guloader | 3566b134a76d197e837c797e1bc2e5395b54488a4d1a1e8f24fe0bb78467eb40

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15/07/2024, 13:12

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General

Target
Brnesde.exe
Size 966KB
Sample240715-qfhfvasfnl
SHA256 3566b134a76d197e837c797e1bc2e5395b54488a4d1a1e8f24fe0bb78467eb40
MD5 c69a02e6740a3e0391d961db6ff3b0b3
SHA1 2e83d1732afe42680b27927fc5c23e63246f3cfc
SHA512 bfbf9071fd16437f78637aed5c38fc4ee8e171ec75ca012f8a0ab6253041bb1e83b6a79c139c9a5017fdbd1d3502d2a8f4b3172be5ad5c141db4721c3a6145fc
SSDEEP 12288:Kl0x0NTx8/MWSMaG6s+nIvbcIst8pMVQwvN9NyWilkE0I+VNEpCpiZs1eCKDwQS5:741WSTsrDcIc8pM+wkxp0vbRiZs1etfg
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader downloader execution persistence

Malware Config

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
412	powershell.exe

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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	Acanthophis.exe

Loads dropped DLL 1 IoCs

pid	Process
3944	Acanthophis.exe

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-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Recanalization% -windowstyle minimized $Redimensioned=(Get-ItemProperty -Path 'HKCU:\\Same\\').Boilerhouse;%Recanalization% ($Redimensioned)"	reg.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
412	powershell.exe
3944	Acanthophis.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 412 set thread context of 3944	412	powershell.exe	89

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\rigelige\motorcyclists.tot	Brnesde.exe
File opened for modification	C:\Program Files (x86)\aflagte.pld	Brnesde.exe

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2572	reg.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe
412	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
412	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	412	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 740 wrote to memory of 412	740	Brnesde.exe	86
PID 740 wrote to memory of 412	740	Brnesde.exe	86
PID 740 wrote to memory of 412	740	Brnesde.exe	86
PID 412 wrote to memory of 3944	412	powershell.exe	89
PID 412 wrote to memory of 3944	412	powershell.exe	89
PID 412 wrote to memory of 3944	412	powershell.exe	89
PID 412 wrote to memory of 3944	412	powershell.exe	89
PID 412 wrote to memory of 3944	412	powershell.exe	89
PID 3944 wrote to memory of 800	3944	Acanthophis.exe	90
PID 3944 wrote to memory of 800	3944	Acanthophis.exe	90
PID 3944 wrote to memory of 800	3944	Acanthophis.exe	90
PID 800 wrote to memory of 2572	800	cmd.exe	92
PID 800 wrote to memory of 2572	800	cmd.exe	92
PID 800 wrote to memory of 2572	800	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\Brnesde.exe
"C:\Users\Admin\AppData\Local\Temp\Brnesde.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:740
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Ratiocinated=Get-Content 'C:\Users\Admin\AppData\Roaming\sorteringsformens\tintallerknen\enervate\oppugner.Fin';$Lejeloven=$Ratiocinated.SubString(51544,3);.$Lejeloven($Ratiocinated)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:412
- - C:\Users\Admin\AppData\Local\Temp\Acanthophis.exe
    "C:\Users\Admin\AppData\Local\Temp\Acanthophis.exe"
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of WriteProcessMemory
    PID:3944
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Recanalization% -windowstyle minimized $Redimensioned=(Get-ItemProperty -Path 'HKCU:\Same\').Boilerhouse;%Recanalization% ($Redimensioned)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:800
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Recanalization% -windowstyle minimized $Redimensioned=(Get-ItemProperty -Path 'HKCU:\Same\').Boilerhouse;%Recanalization% ($Redimensioned)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Acanthophis.exe

Path C:\Users\Admin\AppData\Local\Temp\Acanthophis.exe
Size 966KB
SHA256 3566b134a76d197e837c797e1bc2e5395b54488a4d1a1e8f24fe0bb78467eb40
MD5 c69a02e6740a3e0391d961db6ff3b0b3
SHA1 2e83d1732afe42680b27927fc5c23e63246f3cfc
SHA512 bfbf9071fd16437f78637aed5c38fc4ee8e171ec75ca012f8a0ab6253041bb1e83b6a79c139c9a5017fdbd1d3502d2a8f4b3172be5ad5c141db4721c3a6145fc
SSDEEP 12288:Kl0x0NTx8/MWSMaG6s+nIvbcIst8pMVQwvN9NyWilkE0I+VNEpCpiZs1eCKDwQS5:741WSTsrDcIc8pM+wkxp0vbRiZs1etfg
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_if0vq0hs.hku.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_if0vq0hs.hku.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Averments.Bif

Path C:\Users\Admin\AppData\Roaming\sorteringsformens\tintallerknen\enervate\Averments.Bif
Size 299KB
SHA256 3e3554c25633c3b93778fcef9b984f52bf4646f560ef04ae6b83a59fffdc8c6b
MD5 acb214c6fa5b9ade5dab9fa75f8be6ad
SHA1 11103ba1783f1082539e64efd11b46c26b7f401b
SHA512 7407868bb589ac15746c38aa87c281d6fa918ff7571d28c50f55745c8cdfc0a0828b64af316247f42a527f45876753a205a4176396fd85168b2b83c4cf1fe609
SSDEEP 6144:dvzq8vGU5oNfrY52v1im0Lj164dHgbfIdxEhKw/Cyp1Lg2sz:08vGU5o1im0v16Qg8dx1ync2W
MD5 SHA1 SHA512 SSDEEP

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oppugner.Fin

Path C:\Users\Admin\AppData\Roaming\sorteringsformens\tintallerknen\enervate\oppugner.Fin
Size 50KB
SHA256 43bd1684683347321729462e7486b66998cf2e2a36a59279fde5651caad63bc8
MD5 04391ad19a5faf0f2b6b55a651362605
SHA1 162222e45632fa3b9d1de454dff25c5c452bd81b
SHA512 72b43a95e49b3aa4a59c6d34d9292f7d0fa166354d994d929591251496ee71c279192e807122cd698be2192c00d0cb6629aee2d1f749913afe453c835ca7a43a
SSDEEP 768:I9joOPoklnuJecH/zvrTRQOOSqFGxG6eZbazQdRXvSgzVehypcmby/W80lMz:IepbzPU+RehaUdRKghehJ/W80Oz
MD5 SHA1 SHA512 SSDEEP

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memory/412-32-0x0000000008AF0000-0x000000000916A000-memory.dmp

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memory/412-36-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-14-0x0000000005810000-0x0000000005876000-memory.dmp

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memory/412-12-0x0000000005700000-0x0000000005722000-memory.dmp

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memory/412-24-0x0000000006090000-0x00000000063E4000-memory.dmp

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memory/412-25-0x00000000066A0000-0x00000000066BE000-memory.dmp

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memory/412-26-0x0000000006730000-0x000000000677C000-memory.dmp

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memory/412-27-0x0000000007870000-0x0000000007906000-memory.dmp

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memory/412-28-0x0000000006BC0000-0x0000000006BDA000-memory.dmp

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memory/412-29-0x0000000006C40000-0x0000000006C62000-memory.dmp

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memory/412-30-0x0000000007EC0000-0x0000000008464000-memory.dmp

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memory/412-11-0x00000000058A0000-0x0000000005EC8000-memory.dmp

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memory/412-8-0x000000007414E000-0x000000007414F000-memory.dmp

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memory/412-34-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-35-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-13-0x00000000057A0000-0x0000000005806000-memory.dmp

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memory/412-10-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-38-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-39-0x0000000009170000-0x000000000A183000-memory.dmp

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memory/412-40-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-41-0x000000007414E000-0x000000007414F000-memory.dmp

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memory/412-43-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-45-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-9-0x00000000030D0000-0x0000000003106000-memory.dmp

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memory/412-66-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-51-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/412-60-0x0000000074140000-0x00000000748F0000-memory.dmp

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memory/3944-58-0x0000000000490000-0x00000000016E4000-memory.dmp

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memory/3944-61-0x00000000016F0000-0x0000000002703000-memory.dmp

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memory/3944-48-0x00000000016F0000-0x0000000002703000-memory.dmp

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