guloader | 05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d

General

Target

05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
Size

717KB
MD5

143edb6c5c1e1a1e06695965f2b5cb74
SHA1

b43660357dbe4c3d84d4239b6273817b5eb1ff53
SHA256

05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d
SHA512

8656e2e854a66f2901898147303fa5119c691defc06745d38d93ce0ef06ff243d85b8d0d109d0ef18c4bb3b1de29a5c76961b85a77959c0d93b9179546bbe761
SSDEEP

12288:xlYZmcRHOohpeGbzpAbzRglY6y/utl97avDAoXPJO2RpXD3j:UmcdOohMyz5Y6yK7arHXPJOyXjj

Score

10^/10

guloader discovery downloader evasion spyware stealer

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Disables Task Manager via registry modification
evasion

Loads dropped DLL 2 IoCs

pid	Process
1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

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

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

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
14	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2684	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
2684	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1776 set thread context of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31

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	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31
PID 1776 wrote to memory of 2684	1776	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	31

C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
"C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1776
- C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
  "C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2684

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

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsjB425.tmp\System.dll

Filesize
11KB

MD5
fc90dfb694d0e17b013d6f818bce41b0

SHA1
3243969886d640af3bfa442728b9f0dff9d5f5b0

SHA256
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528

SHA512
324f13aa7a33c6408e2a57c3484d1691ecee7c3c1366de2bb8978c8dc66b18425d8cab5a32d1702c13c43703e36148a022263de7166afdce141da2b01169f1c6

Download Submit
memory/1776-15-0x0000000003830000-0x00000000064F5000-memory.dmp

Filesize
44.8MB

Download
memory/1776-16-0x0000000077211000-0x0000000077312000-memory.dmp

Filesize
1.0MB

Download
memory/1776-17-0x0000000077210000-0x00000000773B9000-memory.dmp

Filesize
1.7MB

Download
memory/1776-18-0x0000000003830000-0x00000000064F5000-memory.dmp

Filesize
44.8MB

Download
memory/2684-19-0x0000000077210000-0x00000000773B9000-memory.dmp

Filesize
1.7MB

Download
memory/2684-39-0x00000000004B0000-0x0000000001512000-memory.dmp

Filesize
16.4MB

Download
memory/2684-40-0x00000000004B0000-0x0000000001512000-memory.dmp

Filesize
16.4MB

Download
memory/2684-41-0x00000000004B0000-0x00000000004CE000-memory.dmp

Filesize
120KB

Download

Analysis

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