guloader | 487f4dd9bdbe94a9cf1a04a8fdec19f16f86864d05d06f0511544b3ff68c850c

Resubmissions

13/04/2025, 09:55

250413-lx71lstjt7 10

13/04/2025, 09:52

250413-lv39mstvbz 10

13/04/2025, 07:04

250413-hv884s1vd1 10

Analysis

max time kernel
23s
max time network
23s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
13/04/2025, 09:55

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Report Analysis Logs

General

Target

virusshare/3/VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
Size

64KB
MD5

4aa5734fe9c86184f931f4ddaf2d4d7b
SHA1

a066ccad76f3c63d053cd68ac8692d4f4acf82ac
SHA256

2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa
SHA512

7355ffd3fc59af49af1d57f5327c7442a12c8e5ddc6ec9e176cc27fd4986cd6182f5f6ce91f892c07029efcac37f90d4dd077b6bb226b54c40621b94987a044c
SSDEEP

384:rdP9JIA7uJ1wK2xBpHbVbl+NGYD90pSCfZziEKffhaekBfdReVwoGHdRsArr2rOR:R9JIqNl/SSrrpBfiIdRsorZucnjtsq

Score

10^/10

guloader discovery downloader persistence

Malware Config

Extracted

Family

guloader

https://eficadgdl.com/well/Omitted-Credentials_encrypted_6A17930.bin

xor.base64

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
4880	erythroph.exe
4692	erythroph.exe
5752	erythroph.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

pid	Process
4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
732	RegAsm.exe
4880	erythroph.exe
4400	RegAsm.exe
4692	erythroph.exe
5344	RegAsm.exe
5752	erythroph.exe
1456	RegAsm.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4736 set thread context of 732	4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4880 set thread context of 4400	4880	erythroph.exe	98
PID 4692 set thread context of 5344	4692	erythroph.exe	105
PID 5752 set thread context of 1456	5752	erythroph.exe	111

System Location Discovery: System Language Discovery 1 TTPs 8 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	erythroph.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	erythroph.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	erythroph.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 10 IoCs

pid	Process
4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
4880	erythroph.exe
4880	erythroph.exe
4880	erythroph.exe
4880	erythroph.exe
4880	erythroph.exe
4692	erythroph.exe
4692	erythroph.exe
5752	erythroph.exe
5752	erythroph.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
4880	erythroph.exe
4692	erythroph.exe
5752	erythroph.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 732	4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4736 wrote to memory of 732	4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4736 wrote to memory of 732	4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4736 wrote to memory of 732	4736	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 5712 wrote to memory of 4880	5712	cmd.exe	91
PID 5712 wrote to memory of 4880	5712	cmd.exe	91
PID 5712 wrote to memory of 4880	5712	cmd.exe	91
PID 4880 wrote to memory of 5028	4880	erythroph.exe	94
PID 4880 wrote to memory of 5028	4880	erythroph.exe	94
PID 4880 wrote to memory of 5028	4880	erythroph.exe	94
PID 4880 wrote to memory of 3484	4880	erythroph.exe	95
PID 4880 wrote to memory of 3484	4880	erythroph.exe	95
PID 4880 wrote to memory of 3484	4880	erythroph.exe	95
PID 4880 wrote to memory of 5840	4880	erythroph.exe	96
PID 4880 wrote to memory of 5840	4880	erythroph.exe	96
PID 4880 wrote to memory of 5840	4880	erythroph.exe	96
PID 4880 wrote to memory of 4344	4880	erythroph.exe	97
PID 4880 wrote to memory of 4344	4880	erythroph.exe	97
PID 4880 wrote to memory of 4344	4880	erythroph.exe	97
PID 4880 wrote to memory of 4400	4880	erythroph.exe	98
PID 4880 wrote to memory of 4400	4880	erythroph.exe	98
PID 4880 wrote to memory of 4400	4880	erythroph.exe	98
PID 4880 wrote to memory of 4400	4880	erythroph.exe	98
PID 4484 wrote to memory of 4692	4484	cmd.exe	103
PID 4484 wrote to memory of 4692	4484	cmd.exe	103
PID 4484 wrote to memory of 4692	4484	cmd.exe	103
PID 4692 wrote to memory of 4444	4692	erythroph.exe	104
PID 4692 wrote to memory of 4444	4692	erythroph.exe	104
PID 4692 wrote to memory of 4444	4692	erythroph.exe	104
PID 4692 wrote to memory of 5344	4692	erythroph.exe	105
PID 4692 wrote to memory of 5344	4692	erythroph.exe	105
PID 4692 wrote to memory of 5344	4692	erythroph.exe	105
PID 4692 wrote to memory of 5344	4692	erythroph.exe	105
PID 4608 wrote to memory of 5752	4608	cmd.exe	109
PID 4608 wrote to memory of 5752	4608	cmd.exe	109
PID 4608 wrote to memory of 5752	4608	cmd.exe	109
PID 5752 wrote to memory of 4800	5752	erythroph.exe	110
PID 5752 wrote to memory of 4800	5752	erythroph.exe	110
PID 5752 wrote to memory of 4800	5752	erythroph.exe	110
PID 5752 wrote to memory of 1456	5752	erythroph.exe	111
PID 5752 wrote to memory of 1456	5752	erythroph.exe	111
PID 5752 wrote to memory of 1456	5752	erythroph.exe	111
PID 5752 wrote to memory of 1456	5752	erythroph.exe	111

C:\Users\Admin\AppData\Local\Temp\virusshare\3\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
"C:\Users\Admin\AppData\Local\Temp\virusshare\3\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\virusshare\3\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:732

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:5712
- C:\Users\Admin\TROFFE\erythroph.exe
  C:\Users\Admin\TROFFE\erythroph.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4880
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5028
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3484
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5840
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4344
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    - Adds Run key to start application
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    PID:4400

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:4484
- C:\Users\Admin\TROFFE\erythroph.exe
  C:\Users\Admin\TROFFE\erythroph.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4692
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4444
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    - Adds Run key to start application
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    PID:5344

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:4608
- C:\Users\Admin\TROFFE\erythroph.exe
  C:\Users\Admin\TROFFE\erythroph.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5752
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4800
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    - Adds Run key to start application
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    PID:1456

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\TROFFE\erythroph.exe

Filesize
64KB

MD5
4aa5734fe9c86184f931f4ddaf2d4d7b

SHA1
a066ccad76f3c63d053cd68ac8692d4f4acf82ac

SHA256
2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

SHA512
7355ffd3fc59af49af1d57f5327c7442a12c8e5ddc6ec9e176cc27fd4986cd6182f5f6ce91f892c07029efcac37f90d4dd077b6bb226b54c40621b94987a044c

Download Submit
memory/732-4-0x0000000000F60000-0x0000000001060000-memory.dmp

Filesize
1024KB

Download
memory/732-5-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/732-23-0x0000000000F60000-0x0000000001060000-memory.dmp

Filesize
1024KB

Download
memory/4400-14-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/4400-25-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/4736-22-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/4736-21-0x00000000021E0000-0x00000000021E8000-memory.dmp

Filesize
32KB

Download
memory/4736-2-0x00000000021E0000-0x00000000021E8000-memory.dmp

Filesize
32KB

Download
memory/4736-3-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/4880-13-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/4880-12-0x0000000000660000-0x0000000000668000-memory.dmp

Filesize
32KB

Download
memory/4880-24-0x0000000000660000-0x0000000000668000-memory.dmp

Filesize
32KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads