guloader | 4221c81003cc28d54d32c79e648174781b9b01091b40fbeeff41dfc1e3ed67cf

Analysis

max time kernel
150s
max time network
158s
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

RFQ Order list #2667747.exe
Size

1.1MB
MD5

a960ccb51d71f03c5007ef4d3f43d0f4
SHA1

89ceba1e59076fbf61cb9665205e07f88b579dd0
SHA256

4221c81003cc28d54d32c79e648174781b9b01091b40fbeeff41dfc1e3ed67cf
SHA512

7ecdbeec9e0eccd5c1e1fa1e453106fc38b440ca24d1d7af414fb0bd208e4cd19f03c1549240782b14db7e1a5b45cd358f5600e43503e0ef236fed198b1244c8
SSDEEP

24576:op7xzos/n1G9wKlc7il3VokalwuLTYz046T:Sxzog1GPSMSkaCBzC

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
2084	RFQ Order list #2667747.exe
2084	RFQ Order list #2667747.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	RFQ Order list #2667747.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ Order list #2667747.exe
Key opened	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ Order list #2667747.exe

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

Web Service

T1102

flow	ioc
19	drive.google.com
18	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
996	RFQ Order list #2667747.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2084	RFQ Order list #2667747.exe
996	RFQ Order list #2667747.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 996	2084	RFQ Order list #2667747.exe	89

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\inconversibility\agouti.ini	RFQ Order list #2667747.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	RFQ Order list #2667747.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ Order list #2667747.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
996	RFQ Order list #2667747.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2084	RFQ Order list #2667747.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	996	RFQ Order list #2667747.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 996	2084	RFQ Order list #2667747.exe	89
PID 2084 wrote to memory of 996	2084	RFQ Order list #2667747.exe	89
PID 2084 wrote to memory of 996	2084	RFQ Order list #2667747.exe	89
PID 2084 wrote to memory of 996	2084	RFQ Order list #2667747.exe	89
PID 2084 wrote to memory of 996	2084	RFQ Order list #2667747.exe	89

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	RFQ Order list #2667747.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	RFQ Order list #2667747.exe

C:\Users\Admin\AppData\Local\Temp\RFQ Order list #2667747.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ Order list #2667747.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:2084
- C:\Users\Admin\AppData\Local\Temp\RFQ Order list #2667747.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ Order list #2667747.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:996

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\nseA952.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/996-35-0x0000000037180000-0x0000000037212000-memory.dmp

Filesize
584KB

Download
memory/996-18-0x0000000001720000-0x0000000003AE3000-memory.dmp

Filesize
35.8MB

Download
memory/996-31-0x00000000004C0000-0x0000000001714000-memory.dmp

Filesize
18.3MB

Download
memory/996-32-0x00000000004C0000-0x00000000004DE000-memory.dmp

Filesize
120KB

Download
memory/996-33-0x0000000036700000-0x0000000036CA4000-memory.dmp

Filesize
5.6MB

Download
memory/996-34-0x0000000036CF0000-0x0000000036D8C000-memory.dmp

Filesize
624KB

Download
memory/996-37-0x0000000037220000-0x0000000037270000-memory.dmp

Filesize
320KB

Download
memory/996-38-0x0000000001720000-0x0000000003AE3000-memory.dmp

Filesize
35.8MB

Download
memory/996-39-0x0000000037380000-0x0000000037542000-memory.dmp

Filesize
1.8MB

Download
memory/996-40-0x0000000037610000-0x000000003761A000-memory.dmp

Filesize
40KB

Download
memory/2084-16-0x0000000076E91000-0x0000000076FB1000-memory.dmp

Filesize
1.1MB

Download
memory/2084-17-0x00000000032B0000-0x0000000005673000-memory.dmp

Filesize
35.8MB

Download
memory/2084-15-0x00000000032B0000-0x0000000005673000-memory.dmp

Filesize
35.8MB

Download