remcos | 1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2023 07:53

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

FAT0987660009800000.exe
Size

394KB
MD5

d6c1329fbb12e8c9c4b3f2cb3d85d74f
SHA1

ace83a713e24f7e226eafa097e38f3608eb1119c
SHA256

1c8d1bd43b0adaeed79d1e91fb3af5d840e9c43b15297dd347f61361ccafb012
SHA512

93fbfb025e237fe8101f7aaa03d9142ebbc883a82eb124066c2882b50fe1adc068c22a1eb87df35842886336fe8e050882454fc85320551c6343d506c82c1146
SSDEEP

12288:C/RmBrhEQbVeASKuUXibskHkVw/WQ+03bm:MRmPEyVOlRiwV+

Score

10^/10

remcos john-pc collection persistence rat spyware stealer upx

Malware Config

Extracted

Family

remcos

Botnet

JOHN-PC

107.175.229.139:8087

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-IN4YDY
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4824-39-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral2/memory/4824-42-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4324-30-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4324-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral2/memory/4324-30-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4824-39-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/4824-42-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/5028-43-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/5028-45-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4324-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
4268	gmcxoyu.exe
4240	gmcxoyu.exe
4324	gmcxoyu.exe
4824	gmcxoyu.exe
5028	gmcxoyu.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

UPX packed file 38 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4240-8-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-10-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-11-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-12-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-13-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-14-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-15-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-16-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-17-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-18-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-19-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-21-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-56-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-58-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-59-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-60-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-61-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-62-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-63-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-64-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-65-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-66-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-67-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-68-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-69-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-70-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-71-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-72-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-73-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-74-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-75-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-76-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-77-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-78-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-79-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-80-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-81-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4240-82-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	gmcxoyu.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-1-5-21-984744499-3605095035-265325720-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\jenscxh = "C:\\Users\\Admin\\AppData\\Roaming\\ajso\\xtdmirbwgcluqa.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\gmcxoyu.exe\" "	gmcxoyu.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4268 set thread context of 4240	4268	gmcxoyu.exe	87
PID 4240 set thread context of 4324	4240	gmcxoyu.exe	97
PID 4240 set thread context of 4824	4240	gmcxoyu.exe	98
PID 4240 set thread context of 5028	4240	gmcxoyu.exe	99

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4324	gmcxoyu.exe
4324	gmcxoyu.exe
5028	gmcxoyu.exe
5028	gmcxoyu.exe
4324	gmcxoyu.exe
4324	gmcxoyu.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4268	gmcxoyu.exe
4240	gmcxoyu.exe
4240	gmcxoyu.exe
4240	gmcxoyu.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5028	gmcxoyu.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 4268	3000	FAT0987660009800000.exe	86
PID 3000 wrote to memory of 4268	3000	FAT0987660009800000.exe	86
PID 3000 wrote to memory of 4268	3000	FAT0987660009800000.exe	86
PID 4268 wrote to memory of 4240	4268	gmcxoyu.exe	87
PID 4268 wrote to memory of 4240	4268	gmcxoyu.exe	87
PID 4268 wrote to memory of 4240	4268	gmcxoyu.exe	87
PID 4268 wrote to memory of 4240	4268	gmcxoyu.exe	87
PID 4240 wrote to memory of 4324	4240	gmcxoyu.exe	97
PID 4240 wrote to memory of 4324	4240	gmcxoyu.exe	97
PID 4240 wrote to memory of 4324	4240	gmcxoyu.exe	97
PID 4240 wrote to memory of 4824	4240	gmcxoyu.exe	98
PID 4240 wrote to memory of 4824	4240	gmcxoyu.exe	98
PID 4240 wrote to memory of 4824	4240	gmcxoyu.exe	98
PID 4240 wrote to memory of 5028	4240	gmcxoyu.exe	99
PID 4240 wrote to memory of 5028	4240	gmcxoyu.exe	99
PID 4240 wrote to memory of 5028	4240	gmcxoyu.exe	99

C:\Users\Admin\AppData\Local\Temp\FAT0987660009800000.exe
"C:\Users\Admin\AppData\Local\Temp\FAT0987660009800000.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe
  "C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4268
- - C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe
    "C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:4240
  - - C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe
      C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe /stext "C:\Users\Admin\AppData\Local\Temp\chvjbfxlkrqbnobnb"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4324
  - - C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe
      C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe /stext "C:\Users\Admin\AppData\Local\Temp\mjatcxieyzigquprsckb"
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      PID:4824
  - - C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe
      C:\Users\Admin\AppData\Local\Temp\gmcxoyu.exe /stext "C:\Users\Admin\AppData\Local\Temp\pefmdqtguhalailvbnxuykp"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
4KB

MD5
2878d4e5cf3f445259717eef565b653d

SHA1
0acce77a54346135628df0ec5e54b808bbd6ff11

SHA256
c97718d36d80005338b0f594c21dfdc2d5345fc05b62f381e5052cfe836595ae

SHA512
016e2cb00529273ca7022fe095861877b61fded3b9713d32765d55d621218dba5ace20ca2122cf5b012777a0ffe4edf8709c9f68490d104d6c79ea458036105d

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

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

Filesize
262KB

MD5
b0d33d32ec83bf9e60304365143ac8a3

SHA1
e1a88f950e207c2b77ad2b1f10be154e8bb13349

SHA256
8cd90d016a38ca66d04073da84740cde47c3356bfb433da50d50ee024f6914f2

SHA512
6b3643447c125e832ade70f88d7f82f426f807619795d744df6242fc87eb7f547f6700e726118f2e14c63a880d91e19c51a6fb5fc2147d4766779908a3dc4c46

Download Submit
C:\Users\Admin\AppData\Local\Temp\qfizar.hxs

Filesize
252KB

MD5
afe362392410004a64e5d386b8bc5739

SHA1
88e413c44394077bc34eb01cf7b5338b2464e8aa

SHA256
5d406f9d2b470ded2c3e31a0530525dd6f97677322194e70e5e52cc236fc31be

SHA512
3b86c64ebf414d45043ce53f2eee79ba21a8c9cb4f07c356c71b0e7a0720718c0036092dd9d9265f3ebaca9de98a85c239a552002964082bd4e46f75dcdca2c8

Download Submit
memory/4240-65-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-68-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-14-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-15-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-16-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-17-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-18-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-19-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-21-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-82-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-12-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-81-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-11-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-80-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-79-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-78-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-10-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-77-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-76-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-75-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-74-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-73-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-72-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-71-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-8-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4240-54-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4240-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4240-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4240-56-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-58-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-59-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-60-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-61-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-62-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-63-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-64-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-70-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-66-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-67-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-13-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4240-69-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/4268-5-0x0000000000A00000-0x0000000000A03000-memory.dmp

Filesize
12KB

Download
memory/4324-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4324-22-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4324-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4324-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4824-31-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4824-42-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4824-39-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4824-25-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/5028-32-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5028-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5028-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5028-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download