guloader | dbd18db30b53e23bf5b6385264a66d146164e02fd81d97d47bed98cdb4898f6a

General

Target

Document#.exe
Size

869KB
MD5

4f762156a966f4cd24b41c6fa3dcaa12
SHA1

d7df3aafb76c00928e3dac2db2b5ab9b383f9146
SHA256

dbd18db30b53e23bf5b6385264a66d146164e02fd81d97d47bed98cdb4898f6a
SHA512

3d41498d593df3dfa3c1b84fb9e3859c38a7f6e8bb18f9b25bcbb21f3a71ce52835888628569760dac0b52f1143c0d0b122896a75d45f22e462dc4103bb4638f
SSDEEP

12288:LQQUntE1EKOwtg4WsLsmTk9fLN+cEKPZ/aUfqWARW8coiKEfVr4oeVz6Ao:juC1EKOqg4ZsmTafLUcXZLCrlcos8nq

Score

10^/10

guloader remcos grace&success collection credential_access discovery downloader persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

GRACE&SUCCESS

C2

eweo9264gtuiort.duckdns.org:22740

eweo9264gtuiort.duckdns.org:35966

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
true
install_flag
false
keylog_crypt
false
keylog_file
great.dat
keylog_flag
false
keylog_folder
great
mouse_option
false
mutex
Rmc-GEOGQB
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 8 IoCs

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

resource	yara_rule
behavioral1/memory/1652-55-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1464-59-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1464-61-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1656-60-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1652-53-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1464-64-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1652-69-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1656-74-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1656-60-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/1656-74-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1652-55-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1652-53-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1652-69-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
1316	Document#.exe
1316	Document#.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-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Document#.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Mesua = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Greathead\\Tilgodehavenders.exe"	Document#.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2132	Document#.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1316	Document#.exe
2132	Document#.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1316 set thread context of 2132	1316	Document#.exe	31
PID 2132 set thread context of 1652	2132	Document#.exe	33
PID 2132 set thread context of 1656	2132	Document#.exe	34
PID 2132 set thread context of 1464	2132	Document#.exe	35

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\feltherretitel\superregistration.ini	Document#.exe
File opened for modification	C:\Program Files (x86)\Common Files\telekablernes.ini	Document#.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\clericality\wite.Tek	Document#.exe
File opened for modification	C:\Windows\resources\0409\Enerveredes208.ini	Document#.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	Document#.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Document#.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Document#.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Document#.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Document#.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1652	Document#.exe
1652	Document#.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1316	Document#.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1316	Document#.exe
2132	Document#.exe
2132	Document#.exe
2132	Document#.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	Document#.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2132	Document#.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 1316 wrote to memory of 2132	1316	Document#.exe	31
PID 2132 wrote to memory of 1652	2132	Document#.exe	33
PID 2132 wrote to memory of 1652	2132	Document#.exe	33
PID 2132 wrote to memory of 1652	2132	Document#.exe	33
PID 2132 wrote to memory of 1652	2132	Document#.exe	33
PID 2132 wrote to memory of 1656	2132	Document#.exe	34
PID 2132 wrote to memory of 1656	2132	Document#.exe	34
PID 2132 wrote to memory of 1656	2132	Document#.exe	34
PID 2132 wrote to memory of 1656	2132	Document#.exe	34
PID 2132 wrote to memory of 1464	2132	Document#.exe	35
PID 2132 wrote to memory of 1464	2132	Document#.exe	35
PID 2132 wrote to memory of 1464	2132	Document#.exe	35
PID 2132 wrote to memory of 1464	2132	Document#.exe	35

C:\Users\Admin\AppData\Local\Temp\Document#.exe
"C:\Users\Admin\AppData\Local\Temp\Document#.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1316
- C:\Users\Admin\AppData\Local\Temp\Document#.exe
  "C:\Users\Admin\AppData\Local\Temp\Document#.exe"
  2⤵
  - Adds Run key to start application
  - 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:2132
- - C:\Users\Admin\AppData\Local\Temp\Document#.exe
    C:\Users\Admin\AppData\Local\Temp\Document#.exe /stext "C:\Users\Admin\AppData\Local\Temp\svqudmvzmwtxkpicjfgysilzzoezl"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1652
- - C:\Users\Admin\AppData\Local\Temp\Document#.exe
    C:\Users\Admin\AppData\Local\Temp\Document#.exe /stext "C:\Users\Admin\AppData\Local\Temp\uxwfefftaelkuvwgaqsadvfiavnamntgo"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1656
- - C:\Users\Admin\AppData\Local\Temp\Document#.exe
    C:\Users\Admin\AppData\Local\Temp\Document#.exe /stext "C:\Users\Admin\AppData\Local\Temp\frbxe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1464

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\svqudmvzmwtxkpicjfgysilzzoezl

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nstE65A.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
memory/1316-15-0x0000000003890000-0x00000000062F2000-memory.dmp

Filesize
42.4MB

Download
memory/1316-17-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/1316-16-0x0000000076E41000-0x0000000076F42000-memory.dmp

Filesize
1.0MB

Download
memory/1316-18-0x0000000003890000-0x00000000062F2000-memory.dmp

Filesize
42.4MB

Download
memory/1316-45-0x0000000003890000-0x00000000062F2000-memory.dmp

Filesize
42.4MB

Download
memory/1464-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1464-57-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1464-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1464-64-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1464-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1652-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1652-55-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1652-69-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1652-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1652-50-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1656-56-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1656-60-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1656-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1656-74-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2132-47-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-41-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-21-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-19-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/2132-75-0x0000000035010000-0x0000000035029000-memory.dmp

Filesize
100KB

Download
memory/2132-79-0x0000000035010000-0x0000000035029000-memory.dmp

Filesize
100KB

Download
memory/2132-78-0x0000000035010000-0x0000000035029000-memory.dmp

Filesize
100KB

Download
memory/2132-80-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-81-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-82-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-83-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-84-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-85-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-86-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-87-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download
memory/2132-88-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads