x00000000776A1000-0x00000000777C1000-memory.dmp

Filesize
1.1MB

Download
memory/2648-23-0x0000000074234000-0x0000000074235000-memory.dmp

Filesize
4KB

Download
memory/2648-21-0x00000000776A1000-0x00000000777C1000-memory.dmp

Filesize
1.1MB

Download

Analysis

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