guloader | e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-10-2024 02:57

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General

Target

e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
Size

1.0MB
MD5

3ac10da2561b50bc38b8c8e328850965
SHA1

4fcd399954d96ff5ed99e1e142049441ff40e5e9
SHA256

e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f
SHA512

32652516c763628831e9fde805054cd706d1a32f67569f6187ea5198f580c7aecfa3d5fecb1f808e5e060837aba9bbf1cd182285e2161d8945a727cc1f54ca1b
SSDEEP

24576:RYPWVKIQMfAmKIPHi70rXV0TP0TDAS3y7zIeYOCW/yVXiCIVl1:REW0IQYfw0dnguxW+Xi9Vn

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

162.251.122.111:2404

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-JXEKG5
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

Detected Nirsoft tools 9 IoCs

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

resource	yara_rule
behavioral1/memory/1592-48-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1592-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/840-44-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2656-43-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2656-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/840-41-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1592-51-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2656-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/840-60-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/840-44-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/840-41-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/840-60-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2656-43-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2656-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2656-56-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2960 set thread context of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2424 set thread context of 2656	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	32
PID 2424 set thread context of 840	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	33
PID 2424 set thread context of 1592	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	34

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\vedtgtsmssiges\Opening139.str	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.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	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2656	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
2656	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1592	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2960 wrote to memory of 2424	2960	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	28
PID 2424 wrote to memory of 2656	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	32
PID 2424 wrote to memory of 2656	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	32
PID 2424 wrote to memory of 2656	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	32
PID 2424 wrote to memory of 2656	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	32
PID 2424 wrote to memory of 840	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	33
PID 2424 wrote to memory of 840	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	33
PID 2424 wrote to memory of 840	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	33
PID 2424 wrote to memory of 840	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	33
PID 2424 wrote to memory of 1592	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	34
PID 2424 wrote to memory of 1592	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	34
PID 2424 wrote to memory of 1592	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	34
PID 2424 wrote to memory of 1592	2424	e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe	34

C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
"C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.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:2960
- C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
  "C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.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:2424
- - C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
    C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe /stext "C:\Users\Admin\AppData\Local\Temp\kuggzo"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2656
- - C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
    C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe /stext "C:\Users\Admin\AppData\Local\Temp\uolrzhglg"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:840
- - C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe
    C:\Users\Admin\AppData\Local\Temp\e3fe07f87b41a5b796c4bf9d657c482367668ea4de33fa86bf6bc75b9904357f.exe /stext "C:\Users\Admin\AppData\Local\Temp\fqqjazrmucxw"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1592

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
203bf85e8e84991125db6ce481400ca5

SHA1
c7067401f77dfb46f04e8f4bdef87a71e2479ff0

SHA256
0abdf22de3af8d0abd1e62208791d3d9271ab60dcdcf4d20b96834ed54356e49

SHA512
c97f6738b4565afea9bdd211b79ce4ece218e6565ac9a8ea7b579c2a9d6fee7c75fcacfbd54562305573d8ca00074789105c2d3b9ac5fdf370d6ea17eec12025

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsi5B7A.tmp\System.dll

Filesize
11KB

MD5
fc90dfb694d0e17b013d6f818bce41b0

SHA1
3243969886d640af3bfa442728b9f0dff9d5f5b0

SHA256
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528

SHA512
324f13aa7a33c6408e2a57c3484d1691ecee7c3c1366de2bb8978c8dc66b18425d8cab5a32d1702c13c43703e36148a022263de7166afdce141da2b01169f1c6

Download Submit
memory/840-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/840-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/840-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/840-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/840-60-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1592-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1592-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1592-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1592-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1592-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2424-66-0x00000000339C0000-0x00000000339D9000-memory.dmp

Filesize
100KB

Download
memory/2424-19-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-36-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-31-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-28-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-25-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-23-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-91-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-88-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-67-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-85-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-82-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-17-0x0000000076FC0000-0x0000000077169000-memory.dmp

Filesize
1.7MB

Download
memory/2424-79-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-77-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-74-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-62-0x00000000339C0000-0x00000000339D9000-memory.dmp

Filesize
100KB

Download
memory/2424-71-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2424-65-0x00000000339C0000-0x00000000339D9000-memory.dmp

Filesize
100KB

Download
memory/2656-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2656-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2656-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2656-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2656-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2960-14-0x0000000003450000-0x0000000004975000-memory.dmp

Filesize
21.1MB

Download
memory/2960-16-0x0000000076FC0000-0x0000000077169000-memory.dmp

Filesize
1.7MB

Download
memory/2960-15-0x0000000076FC1000-0x00000000770C2000-memory.dmp

Filesize
1.0MB

Download
memory/2960-18-0x0000000003450000-0x0000000004975000-memory.dmp

Filesize
21.1MB

Download