guloader | 736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b

General

Target

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
Size

908KB
MD5

a2c65cc4cb9e9c54c87d8ff854e57c09
SHA1

b186277230369f52d20aecc762e7979cc887592d
SHA256

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b
SHA512

d23f3378b2b5704fb2d5409a391f0d23529aaed74b907608563b1788c7ea9f16218cb7623471e8f587c743bc93254b49213599106fc4742d10040f0eee1374e3
SSDEEP

24576:rx+re/u66cbmHoAzh5ynvyX62HnQIQMOKOaeK:rx+SF6CyFzqvyq2HTzOKOw

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid	process
5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

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

Web Service
T1102

Processes:

flow ioc

14 drive.google.com
15 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid process

4144 736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

flow	ioc
14	drive.google.com
15	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid	process
5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
4144	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

description	pid	process	target process
PID 5116 set thread context of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Drops file in Program Files directory 1 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\Reoil.mul	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Drops file in Windows directory 6 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\Spodium39.int	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
File opened for modification	C:\Windows\Belringernes\Dermatophony.ini	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
File opened for modification	C:\Windows\resources\nringsmiddelet.ini	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
File opened for modification	C:\Windows\resources\stenhjsplanternes\fordreves.ini	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
File opened for modification	C:\Windows\Fonts\karrooers.ini	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
File opened for modification	C:\Windows\Fonts\brunsttiderne.tri	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4728 4144 WerFault.exe 736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid	pid_target	process	target process
4728	4144	WerFault.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

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

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid	process
4144	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
4144	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

pid process

5116 736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

description	pid	process	target process
PID 5116 wrote to memory of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
PID 5116 wrote to memory of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
PID 5116 wrote to memory of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
PID 5116 wrote to memory of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
PID 5116 wrote to memory of 4144	5116	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe	736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe

C:\Users\Admin\AppData\Local\Temp\736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
"C:\Users\Admin\AppData\Local\Temp\736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5116
- C:\Users\Admin\AppData\Local\Temp\736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe
  "C:\Users\Admin\AppData\Local\Temp\736c7e43912f503e8c2a91a5f64c95ee3f1f817d20acbb306fba3eb9b83ba24b.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4144
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4144 -s 1740
    3⤵
    - Program crash
    PID:4728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4144 -ip 4144
1⤵
PID:1988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nspAB16.tmp\System.dll

Filesize
11KB

MD5
c9473cb90d79a374b2ba6040ca16e45c

SHA1
ab95b54f12796dce57210d65f05124a6ed81234a

SHA256
b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

SHA512
eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

Download Submit
memory/4144-39-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-22-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-40-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4144-42-0x0000000077D11000-0x0000000077E31000-memory.dmp

Filesize
1.1MB

Download
memory/4144-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-23-0x0000000001660000-0x000000000228F000-memory.dmp

Filesize
12.2MB

Download
memory/4144-24-0x0000000077D98000-0x0000000077D99000-memory.dmp

Filesize
4KB

Download
memory/4144-25-0x0000000077DB5000-0x0000000077DB6000-memory.dmp

Filesize
4KB

Download
memory/4144-38-0x0000000001660000-0x000000000228F000-memory.dmp

Filesize
12.2MB

Download
memory/4144-51-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4144-50-0x0000000001660000-0x000000000228F000-memory.dmp

Filesize
12.2MB

Download
memory/4144-48-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-47-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-43-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4144-44-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-45-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4144-46-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/5116-21-0x0000000003230000-0x0000000003E5F000-memory.dmp

Filesize
12.2MB

Download
memory/5116-19-0x0000000077D11000-0x0000000077E31000-memory.dmp

Filesize
1.1MB

Download
memory/5116-20-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/5116-18-0x0000000003230000-0x0000000003E5F000-memory.dmp

Filesize
12.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads