guloader | 1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
06-11-2024 12:37

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General

Target

RFQ 6000208225.exe
Size

1.3MB
MD5

3392cd428f177152dcf9ac6256365b1a
SHA1

3e454db1c2d909510594a48efbe0380c3194aa2f
SHA256

1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1
SHA512

53265bead60447f7dd26db363dfe3a698d83c51019c4fa1d51907d5166cd53e11dae4da51ee3ebe162f0313ac6b2971a0a3904a4738fde116d835eab4c4d53bb
SSDEEP

24576:Z6k1f9gIpCzUjadgzQdbzyoxSyz74WCePDMoqno2NND74lams:ZJFmSCzyApoy/p3PDP6Ela3

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.220:2404

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-2JYO24
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
behavioral1/memory/2684-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2724-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2684-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1388-49-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1388-50-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2684-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2724-62-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2724-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2724-62-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2684-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2684-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2684-56-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
2300	RFQ 6000208225.exe
2300	RFQ 6000208225.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	RFQ 6000208225.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2964	RFQ 6000208225.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2300	RFQ 6000208225.exe
2964	RFQ 6000208225.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2300 set thread context of 2964	2300	RFQ 6000208225.exe	30
PID 2964 set thread context of 2684	2964	RFQ 6000208225.exe	32
PID 2964 set thread context of 2724	2964	RFQ 6000208225.exe	33
PID 2964 set thread context of 1388	2964	RFQ 6000208225.exe	34

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\karga.ini	RFQ 6000208225.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	RFQ 6000208225.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ 6000208225.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ 6000208225.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ 6000208225.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ 6000208225.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2684	RFQ 6000208225.exe
2684	RFQ 6000208225.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2300	RFQ 6000208225.exe
2964	RFQ 6000208225.exe
2964	RFQ 6000208225.exe
2964	RFQ 6000208225.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	RFQ 6000208225.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2964	RFQ 6000208225.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2300 wrote to memory of 2964	2300	RFQ 6000208225.exe	30
PID 2964 wrote to memory of 2684	2964	RFQ 6000208225.exe	32
PID 2964 wrote to memory of 2684	2964	RFQ 6000208225.exe	32
PID 2964 wrote to memory of 2684	2964	RFQ 6000208225.exe	32
PID 2964 wrote to memory of 2684	2964	RFQ 6000208225.exe	32
PID 2964 wrote to memory of 2724	2964	RFQ 6000208225.exe	33
PID 2964 wrote to memory of 2724	2964	RFQ 6000208225.exe	33
PID 2964 wrote to memory of 2724	2964	RFQ 6000208225.exe	33
PID 2964 wrote to memory of 2724	2964	RFQ 6000208225.exe	33
PID 2964 wrote to memory of 1388	2964	RFQ 6000208225.exe	34
PID 2964 wrote to memory of 1388	2964	RFQ 6000208225.exe	34
PID 2964 wrote to memory of 1388	2964	RFQ 6000208225.exe	34
PID 2964 wrote to memory of 1388	2964	RFQ 6000208225.exe	34

C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.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:2300
- C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.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:2964
- - C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wffvlpgpdzepqduzlcoegwnvn"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2684
- - C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\hitolirqrhwuajidumigjbieoewtv"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2724
- - C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\jcyymackfpogcxehdxvzuocvxkfcopxp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1388

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
8ac1dbd9638470a6f6a205869a00ba68

SHA1
5984d595bdefa760c4c91b3da686ef0db804e605

SHA256
df6248a62c64e054315f0b55bbf8db4f59cd714a43bde7f3bb998e53091da079

SHA512
20fdc612785052a7f30d14c9ef4567266ee9bb73ea77ac40857b4ff6507ca0fe55eb7ea53c9b417f7f59e2283804a8b76be41d89dd5c4da085265aa2c4e1766f

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nseC85F.tmp\System.dll

Filesize
11KB

MD5
fc3772787eb239ef4d0399680dcc4343

SHA1
db2fa99ec967178cd8057a14a428a8439a961a73

SHA256
9b93c61c9d63ef8ec80892cc0e4a0877966dca9b0c3eb85555cebd2ddf4d6eed

SHA512
79e491ca4591a5da70116114b7fbb66ee15a0532386035e980c9dfe7afb59b1f9d9c758891e25bfb45c36b07afd3e171bac37a86c887387ef0e80b1eaf296c89

Download Submit
memory/1388-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1388-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1388-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1388-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2300-27-0x0000000004340000-0x0000000005C6C000-memory.dmp

Filesize
25.2MB

Download
memory/2300-28-0x0000000076F61000-0x0000000077062000-memory.dmp

Filesize
1.0MB

Download
memory/2300-29-0x0000000076F60000-0x0000000077109000-memory.dmp

Filesize
1.7MB

Download
memory/2300-31-0x0000000004340000-0x0000000005C6C000-memory.dmp

Filesize
25.2MB

Download
memory/2684-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2684-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2684-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2684-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2684-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2724-62-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2724-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2964-69-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-78-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-63-0x0000000032960000-0x0000000032979000-memory.dmp

Filesize
100KB

Download
memory/2964-67-0x0000000032960000-0x0000000032979000-memory.dmp

Filesize
100KB

Download
memory/2964-66-0x0000000032960000-0x0000000032979000-memory.dmp

Filesize
100KB

Download
memory/2964-36-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-72-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-30-0x0000000076F60000-0x0000000077109000-memory.dmp

Filesize
1.7MB

Download
memory/2964-75-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-33-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-81-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-84-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-87-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-90-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-93-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-96-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-99-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-102-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2964-105-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download