guloader | 20421f80185ce3c93795eac31090d79cad1bdbe360c1c8d7da261fe66edde7c0

General

Target

8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe
Size

517KB
MD5

7b60abf4b403f6b10d43ae3c0559eb72
SHA1

7211b8be413c5cb8bce4cc439a20d4df8cf8329d
SHA256

8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee
SHA512

2c5d00faf08c03d01bf49f658809903fe4ac78f19fb35a17aab3de78f5bd8510df50f54030a1fad5191d040653ff33415f466b23daf426d20bb8f95624d49c5b
SSDEEP

12288:IjOK3DWAvnkbZzhb50GZTNpSSZyNDTN6BwoshI17UhshD0cv:6/zZkbZH9pB0V4RvxUiFF

Score

10^/10

guloader remcos chima discovery downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Chima

C2

naps.is-into-games.com:53648

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-67ZM90
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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
33	3176	Process not Found

Loads dropped DLL 1 IoCs

pid	Process
872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.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-1-5-21-189444705-1272902858-1305688695-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Troweling = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Trivalve\\Brugerskarerne.exe"	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2508	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe
2508	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.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 3 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	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
212	MicrosoftEdgeUpdate.exe

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral1/files/0x000b000000023d25-23.dat	nsis_installer_1
behavioral1/files/0x000b000000023d25-23.dat	nsis_installer_2

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2508	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 872 wrote to memory of 2508	872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe	91
PID 872 wrote to memory of 2508	872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe	91
PID 872 wrote to memory of 2508	872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe	91
PID 872 wrote to memory of 2508	872	8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe	91

C:\Users\Admin\AppData\Local\Temp\8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe
"C:\Users\Admin\AppData\Local\Temp\8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:872
- C:\Users\Admin\AppData\Local\Temp\8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe
  "C:\Users\Admin\AppData\Local\Temp\8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2508

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI2IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5MjEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE5ODA3NzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0Nzc1NjE2Njg3Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:212

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

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
8371c068fc6d42e03994775869028056

SHA1
a9d192134e0ef217d53a662321c0cccf732cd201

SHA256
b6772fa30b51a3dd1632b12b132fe122146a31b4ce48fe3ff67b0fc9bdc67bee

SHA512
5157df99841671dd8c7b63e6858108b3949356e6fe07afedc78774fada349f78898205fc72b270eb8d46b91f81cac9d3af07f0a9d74192adb97d553f5705abcc

Download Submit
C:\Users\Admin\AppData\Local\Temp\Trivalve\Brugerskarerne.exe

Filesize
517KB

MD5
7b60abf4b403f6b10d43ae3c0559eb72

SHA1
7211b8be413c5cb8bce4cc439a20d4df8cf8329d

SHA256
8b51c970ee535afb8f8279e82c1cd2cc28b76fdd05ee96a8fed97be7421f8eee

SHA512
2c5d00faf08c03d01bf49f658809903fe4ac78f19fb35a17aab3de78f5bd8510df50f54030a1fad5191d040653ff33415f466b23daf426d20bb8f95624d49c5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nso8290.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/872-15-0x00000000049D0000-0x00000000063F8000-memory.dmp

Filesize
26.2MB

Download
memory/872-16-0x0000000076EB1000-0x0000000076FD1000-memory.dmp

Filesize
1.1MB

Download
memory/872-20-0x00000000733F5000-0x00000000733F6000-memory.dmp

Filesize
4KB

Download
memory/872-19-0x00000000049D0000-0x00000000063F8000-memory.dmp

Filesize
26.2MB

Download
memory/872-21-0x00000000049D0000-0x00000000063F8000-memory.dmp

Filesize
26.2MB

Download
memory/2508-22-0x00000000016B0000-0x00000000030D8000-memory.dmp

Filesize
26.2MB

Download
memory/2508-26-0x00000000016B0000-0x00000000030D8000-memory.dmp

Filesize
26.2MB

Download
memory/2508-45-0x0000000000450000-0x00000000016A4000-memory.dmp

Filesize
18.3MB

Download
memory/2508-49-0x00000000016B0000-0x00000000030D8000-memory.dmp

Filesize
26.2MB

Download
memory/2508-50-0x0000000000450000-0x00000000016A4000-memory.dmp

Filesize
18.3MB

Download
memory/2508-53-0x0000000000450000-0x00000000016A4000-memory.dmp

Filesize
18.3MB

Download
memory/2508-25-0x0000000000450000-0x00000000016A4000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads