guloader | 034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a

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
25-10-2024 01:02

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General

Target

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
Size

511KB
MD5

24d65daddfed0602d8c90b5dfa47b7bb
SHA1

c46f000d10a66687cefd4a8fee1c8b3e84afd4b9
SHA256

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a
SHA512

09e16a15e18eb08f45f964fa271365e688507d561fc8567ce9417a54283dfb0785ef5a379456bb44cea187d7a5951521347a3e6f139560327460dfd449a6fe33
SSDEEP

12288:OjkqENMhypm0dvksi4P60gnkwNpRp9gS1S:yEmh8rRkvc61k4s

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.195:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-9EP276
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 7 IoCs

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

Processes:

resource	yara_rule
behavioral2/memory/672-42-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4912-49-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4912-48-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/672-40-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3892-37-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/672-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3892-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/672-42-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/672-40-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/672-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/3892-37-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3892-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.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

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	pid	Process	procid_target
PID 4100 set thread context of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 3788 set thread context of 3892	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	104
PID 3788 set thread context of 672	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	105
PID 3788 set thread context of 4912	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	106

Drops file in Windows directory 1 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	ioc	Process
File opened for modification	C:\Windows\misjoinder.ini	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.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 5 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

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
3892	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3892	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
4912	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
4912	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3892	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3892	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	pid	Process
Token: SeDebugPrivilege	4912	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

pid	Process
3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe

description	pid	Process	procid_target
PID 4100 wrote to memory of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 4100 wrote to memory of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 4100 wrote to memory of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 4100 wrote to memory of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 4100 wrote to memory of 3788	4100	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	92
PID 3788 wrote to memory of 3892	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	104
PID 3788 wrote to memory of 3892	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	104
PID 3788 wrote to memory of 3892	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	104
PID 3788 wrote to memory of 672	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	105
PID 3788 wrote to memory of 672	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	105
PID 3788 wrote to memory of 672	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	105
PID 3788 wrote to memory of 4912	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	106
PID 3788 wrote to memory of 4912	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	106
PID 3788 wrote to memory of 4912	3788	034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe	106

C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
"C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
  "C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3788
- - C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
    C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe /stext "C:\Users\Admin\AppData\Local\Temp\pfmroazdjvb"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3892
- - C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
    C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe /stext "C:\Users\Admin\AppData\Local\Temp\zirkossxxetpmr"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:672
- - C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe
    C:\Users\Admin\AppData\Local\Temp\034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a.exe /stext "C:\Users\Admin\AppData\Local\Temp\jcxcpldykmluoghhz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
cea2f486021d91ef1a15b270b76c0b64

SHA1
51e78b81d2d56eb2da467a4de84e680e1e54f9a7

SHA256
892ce7b61cfecf6cb43ef9fae19169896878b0d22b7296ae1a51ac0fd642edde

SHA512
25a866fc0fb822de67f38b97cf39ffffccf71e89af934ecb21c61b7ae4ddda19d28b22ec39511f59bf959bc2baffeec39ca974441776afdf72013edc4b7ec14b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsfADE4.tmp\System.dll

Filesize
11KB

MD5
960a5c48e25cf2bca332e74e11d825c9

SHA1
da35c6816ace5daf4c6c1d57b93b09a82ecdc876

SHA256
484f8e9f194ed9016274ef3672b2c52ed5f574fb71d3884edf3c222b758a75a2

SHA512
cc450179e2d0d56aee2ccf8163d3882978c4e9c1aa3d3a95875fe9ba9831e07ddfd377111dc67f801fa53b6f468a418f086f1de7c71e0a5b634e1ae2a67cd3da

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

Filesize
4KB

MD5
16dfb23eaa7972c59c36fcbc0946093b

SHA1
1e9e3ff83a05131575f67e202d352709205f20f8

SHA256
36c49c94327c8cadcad4c0d2b3a8f5162fc7bb86624923484476c5f7b960bc4c

SHA512
a8b38b5e7bf886b78c5c7f01234b44647a252d4dfbcc06c99b863f8e160e3cfc151b2a83b8b49e09d13e8547419467da4bffbb8dee5fc6740032eb7c839d89dc

Download Submit
memory/672-42-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/672-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/672-34-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/672-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/672-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3788-67-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-25-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-70-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-31-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-94-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-27-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-91-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-88-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-85-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-26-0x00000000016D0000-0x0000000003F2E000-memory.dmp

Filesize
40.4MB

Download
memory/3788-76-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-73-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-24-0x00000000016D0000-0x0000000003F2E000-memory.dmp

Filesize
40.4MB

Download
memory/3788-82-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-64-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-79-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3788-55-0x0000000034F20000-0x0000000034F39000-memory.dmp

Filesize
100KB

Download
memory/3788-58-0x0000000034F20000-0x0000000034F39000-memory.dmp

Filesize
100KB

Download
memory/3788-59-0x0000000034F20000-0x0000000034F39000-memory.dmp

Filesize
100KB

Download
memory/3788-61-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/3892-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3892-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3892-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3892-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4100-20-0x00000000049F0000-0x000000000724E000-memory.dmp

Filesize
40.4MB

Download
memory/4100-21-0x00000000770F1000-0x0000000077211000-memory.dmp

Filesize
1.1MB

Download
memory/4100-22-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

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memory/4100-23-0x00000000049F0000-0x000000000724E000-memory.dmp

Filesize
40.4MB

Download
memory/4912-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

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memory/4912-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

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memory/4912-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4912-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

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