guloader | eccc0b1a8a0cc1fa0ecc235f09a927349f20330751c8f0f87fc977b7b5763d1f

General

Target

Papmlken.exe
Size

897KB
MD5

f7861077df1c126558e396dd2011ef6b
SHA1

c8e5a886a2fde8a2d1c4b55d2521855afc8a978b
SHA256

d015e6ce88f2d44bacf7b9d17d1341d071835570263c5c87dbf12e7674b2597a
SHA512

d012a8e962e68ffcb482a67957d199e00090774b5501f8bb8eb5e6402283eae2b481369187c0a0ffc9fee9a3fdc55827b4625e6ec9e66d1f2bb48b181eb077ea
SSDEEP

24576:Ax+ra+8DOCqv2LqoAzIusXT62HnQIQMOKOaeKx:Ax+2+8DEuLqFzeXm2HTzOKOwx

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
2108	Papmlken.exe
2108	Papmlken.exe

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

Web Service

T1102

flow	ioc
26	drive.google.com
27	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
748	Papmlken.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2108	Papmlken.exe
748	Papmlken.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2108 set thread context of 748	2108	Papmlken.exe	97

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\brunsttiderne.tri	Papmlken.exe
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

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
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe
748	Papmlken.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2108	Papmlken.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 748	2108	Papmlken.exe	97
PID 2108 wrote to memory of 748	2108	Papmlken.exe	97
PID 2108 wrote to memory of 748	2108	Papmlken.exe	97
PID 2108 wrote to memory of 748	2108	Papmlken.exe	97
PID 2108 wrote to memory of 748	2108	Papmlken.exe	97

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:2108
- 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:748

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nscB259.tmp\System.dll

Filesize
11KB

MD5
c9473cb90d79a374b2ba6040ca16e45c

SHA1
ab95b54f12796dce57210d65f05124a6ed81234a

SHA256
b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

SHA512
eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

Download Submit
memory/748-38-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/748-23-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/748-24-0x0000000001660000-0x0000000003951000-memory.dmp

Filesize
34.9MB

Download
memory/748-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/748-39-0x0000000001660000-0x0000000003951000-memory.dmp

Filesize
34.9MB

Download
memory/748-40-0x00000000773C1000-0x00000000774E1000-memory.dmp

Filesize
1.1MB

Download
memory/748-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/748-44-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2108-19-0x0000000003190000-0x0000000005481000-memory.dmp

Filesize
34.9MB

Download
memory/2108-21-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2108-20-0x00000000773C1000-0x00000000774E1000-memory.dmp

Filesize
1.1MB

Download
memory/2108-22-0x0000000003190000-0x0000000005481000-memory.dmp

Filesize
34.9MB

Download
memory/2108-18-0x0000000003190000-0x0000000005481000-memory.dmp

Filesize
34.9MB

Download

Analysis

Sharing