guloader | a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2025, 03:50

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General

Target

a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Size

700KB
MD5

8897bad145bedfb5534dbe7d1dd93fb0
SHA1

fdaa956d0dde4a0d4c1a405e07bca11dc26467a6
SHA256

a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6
SHA512

6bfbdcb3ef738bbb377101526eb146e9948b598727275e99af4b200f98df0c8ddda9bd21c001e8503de06d6e4ee6f8a08e165a43b77429c6c56928eb7ab34f3c
SSDEEP

12288:wYFMrtB0UyWbuz1ZuvZuWRCwqA/RDzanhMqHkYxcj:wYytB0UyWbuyvEWRzZRDIhMV

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

204.10.160.190:2404

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-GUFRHI
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/1908-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2856-54-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2856-52-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2856-56-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1908-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2248-58-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2248-59-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1908-62-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2248-58-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2248-59-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1908-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1908-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1908-62-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.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-1-5-21-3181990009-820930284-137514597-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 116 set thread context of 1908	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	94
PID 116 set thread context of 2248	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	95
PID 116 set thread context of 2856	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	96

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	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1908	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
1908	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2856	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2856	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
1908	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
1908	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2856	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4312 wrote to memory of 116	4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	93
PID 4312 wrote to memory of 116	4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	93
PID 4312 wrote to memory of 116	4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	93
PID 4312 wrote to memory of 116	4312	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	93
PID 116 wrote to memory of 1908	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	94
PID 116 wrote to memory of 1908	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	94
PID 116 wrote to memory of 1908	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	94
PID 116 wrote to memory of 2248	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	95
PID 116 wrote to memory of 2248	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	95
PID 116 wrote to memory of 2248	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	95
PID 116 wrote to memory of 2856	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	96
PID 116 wrote to memory of 2856	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	96
PID 116 wrote to memory of 2856	116	a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	96

C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
"C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4312
- C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
  "C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.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:116
- - C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\cmiyonsbupownc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1908
- - C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\mgojpgcdhxgbpivli"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2248
- - C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\xitcqynwvfynzwrxshdwl"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2856

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
769d0fc0de652f29c628634a1dab2c46

SHA1
cd0500fe3f02d93f47b24ea2b9f8c0f65ad4c509

SHA256
7c92ce9feaf1594d9f33bb86aa589431caeacb6a67fb69204e68f69da77577e3

SHA512
583880153bd9ba063e7fd717c96c551335b77a11e85b641352205ca80ff0428eebadb65de79a8e62205d5594b231f8d5b3417de155070b7972f3daa1fceb7124

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

Filesize
4KB

MD5
9b465182c4e03bbc8d159763887ea756

SHA1
8ad7d7b486eb6c89680bb212bd0ae93253fe8b4b

SHA256
cd4add46e63f638f19ab4764ea5b27f661aa3aa54dfd82aaefd3a6bbaf2238cd

SHA512
9356050e5e3d4595a65e9ad35694bf2d10cfff15450d2fe38cb611db79fbf81b61d6a8fc61a3ab127ac96b22ab7a43e682a535bd9426d0924e01b86cffd4dbdc

Download Submit
C:\Users\Admin\AppData\Local\Temp\nss3DC2.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/116-70-0x0000000077811000-0x0000000077931000-memory.dmp

Filesize
1.1MB

Download
memory/116-90-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-27-0x0000000077898000-0x0000000077899000-memory.dmp

Filesize
4KB

Download
memory/116-28-0x00000000778B5000-0x00000000778B6000-memory.dmp

Filesize
4KB

Download
memory/116-29-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-34-0x0000000077811000-0x0000000077931000-memory.dmp

Filesize
1.1MB

Download
memory/116-30-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-35-0x00000000016E0000-0x0000000004A7B000-memory.dmp

Filesize
51.6MB

Download
memory/116-99-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-96-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-93-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-65-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/116-87-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-84-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-81-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-78-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-75-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-72-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/116-26-0x00000000016E0000-0x0000000004A7B000-memory.dmp

Filesize
51.6MB

Download
memory/116-68-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/116-69-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/1908-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-62-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2248-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2248-58-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2248-59-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2248-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2248-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2856-52-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2856-56-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2856-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2856-54-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2856-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4312-23-0x0000000077811000-0x0000000077931000-memory.dmp

Filesize
1.1MB

Download
memory/4312-24-0x0000000077811000-0x0000000077931000-memory.dmp

Filesize
1.1MB

Download
memory/4312-25-0x0000000074675000-0x0000000074676000-memory.dmp

Filesize
4KB

Download