remcos | a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2024 03:49

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Size

1.1MB
MD5

0f7e8e737582613d9ec805ea627bd1ff
SHA1

0a3aa2d8c65e2e03c900b8a148c1ad53f65289fd
SHA256

a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76
SHA512

b384c1a5eab522bd4058602a1f61411729baef765bf459b5937722e2e974712942111da764bb26a5747b5406453c531c079de3437c2420b5cd5fc8fd802cb8cd
SSDEEP

24576:XCPQ3X6wOmeEXfz0ty9qXo93AkC4rhp3pZ:XC4azmeEvz14Xo95zZ

Score

10^/10

remcos document discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Document

45.138.48.25:3333

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
WinUpdate.exe
copy_folder
WinUpdate
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%Temp%
keylog_crypt
false
keylog_file
WinUpdat.dat
keylog_flag
false
keylog_folder
WinUpdat
mouse_option
false
mutex
Rmc-E10MWO
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
Remcos family
remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1204	powershell.exe
3904	powershell.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WinUpdate.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe

Executes dropped EXE 2 IoCs

pid	Process
2324	WinUpdate.exe
1648	WinUpdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-E10MWO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinUpdate\\WinUpdate.exe\""	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-E10MWO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinUpdate\\WinUpdate.exe\""	WinUpdate.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2328 set thread context of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2324 set thread context of 1648	2324	WinUpdate.exe	106

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	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
1204	powershell.exe
1204	powershell.exe
3904	powershell.exe
3904	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Token: SeDebugPrivilege	1204	powershell.exe
Token: SeDebugPrivilege	3904	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1648	WinUpdate.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 1204	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	97
PID 2328 wrote to memory of 1204	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	97
PID 2328 wrote to memory of 1204	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	97
PID 2328 wrote to memory of 2660	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	99
PID 2328 wrote to memory of 2660	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	99
PID 2328 wrote to memory of 2660	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	99
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 2328 wrote to memory of 4016	2328	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	100
PID 4016 wrote to memory of 2324	4016	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	101
PID 4016 wrote to memory of 2324	4016	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	101
PID 4016 wrote to memory of 2324	4016	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	101
PID 2324 wrote to memory of 3904	2324	WinUpdate.exe	104
PID 2324 wrote to memory of 3904	2324	WinUpdate.exe	104
PID 2324 wrote to memory of 3904	2324	WinUpdate.exe	104
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106
PID 2324 wrote to memory of 1648	2324	WinUpdate.exe	106

C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
"C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1204
- C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
  "C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
  2⤵
  PID:2660
- C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
  "C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4016
- - C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2324
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3904
  - - C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
dc76322be5f333f6b216195b22d7abe9

SHA1
bb67d09be4df2d767b5b7383286360d7f00124d2

SHA256
c03a82ef1a9a58d4c05d220a466c3495e62e838b72c290fd405b3ae9b7938bba

SHA512
f395c96fa38f2d0c200b998c5ed48a3d591306f6a355b81417140f1d50cb5f905acf128686d8e4fd923b98c71cda11b46a0d47914fb64e416f8646c7d2b4725d

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

Filesize
1.1MB

MD5
0f7e8e737582613d9ec805ea627bd1ff

SHA1
0a3aa2d8c65e2e03c900b8a148c1ad53f65289fd

SHA256
a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76

SHA512
b384c1a5eab522bd4058602a1f61411729baef765bf459b5937722e2e974712942111da764bb26a5747b5406453c531c079de3437c2420b5cd5fc8fd802cb8cd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uvqdatob.nsa.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1204-60-0x00000000064E0000-0x00000000064FE000-memory.dmp

Filesize
120KB

Download
memory/1204-48-0x0000000005FC0000-0x000000000600C000-memory.dmp

Filesize
304KB

Download
memory/1204-19-0x0000000002600000-0x0000000002636000-memory.dmp

Filesize
216KB

Download
memory/1204-18-0x00000000751EE000-0x00000000751EF000-memory.dmp

Filesize
4KB

Download
memory/1204-61-0x0000000006F20000-0x0000000006FC3000-memory.dmp

Filesize
652KB

Download
memory/1204-20-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/1204-73-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/1204-70-0x0000000007570000-0x0000000007578000-memory.dmp

