guloader | 05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d

Analysis

max time kernel
148s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2024 02:02

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General

Target

05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
Size

717KB
MD5

143edb6c5c1e1a1e06695965f2b5cb74
SHA1

b43660357dbe4c3d84d4239b6273817b5eb1ff53
SHA256

05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d
SHA512

8656e2e854a66f2901898147303fa5119c691defc06745d38d93ce0ef06ff243d85b8d0d109d0ef18c4bb3b1de29a5c76961b85a77959c0d93b9179546bbe761
SSDEEP

12288:xlYZmcRHOohpeGbzpAbzRglY6y/utl97avDAoXPJO2RpXD3j:UmcdOohMyz5Y6yK7arHXPJOyXjj

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
3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.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-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

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

Web Service

T1102

flow	ioc
18	drive.google.com
17	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
33	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
5080	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
5080	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3544 set thread context of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89

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: EnumeratesProcesses 1 IoCs

pid	Process
5080	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3544 wrote to memory of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89
PID 3544 wrote to memory of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89
PID 3544 wrote to memory of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89
PID 3544 wrote to memory of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89
PID 3544 wrote to memory of 5080	3544	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe

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:3544
- C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.exe
  "C:\Users\Admin\AppData\Local\Temp\05814550e1562d4c54710804145c678b6191aab6a07c73e6f7902b1149bb020d.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:5080

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\nskF8F8.tmp\System.dll

Filesize
11KB

MD5
fc90dfb694d0e17b013d6f818bce41b0

SHA1
3243969886d640af3bfa442728b9f0dff9d5f5b0

SHA256
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528

SHA512
324f13aa7a33c6408e2a57c3484d1691ecee7c3c1366de2bb8978c8dc66b18425d8cab5a32d1702c13c43703e36148a022263de7166afdce141da2b01169f1c6

Download Submit
memory/3544-15-0x00000000032C0000-0x0000000005F85000-memory.dmp

Filesize
44.8MB

Download
memory/3544-16-0x0000000077DD1000-0x0000000077EF1000-memory.dmp

Filesize
1.1MB

Download
memory/3544-17-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3544-18-0x00000000032C0000-0x0000000005F85000-memory.dmp

Filesize
44.8MB

Download
memory/5080-19-0x0000000001710000-0x00000000043D5000-memory.dmp

Filesize
44.8MB

Download
memory/5080-32-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/5080-33-0x00000000004B0000-0x00000000004CE000-memory.dmp

Filesize
120KB

Download
memory/5080-34-0x0000000037100000-0x00000000376A4000-memory.dmp

Filesize
5.6MB

Download
memory/5080-35-0x0000000034D30000-0x0000000034DCC000-memory.dmp

Filesize
624KB

Download
memory/5080-37-0x0000000001710000-0x00000000043D5000-memory.dmp

Filesize
44.8MB

Download
memory/5080-38-0x0000000037AA0000-0x0000000037B32000-memory.dmp

Filesize
584KB

Download
memory/5080-39-0x0000000037B40000-0x0000000037B90000-memory.dmp

Filesize
320KB

Download
memory/5080-40-0x0000000037CB0000-0x0000000037E72000-memory.dmp

Filesize
1.8MB

Download
memory/5080-41-0x0000000037F40000-0x0000000037F4A000-memory.dmp

Filesize
40KB

Download