guloader | 0a64a9727e5c4436ce21fd843f736bb4d6bdc27bb15dea0fb31ab5c0672385b9

General

Target

Franskundervisning.exe
Size

1.0MB
MD5

6b862962db7aa037aaf704b74ac980f7
SHA1

2ab59b2a03355a184f12b979f3a26394b704399e
SHA256

fb92c92a5bf23b37795192ed7ef4dfa48b20a65df3ff7356b43d288cad204db8
SHA512

c6f5ae5995a79b6961285b0a547addaf0f96e3de45e1efb83ed818489a1ac1c643abc4b6253d186604081570327b166462e090562a32fea62c14392efe2656c6
SSDEEP

24576:LzOEC045b5peE7OxD8NCdaNcsYTNG5HgapN:eEeZXeEaxILAcNgE

Score

10^/10

guloader defense_evasion discovery downloader evasion spyware stealer trojan

Malware Config

Signatures

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

Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 1 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	Franskundervisning.exe

Disables Task Manager via registry modification
defense_evasion

Loads dropped DLL 2 IoCs

pid	Process
272	Franskundervisning.exe
272	Franskundervisning.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
3	drive.google.com
5	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
16	reallyfreegeoip.org
17	reallyfreegeoip.org
14	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2136	Franskundervisning.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
272	Franskundervisning.exe
2136	Franskundervisning.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	Franskundervisning.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Franskundervisning.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
272	Franskundervisning.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	Franskundervisning.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 272 wrote to memory of 2136	272	Franskundervisning.exe	30
PID 272 wrote to memory of 2136	272	Franskundervisning.exe	30
PID 272 wrote to memory of 2136	272	Franskundervisning.exe	30
PID 272 wrote to memory of 2136	272	Franskundervisning.exe	30
PID 272 wrote to memory of 2136	272	Franskundervisning.exe	30

C:\Users\Admin\AppData\Local\Temp\Franskundervisning.exe
"C:\Users\Admin\AppData\Local\Temp\Franskundervisning.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:272
- C:\Users\Admin\AppData\Local\Temp\Franskundervisning.exe
  "C:\Users\Admin\AppData\Local\Temp\Franskundervisning.exe"
  2⤵
  - Modifies Windows Defender DisableAntiSpyware settings
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

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

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Downloads

\Users\Admin\AppData\Local\Temp\nsy4F59.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/272-17-0x0000000002E30000-0x00000000050A7000-memory.dmp

Filesize
34.5MB

Download
memory/272-18-0x0000000076CE1000-0x0000000076DE2000-memory.dmp

Filesize
1.0MB

Download
memory/272-19-0x0000000076CE0000-0x0000000076E89000-memory.dmp

Filesize
1.7MB

Download
memory/272-21-0x0000000002E30000-0x00000000050A7000-memory.dmp

Filesize
34.5MB

Download
memory/2136-22-0x0000000076CE0000-0x0000000076E89000-memory.dmp

Filesize
1.7MB

Download
memory/2136-20-0x0000000001530000-0x00000000037A7000-memory.dmp

Filesize
34.5MB

Download
memory/2136-44-0x00000000004C0000-0x0000000001522000-memory.dmp

Filesize
16.4MB

Download
memory/2136-45-0x00000000004C0000-0x0000000001522000-memory.dmp

Filesize
16.4MB

Download
memory/2136-46-0x0000000001530000-0x00000000037A7000-memory.dmp

Filesize
34.5MB

Download
memory/2136-47-0x00000000004C0000-0x00000000004DE000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads