guloader | 2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

Analysis

max time kernel
299s
max time network
296s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2025, 18:07

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General

Target

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
2376	erythroph.exe
3260	erythroph.exe
4624	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-1-5-21-1279544337-3716153908-718418795-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

pid	Process
2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
1368	RegAsm.exe
2376	erythroph.exe
2760	RegAsm.exe
3260	erythroph.exe
4400	RegAsm.exe
4624	erythroph.exe
1332	RegAsm.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2832 set thread context of 1368	2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2376 set thread context of 2760	2376	erythroph.exe	92
PID 3260 set thread context of 4400	3260	erythroph.exe	98
PID 4624 set thread context of 1332	4624	erythroph.exe	105

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	erythroph.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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	erythroph.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
2376	erythroph.exe
3260	erythroph.exe
3260	erythroph.exe
4624	erythroph.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
2376	erythroph.exe
3260	erythroph.exe
4624	erythroph.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2832 wrote to memory of 1368	2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2832 wrote to memory of 1368	2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2832 wrote to memory of 1368	2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2832 wrote to memory of 1368	2832	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4608 wrote to memory of 2376	4608	cmd.exe	91
PID 4608 wrote to memory of 2376	4608	cmd.exe	91
PID 4608 wrote to memory of 2376	4608	cmd.exe	91
PID 2376 wrote to memory of 2760	2376	erythroph.exe	92
PID 2376 wrote to memory of 2760	2376	erythroph.exe	92
PID 2376 wrote to memory of 2760	2376	erythroph.exe	92
PID 2376 wrote to memory of 2760	2376	erythroph.exe	92
PID 964 wrote to memory of 3260	964	cmd.exe	96
PID 964 wrote to memory of 3260	964	cmd.exe	96
PID 964 wrote to memory of 3260	964	cmd.exe	96
PID 3260 wrote to memory of 4736	3260	erythroph.exe	97
PID 3260 wrote to memory of 4736	3260	erythroph.exe	97
PID 3260 wrote to memory of 4736	3260	erythroph.exe	97
PID 3260 wrote to memory of 4400	3260	erythroph.exe	98
PID 3260 wrote to memory of 4400	3260	erythroph.exe	98
PID 3260 wrote to memory of 4400	3260	erythroph.exe	98
PID 3260 wrote to memory of 4400	3260	erythroph.exe	98
PID 4488 wrote to memory of 4624	4488	cmd.exe	102
PID 4488 wrote to memory of 4624	4488	cmd.exe	102
PID 4488 wrote to memory of 4624	4488	cmd.exe	102
PID 4624 wrote to memory of 1332	4624	erythroph.exe	105
PID 4624 wrote to memory of 1332	4624	erythroph.exe	105
PID 4624 wrote to memory of 1332	4624	erythroph.exe	105
PID 4624 wrote to memory of 1332	4624	erythroph.exe	105

C:\Users\Admin\AppData\Local\Temp\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
"C:\Users\Admin\AppData\Local\Temp\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:2832
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1368

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:2376
- - 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:2760

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:964
- 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:3260
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4736
- - 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:4488
- 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:4624
- - 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:1332

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/1332-26-0x0000000074E40000-0x00000000750C4000-memory.dmp

Filesize
2.5MB

Download
memory/1368-22-0x0000000001000000-0x0000000001100000-memory.dmp

Filesize
1024KB

Download
memory/1368-5-0x0000000077B21000-0x0000000077C41000-memory.dmp

Filesize
1.1MB

Download
memory/1368-4-0x0000000001000000-0x0000000001100000-memory.dmp

Filesize
1024KB

Download
memory/2376-28-0x00000000020B0000-0x00000000020B8000-memory.dmp

Filesize
32KB

Download
memory/2376-12-0x00000000020B0000-0x00000000020B8000-memory.dmp

Filesize
32KB

Download
memory/2376-13-0x0000000077B21000-0x0000000077C41000-memory.dmp

Filesize
1.1MB

Download
memory/2376-23-0x00000000020B0000-0x00000000020B8000-memory.dmp

Filesize
32KB

Download
memory/2760-24-0x0000000074E40000-0x00000000750C4000-memory.dmp

Filesize
2.5MB

Download
memory/2760-25-0x0000000000D00000-0x0000000000E00000-memory.dmp

Filesize
1024KB

Download
memory/2760-14-0x0000000000D00000-0x0000000000E00000-memory.dmp

Filesize
1024KB

Download
memory/2832-21-0x0000000000720000-0x0000000000728000-memory.dmp

Filesize
32KB

Download
memory/2832-2-0x0000000000720000-0x0000000000728000-memory.dmp

Filesize
32KB

Download
memory/2832-27-0x0000000000720000-0x0000000000728000-memory.dmp

Filesize
32KB

Download
memory/2832-3-0x0000000077B21000-0x0000000077C41000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads