guloader | 4412e46cdfffa346ea1d4e07b30077ccaa09fe1cbbe6f9965df193f2e063f4b7

Analysis

max time kernel
150s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
09-07-2024 11:21

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General

Target

MalwareBazaar.exe
Size

398KB
MD5

b1c35e78f5d588430c4f534479def9f2
SHA1

f787dd3327ca04361935f74867f76f16821db99f
SHA256

4412e46cdfffa346ea1d4e07b30077ccaa09fe1cbbe6f9965df193f2e063f4b7
SHA512

5f78e6794ae313f5ca96c33fe0ecf0c882a18a93caa54bf92823ac42c5c753b6a98d4c77618de2b62cbc9d24e6e500272e4ffa7b25afff20b7e8349fc278a66c
SSDEEP

12288:9GkmNVhJhqnfP30YhNia+nv4tQD3W/P19QY:9GkmPh7qfPrsQeD3W/bd

Score

10^/10

guloader collection downloader evasion execution persistence trojan

Malware Config

Signatures

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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/988-74-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3596-70-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3596-70-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1232-69-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/988-74-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4860	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2753856825-3907105642-1818461144-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wab.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-1-5-21-2753856825-3907105642-1818461144-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ortyginae = "%Monopolizables% -windowstyle minimized $masturbated=(Get-ItemProperty -Path 'HKCU:\\Audiometeret\\').Rudolph;%Monopolizables% ($masturbated)"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
16	drive.google.com
17	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
1804	wab.exe
1804	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4860	powershell.exe
1804	wab.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4860 set thread context of 1804	4860	powershell.exe	88
PID 1804 set thread context of 3596	1804	wab.exe	96
PID 1804 set thread context of 988	1804	wab.exe	98
PID 1804 set thread context of 1232	1804	wab.exe	99

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
2276	reg.exe
4388	reg.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
4860	powershell.exe
1232	wab.exe
1232	wab.exe
3596	wab.exe
3596	wab.exe
3596	wab.exe
3596	wab.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
4860	powershell.exe
1804	wab.exe
1804	wab.exe
1804	wab.exe
1804	wab.exe
1804	wab.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4860	powershell.exe
Token: SeDebugPrivilege	1232	wab.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1804	wab.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 4860	1452	MalwareBazaar.exe	84
PID 1452 wrote to memory of 4860	1452	MalwareBazaar.exe	84
PID 1452 wrote to memory of 4860	1452	MalwareBazaar.exe	84
PID 4860 wrote to memory of 1804	4860	powershell.exe	88
PID 4860 wrote to memory of 1804	4860	powershell.exe	88
PID 4860 wrote to memory of 1804	4860	powershell.exe	88
PID 4860 wrote to memory of 1804	4860	powershell.exe	88
PID 4860 wrote to memory of 1804	4860	powershell.exe	88
PID 1804 wrote to memory of 680	1804	wab.exe	89
PID 1804 wrote to memory of 680	1804	wab.exe	89
PID 1804 wrote to memory of 680	1804	wab.exe	89
PID 680 wrote to memory of 2276	680	cmd.exe	91
PID 680 wrote to memory of 2276	680	cmd.exe	91
PID 680 wrote to memory of 2276	680	cmd.exe	91
PID 1804 wrote to memory of 5072	1804	wab.exe	92
PID 1804 wrote to memory of 5072	1804	wab.exe	92
PID 1804 wrote to memory of 5072	1804	wab.exe	92
PID 5072 wrote to memory of 4388	5072	cmd.exe	94
PID 5072 wrote to memory of 4388	5072	cmd.exe	94
PID 5072 wrote to memory of 4388	5072	cmd.exe	94
PID 1804 wrote to memory of 5048	1804	wab.exe	95
PID 1804 wrote to memory of 5048	1804	wab.exe	95
PID 1804 wrote to memory of 5048	1804	wab.exe	95
PID 1804 wrote to memory of 3596	1804	wab.exe	96
PID 1804 wrote to memory of 3596	1804	wab.exe	96
PID 1804 wrote to memory of 3596	1804	wab.exe	96
PID 1804 wrote to memory of 3596	1804	wab.exe	96
PID 1804 wrote to memory of 1056	1804	wab.exe	97
PID 1804 wrote to memory of 1056	1804	wab.exe	97
PID 1804 wrote to memory of 1056	1804	wab.exe	97
PID 1804 wrote to memory of 988	1804	wab.exe	98
PID 1804 wrote to memory of 988	1804	wab.exe	98
PID 1804 wrote to memory of 988	1804	wab.exe	98
PID 1804 wrote to memory of 988	1804	wab.exe	98
PID 1804 wrote to memory of 1232	1804	wab.exe	99
PID 1804 wrote to memory of 1232	1804	wab.exe	99
PID 1804 wrote to memory of 1232	1804	wab.exe	99
PID 1804 wrote to memory of 1232	1804	wab.exe	99

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Vangede=Get-Content 'C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\Reexpression.Tid';$Spondylotomy=$Vangede.SubString(70479,3);.$Spondylotomy($Vangede)"
  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:4860
- - C:\Program Files (x86)\windows mail\wab.exe
    "C:\Program Files (x86)\windows mail\wab.exe"
    3⤵
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1804
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Ortyginae" /t REG_EXPAND_SZ /d "%Monopolizables% -windowstyle minimized $masturbated=(Get-ItemProperty -Path 'HKCU:\Audiometeret\').Rudolph;%Monopolizables% ($masturbated)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:680
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Ortyginae" /t REG_EXPAND_SZ /d "%Monopolizables% -windowstyle minimized $masturbated=(Get-ItemProperty -Path 'HKCU:\Audiometeret\').Rudolph;%Monopolizables% ($masturbated)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2276
  - - C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5072
    - - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        UAC bypass
        Modifies registry key
        
        PID:4388
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fuiyczanpr"
      4⤵
      PID:5048
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fuiyczanpr"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3596
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\hovjvslpdznnmf"
      4⤵
      PID:1056
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\hovjvslpdznnmf"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:988
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\srbbwkwizifrwujzw"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1232

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
132B

MD5
1caccddbf121cb45204f0e560285e8f3

SHA1
5b599e96809ed691ebea4338e1f2cb53a58e633b

SHA256
5e9630fae07c9509fe8df9c38d8ef4d03a55057a1cd8d717a115fb0ebca29fe8

SHA512
14b1ee6fbcd2070eb970c08673895dc53b4f48567c72f4b60e58b75da7a30e17c77eaddb00d8e49e71c3fe8330a93ec65bd9e1ab09c3b7b198d164fe2353b244

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lda1zlio.ez4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\fuiyczanpr

Filesize
4KB

MD5
f3cf9e43fc7977c8af0a251a87b79b4a

SHA1
44b709fd5d0933f4430e4226d04376cf12c5210e

SHA256
af11fd5fb7256792c24e545b0f9ce676a71f4ae9b13752bfbc7a02a86302d811

SHA512
50926bb7e8e09f6bc1c63b4a818c66d40d167d6fa48d34eace32e2009097dd5bb446c2bae0785059772697a35dfe61f40a80c74f42fe4da3251e7e159b2c8e61

Download Submit
C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\Boomless.Fag

Filesize
344KB

MD5
1a78d0f226d0db154812e61b8cadb4b8

SHA1
e76650e32ed8bc1e3d72dde1aa6566ff031e0c6e

SHA256
19997e372b58bcd5bacd8b199b1633307f0c89fc3ce7abfd4087ec739742f78e

SHA512
b06759e8bfeb73187c5277aaaa9c6489f51a88f42b461ec0775de6741f6b797dc3c2cbb8f6cf79815078a420a26cde9cedd861c4d16ac73a037e2160efc4ec41

Download Submit
C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\Reexpression.Tid

Filesize
68KB

MD5
d89dac6d6bcfb431c31bdf7d21f48fbd

SHA1
2f55f2b77da6a9078c7bb90fd87b205c9c4cf3b9

SHA256
ffeacf6c0a98133600a0f1de25732fb4b22b06af6921edd316e52a6d7837359b

SHA512
76eb9025c18fd7661cb72d47c7eda57a45304594e5aea32fe73b1dd94ec9db81753726f83e6d9f82924c3b9295eef4725dbaa7d633963ac8e8e91b7444346070

Download Submit
memory/988-64-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/988-74-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/988-67-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1232-69-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1232-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1232-68-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1804-77-0x0000000020A80000-0x0000000020A99000-memory.dmp

Filesize
100KB

Download
memory/1804-81-0x0000000020A80000-0x0000000020A99000-memory.dmp

Filesize
100KB

Download
memory/1804-80-0x0000000020A80000-0x0000000020A99000-memory.dmp

Filesize
100KB

Download
memory/1804-60-0x0000000001D50000-0x00000000048EE000-memory.dmp

Filesize
43.6MB

Download
memory/3596-70-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3596-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3596-63-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4860-28-0x0000000005DC0000-0x0000000005E0C000-memory.dmp

Filesize
304KB

Download
memory/4860-32-0x0000000007390000-0x0000000007934000-memory.dmp

Filesize
5.6MB

Download
memory/4860-38-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-36-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-40-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-42-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-41-0x0000000008640000-0x000000000B1DE000-memory.dmp

Filesize
43.6MB

Download
memory/4860-43-0x0000000073A1E000-0x0000000073A1F000-memory.dmp

Filesize
4KB

Download
memory/4860-44-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-45-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-56-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-61-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-34-0x0000000007FC0000-0x000000000863A000-memory.dmp

Filesize
6.5MB

Download
memory/4860-37-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-31-0x0000000006300000-0x0000000006322000-memory.dmp

Filesize
136KB

Download
memory/4860-30-0x00000000062B0000-0x00000000062CA000-memory.dmp

Filesize
104KB

Download
memory/4860-29-0x0000000006D40000-0x0000000006DD6000-memory.dmp

Filesize
600KB

Download
memory/4860-9-0x0000000073A1E000-0x0000000073A1F000-memory.dmp

Filesize
4KB

Download
memory/4860-27-0x0000000005D90000-0x0000000005DAE000-memory.dmp

Filesize
120KB

Download
memory/4860-26-0x00000000057C0000-0x0000000005B14000-memory.dmp

Filesize
3.3MB

Download
memory/4860-16-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/4860-15-0x00000000056E0000-0x0000000005746000-memory.dmp

Filesize
408KB

Download
memory/4860-14-0x0000000004DC0000-0x0000000004DE2000-memory.dmp

Filesize
136KB

Download
memory/4860-13-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-11-0x0000000004FD0000-0x00000000055F8000-memory.dmp

Filesize
6.2MB

Download
memory/4860-12-0x0000000073A10000-0x00000000741C0000-memory.dmp

Filesize
7.7MB

Download
memory/4860-10-0x00000000047A0000-0x00000000047D6000-memory.dmp

Filesize
216KB

Download