guloader | 3b2c6392ce2ade6f3a5fd949df763736a273dd8daea8057869d692cb8242f066

Analysis

max time kernel
133s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08-02-2024 08:30

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General

Target

tmpeau7xe1h.exe
Size

1.2MB
MD5

bdde3f2fca8eb09969b1dc90579a71e1
SHA1

0b259b48afbf21c5ea9c9ef52c16d15a0e52728f
SHA256

3b2c6392ce2ade6f3a5fd949df763736a273dd8daea8057869d692cb8242f066
SHA512

c6604ce727b9c84ede591c46c7831cdcf1f5df9ec70f45a9e9767901e972ec78e61a553468cd7f92bfbbd25709f4f34d946550df1709291235f8514c43abb1cf
SSDEEP

24576:9SOPcJoogMZ97gucAImvxrHeQywSoP663593VrS74Z/dT:XWoogMj9ImvnPSc/9FXZ1T

Score

10^/10

guloader remcos top downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Top

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
mqerms.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
alpwovnb-G3F5OR
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
Loads dropped DLL 1 IoCs

Processes:

tmpeau7xe1h.exe

pid process

3976 tmpeau7xe1h.exe

pid	process
3976	tmpeau7xe1h.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Distrix = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Mrkeblk\\Microcline.exe"	wab.exe

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

Web Service
T1102

Processes:

flow ioc

48 drive.google.com
49 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

536 wab.exe
536 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

tmpeau7xe1h.exewab.exe

pid process

3976 tmpeau7xe1h.exe
536 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tmpeau7xe1h.exe

description pid process target process

PID 3976 set thread context of 536 3976 tmpeau7xe1h.exe wab.exe
Drops file in Windows directory 1 IoCs

Processes:

tmpeau7xe1h.exe

description ioc process

File created C:\Windows\resources\0409\feriegiros.lnk tmpeau7xe1h.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

780 536 WerFault.exe wab.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

tmpeau7xe1h.exe

pid process

3976 tmpeau7xe1h.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

536 wab.exe

flow	ioc
48	drive.google.com
49	drive.google.com

pid	process
536	wab.exe
536	wab.exe

pid	process
3976	tmpeau7xe1h.exe
536	wab.exe

description	pid	process	target process
PID 3976 set thread context of 536	3976	tmpeau7xe1h.exe	wab.exe

description	ioc	process
File created	C:\Windows\resources\0409\feriegiros.lnk	tmpeau7xe1h.exe

pid	pid_target	process	target process
780	536	WerFault.exe	wab.exe

pid	process
3976	tmpeau7xe1h.exe

pid	process
536	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

tmpeau7xe1h.exe

description	pid	process	target process
PID 3976 wrote to memory of 536	3976	tmpeau7xe1h.exe	wab.exe
PID 3976 wrote to memory of 536	3976	tmpeau7xe1h.exe	wab.exe
PID 3976 wrote to memory of 536	3976	tmpeau7xe1h.exe	wab.exe
PID 3976 wrote to memory of 536	3976	tmpeau7xe1h.exe	wab.exe
PID 3976 wrote to memory of 536	3976	tmpeau7xe1h.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\tmpeau7xe1h.exe
"C:\Users\Admin\AppData\Local\Temp\tmpeau7xe1h.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3976

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\tmpeau7xe1h.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 536 -s 660
3⤵
- Program crash
PID:780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 536 -ip 536
1⤵
PID:3684

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsi25A7.tmp\System.dll
Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/536-24-0x0000000001D20000-0x0000000005008000-memory.dmp

Filesize
50.9MB

Download
memory/536-25-0x0000000077628000-0x0000000077629000-memory.dmp

Filesize
4KB

Download
memory/536-26-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/536-40-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-41-0x0000000001D20000-0x0000000005008000-memory.dmp

Filesize
50.9MB

Download
memory/536-42-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/536-44-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-45-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-43-0x0000000001D20000-0x0000000005008000-memory.dmp

Filesize
50.9MB

Download
memory/536-46-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-47-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-48-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-49-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-50-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-51-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-52-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-53-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-54-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-55-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-56-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-57-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-58-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-59-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-60-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-61-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-64-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-65-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-66-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-67-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-68-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-69-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-70-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-71-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-72-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-73-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-74-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-75-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-76-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-77-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-78-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-79-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-80-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-81-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-82-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-83-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-84-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-85-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-86-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-87-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-88-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-89-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/536-90-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-91-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-92-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-93-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-94-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-95-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-96-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-97-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-98-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-99-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-100-0x0000000000AC0000-0x0000000001D14000-memory.dmp

Filesize
18.3MB

Download
memory/536-155-0x0000000001D20000-0x0000000005008000-memory.dmp

Filesize
50.9MB

Download
memory/3976-20-0x0000000004BE0000-0x0000000007EC8000-memory.dmp

Filesize
50.9MB

Download
memory/3976-21-0x0000000004BE0000-0x0000000007EC8000-memory.dmp

Filesize
50.9MB

Download
memory/3976-22-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/3976-23-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download