Filesize
32KB

Download
memory/1204-69-0x0000000007590000-0x00000000075AA000-memory.dmp

Filesize
104KB

Download
memory/1204-68-0x0000000007490000-0x00000000074A4000-memory.dmp

Filesize
80KB

Download
memory/1204-67-0x0000000007480000-0x000000000748E000-memory.dmp

Filesize
56KB

Download
memory/1204-66-0x0000000007450000-0x0000000007461000-memory.dmp

Filesize
68KB

Download
memory/1204-65-0x00000000074D0000-0x0000000007566000-memory.dmp

Filesize
600KB

Download
memory/1204-64-0x00000000072C0000-0x00000000072CA000-memory.dmp

Filesize
40KB

Download
memory/1204-62-0x0000000007890000-0x0000000007F0A000-memory.dmp

Filesize
6.5MB

Download
memory/1204-63-0x0000000007250000-0x000000000726A000-memory.dmp

Filesize
104KB

Download
memory/1204-32-0x0000000005120000-0x0000000005748000-memory.dmp

Filesize
6.2MB

Download
memory/1204-50-0x0000000070B70000-0x0000000070BBC000-memory.dmp

Filesize
304KB

Download
memory/1204-49-0x0000000006500000-0x0000000006532000-memory.dmp

Filesize
200KB

Download
memory/1204-34-0x0000000004E70000-0x0000000004E92000-memory.dmp

Filesize
136KB

Download
memory/1204-36-0x0000000005800000-0x0000000005866000-memory.dmp

Filesize
408KB

Download
memory/1204-35-0x0000000005090000-0x00000000050F6000-memory.dmp

Filesize
408KB

Download
memory/1204-21-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/1204-42-0x0000000005970000-0x0000000005CC4000-memory.dmp

Filesize
3.3MB

Download
memory/1204-47-0x0000000005F30000-0x0000000005F4E000-memory.dmp

Filesize
120KB

Download
memory/1648-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-118-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-116-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-117-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-115-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-114-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-113-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-112-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-111-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1648-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2328-1-0x0000000000490000-0x00000000005AE000-memory.dmp

Filesize
1.1MB

Download
memory/2328-17-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/2328-6-0x0000000005220000-0x000000000523C000-memory.dmp

Filesize
112KB

Download
memory/2328-8-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/2328-9-0x00000000064C0000-0x0000000006582000-memory.dmp

Filesize
776KB

Download
memory/2328-4-0x00000000751E0000-0x0000000075990000-memory.dmp

Filesize
7.7MB

Download
memory/2328-5-0x0000000005040000-0x000000000504A000-memory.dmp

Filesize
40KB

Download
memory/2328-10-0x000000000A090000-0x000000000A12C000-memory.dmp

Filesize
624KB

Download
memory/2328-2-0x0000000005680000-0x0000000005C24000-memory.dmp

Filesize
5.6MB

Download
memory/2328-3-0x0000000004FA0000-0x0000000005032000-memory.dmp

Filesize
584KB

Download
memory/2328-0-0x00000000751EE000-0x00000000751EF000-memory.dmp

Filesize
4KB

Download
memory/2328-7-0x00000000751EE000-0x00000000751EF000-memory.dmp

Filesize
4KB

Download
memory/3904-96-0x0000000071500000-0x000000007154C000-memory.dmp

Filesize
304KB

Download
memory/3904-107-0x00000000071C0000-0x00000000071D1000-memory.dmp

Filesize
68KB

Download
memory/3904-108-0x0000000007200000-0x0000000007214000-memory.dmp

Filesize
80KB

Download
memory/3904-106-0x0000000006F00000-0x0000000006FA3000-memory.dmp

Filesize
652KB

Download
memory/3904-95-0x0000000005CD0000-0x0000000005D1C000-memory.dmp

Filesize
304KB

Download
memory/3904-93-0x0000000005740000-0x0000000005A94000-memory.dmp

Filesize
3.3MB

Download
memory/4016-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4016-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4016-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4016-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4016-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download