guloader | 49847b4c6e5cccca50beccf23260cac3d3446feb0692cd113302b2fcaccbbefe

General

Target

FAKTURA 012025.exe
Size

743KB
MD5

92bca263fe2c4f6d7621457b5a758854
SHA1

81b5228c17dbcde2803f07e68fc2aeae907e2cf4
SHA256

49847b4c6e5cccca50beccf23260cac3d3446feb0692cd113302b2fcaccbbefe
SHA512

de9dea96a5d438f780a3e46fe3bdf0ab77f2f2131eeb2b01cbf98d69a573e3b0af994ed89e506725c0d14465001eb5f7660a4161a05995d1d6491929e32a538c
SSDEEP

12288:dT58++c2/p0FdmxxSKA+Rh8LYHjmLmyj/fzPzTyWaLj0wclOp24g/KHZJ:dT58+86wxx5A+Rh2YDmtHzTI30Mp7J

Score

10^/10

guloader collection discovery downloader spyware stealer

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
3060	FAKTURA 012025.exe
3060	FAKTURA 012025.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-1-5-21-2211717155-842865201-3404093980-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FAKTURA 012025.exe
Key opened	\REGISTRY\USER\S-1-5-21-2211717155-842865201-3404093980-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FAKTURA 012025.exe
Key opened	\REGISTRY\USER\S-1-5-21-2211717155-842865201-3404093980-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FAKTURA 012025.exe

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

Web Service

T1102

flow	ioc
21	drive.google.com
22	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
36	reallyfreegeoip.org
32	checkip.dyndns.org
35	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4696	FAKTURA 012025.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3060	FAKTURA 012025.exe
4696	FAKTURA 012025.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	FAKTURA 012025.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAKTURA 012025.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4696	FAKTURA 012025.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3060	FAKTURA 012025.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4696	FAKTURA 012025.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 4696	3060	FAKTURA 012025.exe	88
PID 3060 wrote to memory of 4696	3060	FAKTURA 012025.exe	88
PID 3060 wrote to memory of 4696	3060	FAKTURA 012025.exe	88
PID 3060 wrote to memory of 4696	3060	FAKTURA 012025.exe	88

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2211717155-842865201-3404093980-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FAKTURA 012025.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2211717155-842865201-3404093980-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	FAKTURA 012025.exe

C:\Users\Admin\AppData\Local\Temp\FAKTURA 012025.exe
"C:\Users\Admin\AppData\Local\Temp\FAKTURA 012025.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Local\Temp\FAKTURA 012025.exe
  "C:\Users\Admin\AppData\Local\Temp\FAKTURA 012025.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:4696

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

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\nszC555.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
memory/3060-16-0x0000000004990000-0x00000000055FA000-memory.dmp

Filesize
12.4MB

Download
memory/3060-17-0x0000000077B11000-0x0000000077C31000-memory.dmp

Filesize
1.1MB

Download
memory/3060-18-0x00000000747F5000-0x00000000747F6000-memory.dmp

Filesize
4KB

Download
memory/3060-20-0x0000000004990000-0x00000000055FA000-memory.dmp

Filesize
12.4MB

Download
memory/4696-21-0x0000000001830000-0x000000000249A000-memory.dmp

Filesize
12.4MB

Download
memory/4696-22-0x0000000077B98000-0x0000000077B99000-memory.dmp

Filesize
4KB

Download
memory/4696-23-0x0000000077BB5000-0x0000000077BB6000-memory.dmp

Filesize
4KB

Download
memory/4696-36-0x0000000001830000-0x000000000249A000-memory.dmp

Filesize
12.4MB

Download
memory/4696-38-0x0000000077B11000-0x0000000077C31000-memory.dmp

Filesize
1.1MB

Download
memory/4696-37-0x00000000005D0000-0x0000000001824000-memory.dmp

Filesize
18.3MB

Download
memory/4696-39-0x0000000001830000-0x000000000249A000-memory.dmp

Filesize
12.4MB

Download
memory/4696-40-0x00000000005D0000-0x00000000005EE000-memory.dmp

Filesize
120KB

Download
memory/4696-41-0x0000000035350000-0x00000000358F4000-memory.dmp

Filesize
5.6MB

Download
memory/4696-42-0x0000000032FE0000-0x000000003307C000-memory.dmp

Filesize
624KB

Download
memory/4696-44-0x0000000035B40000-0x0000000035B90000-memory.dmp

Filesize
320KB

Download
memory/4696-45-0x0000000035CB0000-0x0000000035E72000-memory.dmp

Filesize
1.8MB

Download
memory/4696-49-0x0000000032B30000-0x0000000032BC2000-memory.dmp

Filesize
584KB

Download
memory/4696-50-0x0000000032BF0000-0x0000000032BFA000-memory.dmp

Filesize
40KB

Download

Analysis

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