guloader | 28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d

General

Target

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
Size

242KB
MD5

bd85503dd4bb3ccd9c6c294d3767d8e6
SHA1

d98455443474b9aef06f1bff242a52e8bb4ec6d0
SHA256

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d
SHA512

b6eeaa15f7c6573ec15208bc071d1d953404c7bd3cd06e4bd0cb2ab93e7678eb2c7425c7fe317c5f0e7f5fc9145cb14686c8157b5a0ab0b6e8a00bd6b0e2972d
SSDEEP

6144:oIw3gEzFzShNZA1lZqrq6DHSCf7NVMf/WB/UvuEIN:jA2Ha172xSE7LMXWlUvuES

Score

10^/10

guloader discovery downloader persistence

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

caspol.exe28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

Loads dropped DLL 49 IoCs

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

pid	process
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

caspol.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Handselling = "C:\\Users\\Admin\\AppData\\Local\\Temp\\sekstenaarig\\Lerduer.exe"	caspol.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.execaspol.exe

pid process

2136 28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
3172 caspol.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

description	pid	process	target process
PID 2136 set thread context of 3172	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.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

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.execaspol.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	caspol.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

pid	process
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe

description	pid	process	target process
PID 2136 wrote to memory of 2552	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 2552	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 2552	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 3172	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 3172	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 3172	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe
PID 2136 wrote to memory of 3172	2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe	caspol.exe

C:\Users\Admin\AppData\Local\Temp\28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
"C:\Users\Admin\AppData\Local\Temp\28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe"
  2⤵
  PID:2552
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsr9647.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/2136-154-0x0000000003380000-0x000000000409E000-memory.dmp

Filesize
13.1MB

Download
memory/2136-155-0x0000000003380000-0x000000000409E000-memory.dmp

Filesize
13.1MB

Download
memory/2136-156-0x0000000077771000-0x0000000077891000-memory.dmp

Filesize
1.1MB

Download
memory/2136-157-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2136-158-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/3172-159-0x0000000000FA0000-0x0000000001CBE000-memory.dmp

Filesize
13.1MB

Download
memory/3172-160-0x00000000777F8000-0x00000000777F9000-memory.dmp

Filesize
4KB

Download
memory/3172-162-0x0000000077771000-0x0000000077891000-memory.dmp

Filesize
1.1MB

Download
memory/3172-163-0x0000000000FA0000-0x0000000001CBE000-memory.dmp

Filesize
13.1MB

Download
memory/3172-164-0x0000000000400000-0x000000000062B000-memory.dmp

Filesize
2.2MB

Download

pid	process
2136	28dbe1a424619df840d06cebb87f8d08649a37db58e1c2e51ab25c84aa31701d.exe
3172	caspol.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads