guloader | 2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2025, 14:29

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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
4624	erythroph.exe
2804	erythroph.exe
5624	erythroph.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3630502724-2561614198-3854231964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3630502724-2561614198-3854231964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3630502724-2561614198-3854231964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Slngkapper9 = "C:\\Users\\Admin\\TROFFE\\erythroph.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 7 IoCs

pid	Process
2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
4728	RegAsm.exe
4624	erythroph.exe
5852	RegAsm.exe
2804	erythroph.exe
1260	RegAsm.exe
5624	erythroph.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2384 set thread context of 4728	2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4624 set thread context of 5852	4624	erythroph.exe	92
PID 2804 set thread context of 1260	2804	erythroph.exe	99
PID 5624 set thread context of 5376	5624	erythroph.exe	135

System Location Discovery: System Language Discovery 1 TTPs 7 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	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	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	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe

Suspicious behavior: MapViewOfSection 33 IoCs

pid	Process
2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
4624	erythroph.exe
2804	erythroph.exe
2804	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe
5624	erythroph.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
4624	erythroph.exe
2804	erythroph.exe
5624	erythroph.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 4728	2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2384 wrote to memory of 4728	2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2384 wrote to memory of 4728	2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 2384 wrote to memory of 4728	2384	VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe	87
PID 4692 wrote to memory of 4624	4692	cmd.exe	91
PID 4692 wrote to memory of 4624	4692	cmd.exe	91
PID 4692 wrote to memory of 4624	4692	cmd.exe	91
PID 4624 wrote to memory of 5852	4624	erythroph.exe	92
PID 4624 wrote to memory of 5852	4624	erythroph.exe	92
PID 4624 wrote to memory of 5852	4624	erythroph.exe	92
PID 4624 wrote to memory of 5852	4624	erythroph.exe	92
PID 4768 wrote to memory of 2804	4768	cmd.exe	96
PID 4768 wrote to memory of 2804	4768	cmd.exe	96
PID 4768 wrote to memory of 2804	4768	cmd.exe	96
PID 2804 wrote to memory of 4796	2804	erythroph.exe	98
PID 2804 wrote to memory of 4796	2804	erythroph.exe	98
PID 2804 wrote to memory of 4796	2804	erythroph.exe	98
PID 2804 wrote to memory of 1260	2804	erythroph.exe	99
PID 2804 wrote to memory of 1260	2804	erythroph.exe	99
PID 2804 wrote to memory of 1260	2804	erythroph.exe	99
PID 2804 wrote to memory of 1260	2804	erythroph.exe	99
PID 4880 wrote to memory of 5624	4880	cmd.exe	104
PID 4880 wrote to memory of 5624	4880	cmd.exe	104
PID 4880 wrote to memory of 5624	4880	cmd.exe	104
PID 5624 wrote to memory of 3984	5624	erythroph.exe	107
PID 5624 wrote to memory of 3984	5624	erythroph.exe	107
PID 5624 wrote to memory of 3984	5624	erythroph.exe	107
PID 5624 wrote to memory of 540	5624	erythroph.exe	108
PID 5624 wrote to memory of 540	5624	erythroph.exe	108
PID 5624 wrote to memory of 540	5624	erythroph.exe	108
PID 5624 wrote to memory of 5768	5624	erythroph.exe	109
PID 5624 wrote to memory of 5768	5624	erythroph.exe	109
PID 5624 wrote to memory of 5768	5624	erythroph.exe	109
PID 5624 wrote to memory of 2108	5624	erythroph.exe	110
PID 5624 wrote to memory of 2108	5624	erythroph.exe	110
PID 5624 wrote to memory of 2108	5624	erythroph.exe	110
PID 5624 wrote to memory of 3080	5624	erythroph.exe	111
PID 5624 wrote to memory of 3080	5624	erythroph.exe	111
PID 5624 wrote to memory of 3080	5624	erythroph.exe	111
PID 5624 wrote to memory of 6068	5624	erythroph.exe	112
PID 5624 wrote to memory of 6068	5624	erythroph.exe	112
PID 5624 wrote to memory of 6068	5624	erythroph.exe	112
PID 5624 wrote to memory of 2528	5624	erythroph.exe	113
PID 5624 wrote to memory of 2528	5624	erythroph.exe	113
PID 5624 wrote to memory of 2528	5624	erythroph.exe	113
PID 5624 wrote to memory of 5584	5624	erythroph.exe	114
PID 5624 wrote to memory of 5584	5624	erythroph.exe	114
PID 5624 wrote to memory of 5584	5624	erythroph.exe	114
PID 5624 wrote to memory of 3904	5624	erythroph.exe	115
PID 5624 wrote to memory of 3904	5624	erythroph.exe	115
PID 5624 wrote to memory of 3904	5624	erythroph.exe	115
PID 5624 wrote to memory of 836	5624	erythroph.exe	116
PID 5624 wrote to memory of 836	5624	erythroph.exe	116
PID 5624 wrote to memory of 836	5624	erythroph.exe	116
PID 5624 wrote to memory of 5320	5624	erythroph.exe	117
PID 5624 wrote to memory of 5320	5624	erythroph.exe	117
PID 5624 wrote to memory of 5320	5624	erythroph.exe	117
PID 5624 wrote to memory of 1524	5624	erythroph.exe	118
PID 5624 wrote to memory of 1524	5624	erythroph.exe	118
PID 5624 wrote to memory of 1524	5624	erythroph.exe	118
PID 5624 wrote to memory of 3672	5624	erythroph.exe	119
PID 5624 wrote to memory of 3672	5624	erythroph.exe	119
PID 5624 wrote to memory of 3672	5624	erythroph.exe	119
PID 5624 wrote to memory of 2796	5624	erythroph.exe	120

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:2384
- 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:4728

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:4692
- 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:5852

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:4768
- 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:2804
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4796
- - 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:1260

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:4880
- 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:5624
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3984
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:540
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5768
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2108
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3080
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:6068
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2528
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5584
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3904
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:836
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5320
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:1524
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3672
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2796
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:3744
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:676
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5760
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5468
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5612
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2092
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:1672
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2212
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:4416
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5436
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:924
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:704
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:1136
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:2368
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    C:\Users\Admin\TROFFE\erythroph.exe
    3⤵
    PID:5376

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/2384-3-0x0000000077A61000-0x0000000077B81000-memory.dmp

Filesize
1.1MB

Download
memory/2384-2-0x0000000002BF0000-0x0000000002BF8000-memory.dmp

Filesize
32KB

Download
memory/2384-25-0x0000000002BF0000-0x0000000002BF8000-memory.dmp

Filesize
32KB

Download
memory/2384-21-0x0000000002BF0000-0x0000000002BF8000-memory.dmp

Filesize
32KB

Download
memory/4624-23-0x0000000002130000-0x0000000002138000-memory.dmp

Filesize
32KB

Download
memory/4624-26-0x0000000002130000-0x0000000002138000-memory.dmp

Filesize
32KB

Download
memory/4624-12-0x0000000002130000-0x0000000002138000-memory.dmp

Filesize
32KB

Download
memory/4624-13-0x0000000077A61000-0x0000000077B81000-memory.dmp

Filesize
1.1MB

Download
memory/4728-4-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/4728-22-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/4728-5-0x0000000077A61000-0x0000000077B81000-memory.dmp

Filesize
1.1MB

Download
memory/5852-24-0x0000000001370000-0x0000000001470000-memory.dmp

Filesize
1024KB

Download
memory/5852-14-0x0000000001370000-0x0000000001470000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads