guloader | 25c047be782f1c95576aa6c3cdae9fa1a263fc63fe12851a13013dd7ce067286

General

Target

leping-pdf.exe
Size

810KB
MD5

4dbd532f919ce1dbf60457cca8305137
SHA1

7daa026d598d7c916006e81701db3f791dc2188b
SHA256

b93de10f4d570997495e31de612f6ff52303dd0c488708b933ae02c2bdd8e274
SHA512

89a073fe4363ad01684bd80d800faf54d04d8b2e1f1c2e26546300be248aff6f3156f7bea7053f5947113fe288ae70e86aa6ca346b5fbd4c3b8eca866a956054
SSDEEP

24576:mdYN58vv/f+yQMUJ6Ailn6b/HlSgxgam9uSaviZtXv:mc5IvnfQN6yldjNtvw

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 1 IoCs

pid	Process
5952	leping-pdf.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2112	leping-pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5952	leping-pdf.exe
2112	leping-pdf.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	leping-pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	leping-pdf.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5952	leping-pdf.exe
2112	leping-pdf.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe
2112	leping-pdf.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5952	leping-pdf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5952 wrote to memory of 2112	5952	leping-pdf.exe	105
PID 5952 wrote to memory of 2112	5952	leping-pdf.exe	105
PID 5952 wrote to memory of 2112	5952	leping-pdf.exe	105
PID 5952 wrote to memory of 2112	5952	leping-pdf.exe	105

C:\Users\Admin\AppData\Local\Temp\leping-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\leping-pdf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5952
- C:\Users\Admin\AppData\Local\Temp\leping-pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\leping-pdf.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2112

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsp9D85.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/2112-40-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-39-0x0000000076F21000-0x0000000077041000-memory.dmp

Filesize
1.1MB

Download
memory/2112-48-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-44-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-43-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-32-0x0000000076FA8000-0x0000000076FA9000-memory.dmp

Filesize
4KB

Download
memory/2112-33-0x0000000001660000-0x0000000002167000-memory.dmp

Filesize
11.0MB

Download
memory/2112-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-42-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-38-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2112-37-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/2112-36-0x0000000001660000-0x0000000002167000-memory.dmp

Filesize
11.0MB

Download
memory/2112-34-0x0000000076FC5000-0x0000000076FC6000-memory.dmp

Filesize
4KB

Download
memory/2112-41-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/5952-25-0x0000000004E00000-0x0000000005907000-memory.dmp

Filesize
11.0MB

Download
memory/5952-26-0x0000000076F21000-0x0000000077041000-memory.dmp

Filesize
1.1MB

Download
memory/5952-30-0x0000000004E00000-0x0000000005907000-memory.dmp

Filesize
11.0MB

Download
memory/5952-28-0x0000000004E00000-0x0000000005907000-memory.dmp

Filesize
11.0MB

Download
memory/5952-27-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download

Analysis

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