guloader | f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-11-2024 13:18

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General

Target

f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
Size

454KB
MD5

6ff1a159ea827fc4cc63417004a81030
SHA1

e6412f570c1c3aa91e8e87a92a8a848547f9b94d
SHA256

f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10
SHA512

0039a328696c002a533da4f51ece25b61e7bb4256bb2af5dff02fa338f9a18e0a69da5ea3618d2f4c746960aa2df3188a5c0c1b115568e81a1436fc6b85b9116
SSDEEP

12288:eTLpZM7P6UknZxn/7kRizAMzd6V7+aqEsapYNd1:eT7M7P6FZQQRxC7+JEfpWd1

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 family
guloader
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
Remcos family
remcos

Detected Nirsoft tools 8 IoCs

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

resource	yara_rule
behavioral2/memory/3376-36-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3376-29-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4576-41-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2908-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4576-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2908-27-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4576-42-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2908-45-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3376-36-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3376-29-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2908-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2908-27-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2908-45-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.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-1-5-21-3350944739-639801879-157714471-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2032 set thread context of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 3448 set thread context of 2908	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	98
PID 3448 set thread context of 3376	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	99
PID 3448 set thread context of 4576	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	100

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Forportens179.ini	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
File created	C:\Program Files (x86)\nellike\dermatophagus.lnk	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2908	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
2908	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
4576	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
4576	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
2908	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
2908	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4576	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 2032 wrote to memory of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 2032 wrote to memory of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 2032 wrote to memory of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 2032 wrote to memory of 3448	2032	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	91
PID 3448 wrote to memory of 2908	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	98
PID 3448 wrote to memory of 2908	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	98
PID 3448 wrote to memory of 2908	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	98
PID 3448 wrote to memory of 3376	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	99
PID 3448 wrote to memory of 3376	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	99
PID 3448 wrote to memory of 3376	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	99
PID 3448 wrote to memory of 4576	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	100
PID 3448 wrote to memory of 4576	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	100
PID 3448 wrote to memory of 4576	3448	f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe	100

C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
"C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
  "C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.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:3448
- - C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
    C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe /stext "C:\Users\Admin\AppData\Local\Temp\fqigaeoiylbmdzyk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2908
- - C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
    C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe /stext "C:\Users\Admin\AppData\Local\Temp\qknrawyjuttrfnmoubn"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3376
- - C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe
    C:\Users\Admin\AppData\Local\Temp\f7962bec2e9ae0913ca8c8b3349a306d5e6f200ec6c1531e35749bb00d1b6a10.exe /stext "C:\Users\Admin\AppData\Local\Temp\sesjtpjdiblwptisemayglm"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4576

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
4bbc246671dfee49335d65593810e930

SHA1
62c5304a6b2ff69c3ccf7451749002ab2b812bc0

SHA256
49d8d1ea6039523970d5484ae833cd72503650012993034f18feeda146eaf309

SHA512
c3463276cea52c8b0343bda0c13f3a17f6dd9650e0d0da946f62ef0a2ecf5acc2d4f3cfacfddca2cb5d4439e66402b79838747ae57a05c57e073330842a2de7e

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

Filesize
4KB

MD5
c3c5f2de99b7486f697634681e21bab0

SHA1
00f90d495c0b2b63fde6532e033fdd2ade25633d

SHA256
76296dc29f718988107d35d0e0b835c2bf3fc7405e79e5121aa4738f82b51582

SHA512
7c60ffdc093de30e793d20768877f2f586bee3e948767871f9a1139252d5d2f593ba6f88ce0ed5f72c79faddb26186792df0581e4b6c84d405c44d9d12f951b8

Download Submit
C:\Users\Admin\AppData\Local\Temp\nse9C9F.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/2032-13-0x0000000004210000-0x0000000006381000-memory.dmp

Filesize
33.4MB

Download
memory/2032-14-0x0000000076ED1000-0x0000000076FF1000-memory.dmp

Filesize
1.1MB

Download
memory/2032-15-0x0000000073D35000-0x0000000073D36000-memory.dmp

Filesize
4KB

Download
memory/2032-16-0x0000000004210000-0x0000000006381000-memory.dmp

Filesize
33.4MB

Download
memory/2908-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2908-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2908-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2908-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2908-25-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3376-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3376-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3376-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3376-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3448-61-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-18-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-91-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-39-0x00000000016E0000-0x0000000003851000-memory.dmp

Filesize
33.4MB

Download
memory/3448-88-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-85-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-82-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-23-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-48-0x0000000034850000-0x0000000034869000-memory.dmp

Filesize
100KB

Download
memory/3448-52-0x0000000034850000-0x0000000034869000-memory.dmp

Filesize
100KB

Download
memory/3448-51-0x0000000034850000-0x0000000034869000-memory.dmp

Filesize
100KB

Download
memory/3448-55-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-58-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-79-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-17-0x00000000016E0000-0x0000000003851000-memory.dmp

Filesize
33.4MB

Download
memory/3448-64-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-67-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-70-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-73-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/3448-76-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4576-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4576-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4576-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4576-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4576-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download