guloader | eccc0b1a8a0cc1fa0ecc235f09a927349f20330751c8f0f87fc977b7b5763d1f

Analysis

max time kernel
138s
max time network
190s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30/10/2024, 01:20

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General

Target
Papmlken.exe
Size 897KB
Sample241030-bqdhbasldy
SHA256 d015e6ce88f2d44bacf7b9d17d1341d071835570263c5c87dbf12e7674b2597a
MD5 f7861077df1c126558e396dd2011ef6b
SHA1 c8e5a886a2fde8a2d1c4b55d2521855afc8a978b
SHA512 d012a8e962e68ffcb482a67957d199e00090774b5501f8bb8eb5e6402283eae2b481369187c0a0ffc9fee9a3fdc55827b4625e6ec9e66d1f2bb48b181eb077ea
SSDEEP 24576:Ax+ra+8DOCqv2LqoAzIusXT62HnQIQMOKOaeKx:Ax+2+8DEuLqFzeXm2HTzOKOwx
MD5 SHA1 SHA512 SSDEEP

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

pid	Process
1056	Papmlken.exe
1056	Papmlken.exe

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

Web Service

T1102

flow	ioc
28	drive.google.com
29	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2744	Papmlken.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1056	Papmlken.exe
2744	Papmlken.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1056 set thread context of 2744	1056	Papmlken.exe	96

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Reoil.mul	Papmlken.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Spodium39.int	Papmlken.exe
File opened for modification	C:\Windows\Belringernes\Dermatophony.ini	Papmlken.exe
File opened for modification	C:\Windows\resources\nringsmiddelet.ini	Papmlken.exe
File opened for modification	C:\Windows\resources\stenhjsplanternes\fordreves.ini	Papmlken.exe
File opened for modification	C:\Windows\Fonts\karrooers.ini	Papmlken.exe
File opened for modification	C:\Windows\Fonts\brunsttiderne.tri	Papmlken.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	Papmlken.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Papmlken.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe
2744	Papmlken.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1056	Papmlken.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 2744	1056	Papmlken.exe	96
PID 1056 wrote to memory of 2744	1056	Papmlken.exe	96
PID 1056 wrote to memory of 2744	1056	Papmlken.exe	96
PID 1056 wrote to memory of 2744	1056	Papmlken.exe	96
PID 1056 wrote to memory of 2744	1056	Papmlken.exe	96

C:\Users\Admin\AppData\Local\Temp\Papmlken.exe
"C:\Users\Admin\AppData\Local\Temp\Papmlken.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:1056
- C:\Users\Admin\AppData\Local\Temp\Papmlken.exe
  "C:\Users\Admin\AppData\Local\Temp\Papmlken.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsjDC86.tmp\System.dll
Size 11KB
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b
SSDEEP 192:cPtkumJX7zBE2kGwfy9S9VkPsFQ1MZ1c:N7O2k5q9wA1MZa
MD5 SHA1 SHA512 SSDEEP

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memory/1056-18-0x0000000003190000-0x0000000005481000-memory.dmp

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memory/1056-19-0x0000000077D61000-0x0000000077E81000-memory.dmp

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memory/1056-20-0x0000000003190000-0x0000000005481000-memory.dmp

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memory/2744-21-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/2744-22-0x0000000001660000-0x0000000003951000-memory.dmp

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memory/2744-35-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/2744-36-0x0000000001660000-0x0000000003951000-memory.dmp

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memory/2744-37-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/2744-38-0x0000000077D61000-0x0000000077E81000-memory.dmp

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memory/2744-41-0x0000000000400000-0x0000000001654000-memory.dmp

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