guloader | e1f2542f3101147997bf37471bb1615d758dae834d354496463e69c60f8ea371

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2024 05:52

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General

Target

IBAN Payment confirmation.exe
Size

1.1MB
MD5

c6405da7bf6402e89bdbbd7e53f8a3ee
SHA1

442c0c100d9f8e635e9b6e9db07878903103054a
SHA256

e1f2542f3101147997bf37471bb1615d758dae834d354496463e69c60f8ea371
SHA512

a20ba8aad10e53d791f0811f06453518d8971a02329f00e0d61537c3a78519fdbe02bc463395ba44bce1893987414647ff7063df4815ff232bb3dd9d2bb3e018
SSDEEP

24576:lp7xzos/n1G9l+O/KE8hJKpJzeDgWTvdpomEygOXjM:zxzog1Gph8hazvwUmEygn

Score

10^/10

guloader collection 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
2304	IBAN Payment confirmation.exe
2304	IBAN Payment confirmation.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IBAN Payment confirmation.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IBAN Payment confirmation.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IBAN Payment confirmation.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 1 IoCs

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

flow	ioc
36	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1980	IBAN Payment confirmation.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2304	IBAN Payment confirmation.exe
1980	IBAN Payment confirmation.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 1980	2304	IBAN Payment confirmation.exe	86

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\inconversibility\agouti.ini	IBAN Payment confirmation.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 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	IBAN Payment confirmation.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IBAN Payment confirmation.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1980	IBAN Payment confirmation.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2304	IBAN Payment confirmation.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	IBAN Payment confirmation.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1980	2304	IBAN Payment confirmation.exe	86
PID 2304 wrote to memory of 1980	2304	IBAN Payment confirmation.exe	86
PID 2304 wrote to memory of 1980	2304	IBAN Payment confirmation.exe	86
PID 2304 wrote to memory of 1980	2304	IBAN Payment confirmation.exe	86
PID 2304 wrote to memory of 1980	2304	IBAN Payment confirmation.exe	86

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IBAN Payment confirmation.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IBAN Payment confirmation.exe

C:\Users\Admin\AppData\Local\Temp\IBAN Payment confirmation.exe
"C:\Users\Admin\AppData\Local\Temp\IBAN Payment confirmation.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:2304
- C:\Users\Admin\AppData\Local\Temp\IBAN Payment confirmation.exe
  "C:\Users\Admin\AppData\Local\Temp\IBAN Payment confirmation.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:1980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsbA3D3.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1980-38-0x0000000001720000-0x0000000003E8F000-memory.dmp

Filesize
39.4MB

Download
memory/1980-39-0x00000000349D0000-0x0000000034A6C000-memory.dmp

Filesize
624KB

Download
memory/1980-35-0x00000000004C0000-0x0000000001714000-memory.dmp

Filesize
18.3MB

Download
memory/1980-43-0x00000000379F0000-0x00000000379FA000-memory.dmp

Filesize
40KB

Download
memory/1980-36-0x00000000004C0000-0x00000000004DE000-memory.dmp

Filesize
120KB

Download
memory/1980-42-0x0000000037760000-0x0000000037922000-memory.dmp

Filesize
1.8MB

Download
memory/1980-21-0x0000000001720000-0x0000000003E8F000-memory.dmp

Filesize
39.4MB

Download
memory/1980-37-0x0000000036D50000-0x00000000372F4000-memory.dmp

Filesize
5.6MB

Download
memory/1980-41-0x0000000037440000-0x0000000037490000-memory.dmp

Filesize
320KB

Download
memory/1980-40-0x00000000375A0000-0x0000000037632000-memory.dmp

Filesize
584KB

Download
memory/1980-34-0x00000000004C0000-0x0000000001714000-memory.dmp

Filesize
18.3MB

Download
memory/2304-20-0x00000000033F0000-0x0000000005B5F000-memory.dmp

Filesize
39.4MB

Download
memory/2304-15-0x00000000033F0000-0x0000000005B5F000-memory.dmp

Filesize
39.4MB

Download
memory/2304-16-0x00000000033F0000-0x0000000005B5F000-memory.dmp

Filesize
39.4MB

Download
memory/2304-18-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2304-19-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/2304-17-0x0000000077671000-0x0000000077791000-memory.dmp

Filesize
1.1MB

Download