guloader | 2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68

Analysis

max time kernel
150s
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
20-09-2024 07:08

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General

Target

2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Size

519KB
MD5

cfd30b0bf833178f0d730ae3703b4c56
SHA1

de278f275878b570ce2a5efb69456555e888eaae
SHA256

2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68
SHA512

109deb972cf14b889687ffd58587a603fd9bd4b2a744bc4fb033552e8148a7232e8021db973432335a9ea1dcc2518effee11eb57ad85c3b34d2239fcc50461b9
SSDEEP

6144:sp8oOpVQtWBonIuwtkzixAn9EF99+wykDaxfnasuDjvdjplyTztn1xT4p+/l/JbX:po+VIWBonIuwQn9EF99+SDRfnqBr+KsW

Score

10^/10

guloader remcos remotehost collection credential_access discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

162.251.122.106:2404

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-A7EXAF
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 7 IoCs

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

resource	yara_rule
behavioral2/memory/4828-28-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3144-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4460-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4460-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4828-32-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4828-31-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3144-45-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4828-28-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4828-32-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4828-31-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3144-36-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3144-45-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1464 set thread context of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 3092 set thread context of 3144	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	90
PID 3092 set thread context of 4828	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 3092 set thread context of 4460	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92

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	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4460	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4460	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3144	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3144	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3144	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3144	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 1464 wrote to memory of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 1464 wrote to memory of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 1464 wrote to memory of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 1464 wrote to memory of 3092	1464	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	88
PID 3092 wrote to memory of 3144	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	90
PID 3092 wrote to memory of 3144	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	90
PID 3092 wrote to memory of 3144	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	90
PID 3092 wrote to memory of 4828	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 3092 wrote to memory of 4828	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 3092 wrote to memory of 4828	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 3092 wrote to memory of 4460	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 3092 wrote to memory of 4460	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 3092 wrote to memory of 4460	3092	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92

C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
"C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
  "C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.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:3092
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\hqmixulpmmmmjhqzozpnymbkizs"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3144
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\rlsbyndrauerlvndfkbpbzotrfkzzo"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4828
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\cnxtzfokocwewbbpovoimeiksutasztexg"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4460

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
9a9cb49d4675a47be4288aa9791ebd96

SHA1
6e34cb597660c126447c96304ec2969fa5244d35

SHA256
040ec5fdde7c705f3ad17af90575820eaa9a023e8038beb0b01079cd5ab84d28

SHA512
2479bd3e21be8c6b7af4e65ae5dfcab0c0b34313bdf080bf895ef6164ed4c8058c863fe85da76d7a63f435c7d2d9db3ca8f8b1ea0ee5285805cdcc57b6424cd8

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

Filesize
4KB

MD5
2538ec9e8425a905937573069b77d4c2

SHA1
ad0c2b7aff4382e23444d26adac96d9697b849f3

SHA256
29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

SHA512
a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsn8EA4.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/1464-11-0x0000000002880000-0x0000000004FAD000-memory.dmp

Filesize
39.2MB

Download
memory/1464-12-0x0000000002880000-0x0000000004FAD000-memory.dmp

Filesize
39.2MB

Download
memory/1464-13-0x00000000771E1000-0x0000000077301000-memory.dmp

Filesize
1.1MB

Download
memory/1464-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1464-20-0x0000000002880000-0x0000000004FAD000-memory.dmp

Filesize
39.2MB

Download
memory/3092-48-0x0000000034DB0000-0x0000000034DC9000-memory.dmp

Filesize
100KB

Download
memory/3092-84-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-21-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-87-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-72-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-69-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-66-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-63-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-60-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-54-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-81-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-15-0x00000000016C0000-0x0000000003DED000-memory.dmp

Filesize
39.2MB

Download
memory/3092-78-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-22-0x00000000016C0000-0x0000000003DED000-memory.dmp

Filesize
39.2MB

Download
memory/3092-57-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-16-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-75-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/3092-51-0x0000000034DB0000-0x0000000034DC9000-memory.dmp

Filesize
100KB

Download
memory/3092-52-0x0000000034DB0000-0x0000000034DC9000-memory.dmp

Filesize
100KB

Download
memory/3144-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3144-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3144-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3144-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4460-33-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4460-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4460-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4460-29-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4828-25-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4828-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4828-27-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4828-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4828-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download