guloader | 1ccfac0d54e9252032fbe4ebb2d47f346fa479ebd24c9bc1cece585baa6283cf

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 01:54

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General

Target
1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe
Size 563KB
Sample240501-cb3pbsdd2y
SHA256 1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010
MD5 e0d35d2fe887cbe0b4de87f1be7d7a17
SHA1 b37f59b0ec54d6c40645837dbb3a18c954346601
SHA512 9d20fd479a57ccf51c02830744f095b5dfa98707777a8f24968aa0f0e9ac2a4de4ae348831a001b00cae9d750b9372a85248fdd15570a44ca52b90f8cf451256
SSDEEP 12288:8stfWr2z5t/dtpQBEd6XT9Pi8RzDm+EYRfT7d+:8st+r2z5J9Pd6XT9Pi85REYpT7d+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader downloader persistence spyware stealer

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	Brookier.exe

Loads dropped DLL 2 IoCs

pid	Process
1396	1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe
4028	Brookier.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Unphosphatizeds = "%Recolours% -windowstyle minimized $Finpudsningen=(Get-ItemProperty -Path 'HKCU:\\Beakhead\\').Kejserrn;%Recolours% ($Finpudsningen)"	reg.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\psiloses.lnk	1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4028	Brookier.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3124	powershell.exe
4028	Brookier.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 3124 set thread context of 4028	3124	powershell.exe	89
PID 4028 set thread context of 3524	4028	Brookier.exe	56
PID 4028 set thread context of 5016	4028	Brookier.exe	95
PID 5016 set thread context of 3524	5016	cmd.exe	56
PID 5016 set thread context of 1656	5016	cmd.exe	96

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x00030000000229cb-47.dat	nsis_installer_1
behavioral2/files/0x00030000000229cb-47.dat	nsis_installer_2

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmd.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3396	reg.exe

Suspicious behavior: EnumeratesProcesses 63 IoCs

pid	Process
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
4028	Brookier.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
3124	powershell.exe
4028	Brookier.exe
3524	Explorer.EXE
3524	Explorer.EXE
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe
5016	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3124	powershell.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3524	Explorer.EXE

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1396 wrote to memory of 3124	1396	1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe	83
PID 1396 wrote to memory of 3124	1396	1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe	83
PID 1396 wrote to memory of 3124	1396	1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe	83
PID 3124 wrote to memory of 1684	3124	powershell.exe	87
PID 3124 wrote to memory of 1684	3124	powershell.exe	87
PID 3124 wrote to memory of 1684	3124	powershell.exe	87
PID 3124 wrote to memory of 4028	3124	powershell.exe	89
PID 3124 wrote to memory of 4028	3124	powershell.exe	89
PID 3124 wrote to memory of 4028	3124	powershell.exe	89
PID 3124 wrote to memory of 4028	3124	powershell.exe	89
PID 3124 wrote to memory of 4028	3124	powershell.exe	89
PID 4028 wrote to memory of 2592	4028	Brookier.exe	90
PID 4028 wrote to memory of 2592	4028	Brookier.exe	90
PID 4028 wrote to memory of 2592	4028	Brookier.exe	90
PID 2592 wrote to memory of 3396	2592	cmd.exe	92
PID 2592 wrote to memory of 3396	2592	cmd.exe	92
PID 2592 wrote to memory of 3396	2592	cmd.exe	92
PID 3524 wrote to memory of 5016	3524	Explorer.EXE	95
PID 3524 wrote to memory of 5016	3524	Explorer.EXE	95
PID 3524 wrote to memory of 5016	3524	Explorer.EXE	95
PID 5016 wrote to memory of 1656	5016	cmd.exe	96
PID 5016 wrote to memory of 1656	5016	cmd.exe	96

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3524
- C:\Users\Admin\AppData\Local\Temp\1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe
  "C:\Users\Admin\AppData\Local\Temp\1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1396
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" -windowstyle hidden "$Matines=Get-Content 'C:\Users\Admin\AppData\Local\Temp\Moviedom230\Devenustate\Accorder\Uncoincidental\Incurvity.eft';$Intensities=$Matines.SubString(15241,3);.$Intensities($Matines)"
    3⤵
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3124
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c "set /A 1^^0"
      4⤵
      PID:1684
  - - C:\Users\Admin\AppData\Local\Temp\Brookier.exe
      "C:\Users\Admin\AppData\Local\Temp\Brookier.exe"
      4⤵
      Checks computer location settings
      Loads dropped DLL
      Suspicious use of NtCreateThreadExHideFromDebugger
      Suspicious use of NtSetInformationThreadHideFromDebugger
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4028
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Unphosphatizeds" /t REG_EXPAND_SZ /d "%Recolours% -windowstyle minimized $Finpudsningen=(Get-ItemProperty -Path 'HKCU:\Beakhead\').Kejserrn;%Recolours% ($Finpudsningen)"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2592
      - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Unphosphatizeds" /t REG_EXPAND_SZ /d "%Recolours% -windowstyle minimized $Finpudsningen=(Get-ItemProperty -Path 'HKCU:\Beakhead\').Kejserrn;%Recolours% ($Finpudsningen)"
        6⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:3396
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\SysWOW64\cmd.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:5016
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1656

Network

MITRE ATT&CK Enterprise v15

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Brookier.exe

Path C:\Users\Admin\AppData\Local\Temp\Brookier.exe
Size 563KB
SHA256 1ae1583b2be5c21f228a0e925652c9f5013bddf699548ca39b02670576325010
MD5 e0d35d2fe887cbe0b4de87f1be7d7a17
SHA1 b37f59b0ec54d6c40645837dbb3a18c954346601
SHA512 9d20fd479a57ccf51c02830744f095b5dfa98707777a8f24968aa0f0e9ac2a4de4ae348831a001b00cae9d750b9372a85248fdd15570a44ca52b90f8cf451256
SSDEEP 12288:8stfWr2z5t/dtpQBEd6XT9Pi8RzDm+EYRfT7d+:8st+r2z5J9Pd6XT9Pi85REYpT7d+
MD5 SHA1 SHA512 SSDEEP

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Incurvity.eft

Path C:\Users\Admin\AppData\Local\Temp\Moviedom230\Devenustate\Accorder\Uncoincidental\Incurvity.eft
Size 76KB
SHA256 02e8b4c4053f7f4352c533a46471ab963a86a8156267cdffeb74c0374d2c4c79
MD5 465454d4effb2dd4458e8032988455d0
SHA1 3afe548209cfe0721b65fbd2b4b6019354d0d59f
SHA512 c4a6031758908fe6b48046ab25f88a8983e63c95a6d94542a4e8812d172009f72020a842ee92f42742f15665eaed3e20cd6cf3cd2f166b7ceb2306ffbcceef3d
SSDEEP 1536:cbcsE1JLvUbYpjrIG+BeyZkMnLf8GvkVCG4Sn47Nqjd8FQ4X6g+0M4vY5ByetfAs:cb41xvGYBhKNZkMn7bvkYG4UE76gA5BT
MD5 SHA1 SHA512 SSDEEP

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Ringspinderne.Eks

Path C:\Users\Admin\AppData\Local\Temp\Moviedom230\Ringspinderne.Eks
Size 336KB
SHA256 698751c6b65fa692eace874966db90257c8166210c739be6d00a35053a30f2fa
MD5 3295c50e6679be9cda4405ea4aece7bb
SHA1 6361360fef5d23ee39c4ea42ea48d00e5952ad9a
SHA512 b21f13cecb5c481ca1d951847a4b54881b37c868ada0d54b39d2e784a7fc8acac7d56be1063c2090a053400fe0f149b5450d5afa840153f234ff3f08770bdcf6
SSDEEP 6144:ZeChrURjiUMHwYlPDUqL+OOm+zYxwYmGjUTWdsDxu+DT:L2jiUGw2RLnS/Y5gWeE+/
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_mhcfb5e5.rue.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mhcfb5e5.rue.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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nsExec.dll

Path C:\Users\Admin\AppData\Local\Temp\nso3837.tmp\nsExec.dll
Size 6KB
SHA256 10675f13abaee592f14382349aa35d82fb52aab4e27eef61d0c83dec1f6b73da
MD5 5aa38904acdcc21a2fb8a1d30a72d92f
SHA1 a9ce7d1456698921791db91347dba0489918d70c
SHA512 f04740da561d7cd0dea5e839c9e1c339d4a3e63944d3566c94c921a3d170a69918a32dff3f3b43f13d55cc25a2dbb4c21104f062c324308ac5104179766402a3
SSDEEP 96:AOBtEB2flLkatAthPZJoi9jpfW/er6cBbcB/NFyVOHd0+uHwEX:AhB2flXAVJtjf6cBbcB/N8Ved0PZ
MD5 SHA1 SHA512 SSDEEP

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memory/1656-81-0x00000226C6FC0000-0x00000226C709B000-memory.dmp

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memory/3124-28-0x0000000006510000-0x000000000652E000-memory.dmp

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memory/3124-43-0x0000000008EB0000-0x0000000009996000-memory.dmp

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memory/3124-16-0x0000000005E20000-0x0000000005E86000-memory.dmp

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memory/3124-15-0x0000000005520000-0x0000000005542000-memory.dmp

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memory/3124-27-0x0000000005F00000-0x0000000006254000-memory.dmp

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memory/3124-14-0x00000000056F0000-0x0000000005D18000-memory.dmp

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memory/3124-29-0x00000000065B0000-0x00000000065FC000-memory.dmp

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memory/3124-32-0x0000000006A80000-0x0000000006AA2000-memory.dmp

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memory/3124-31-0x0000000006A30000-0x0000000006A4A000-memory.dmp

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memory/3124-30-0x00000000075B0000-0x0000000007646000-memory.dmp

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memory/3124-33-0x0000000007C00000-0x00000000081A4000-memory.dmp

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memory/3124-12-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-35-0x0000000008830000-0x0000000008EAA000-memory.dmp

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memory/3124-39-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-38-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-37-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-13-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-41-0x0000000007A60000-0x0000000007A64000-memory.dmp

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memory/3124-42-0x0000000008EB0000-0x0000000009996000-memory.dmp

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memory/3124-17-0x0000000005E90000-0x0000000005EF6000-memory.dmp

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memory/3124-44-0x0000000073F20000-0x00000000746D0000-memory.dmp

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memory/3124-45-0x0000000077981000-0x0000000077AA1000-memory.dmp

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memory/3124-11-0x0000000073F20000-0x00000000746D0000-memory.dmp

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memory/3124-10-0x0000000002EE0000-0x0000000002F16000-memory.dmp

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memory/3124-65-0x0000000008EB0000-0x0000000009996000-memory.dmp

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memory/3124-52-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-51-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-50-0x00000000050B0000-0x00000000050C0000-memory.dmp

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memory/3124-59-0x0000000008EB0000-0x0000000009996000-memory.dmp

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memory/3124-64-0x0000000073F20000-0x00000000746D0000-memory.dmp

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memory/3524-74-0x0000000002550000-0x0000000002637000-memory.dmp

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memory/4028-63-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/4028-49-0x0000000001660000-0x0000000002146000-memory.dmp

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memory/4028-66-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/4028-68-0x0000000001660000-0x0000000002146000-memory.dmp

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memory/4028-70-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/4028-72-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/4028-48-0x0000000000400000-0x0000000001654000-memory.dmp

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memory/5016-71-0x0000000000550000-0x000000000058F000-memory.dmp

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memory/5016-73-0x0000000000550000-0x000000000058F000-memory.dmp

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