remcos | 0aef5fd40527e7ab78039802a026b1268a330c6580eb1b5bb11ae29137de3d2c

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-12-2024 01:32

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General

Target

c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Size

776KB
MD5

c541ef92d5024981da22c4cd0a7884be
SHA1

554c2af624c1d1f36d522bbdad0860cc05e4fb31
SHA256

0aef5fd40527e7ab78039802a026b1268a330c6580eb1b5bb11ae29137de3d2c
SHA512

89059237ff2d332016b9ed49946b31042be61a349b53a4a415e18ab67976d3c12ecfdd9b6311162b56d6d82dd8807cdda4bf43e3fff263af60cb8cb4343eab8f
SSDEEP

12288:8XV1Vt7syT8RJJ58bOZmZHGGPVo5yOnperQvBXtvldA93LYzxOd6:8nVtYyKp2zPPOpXvBXtvlg0Ad6

Score

10^/10

remcos remotehost-5778 discovery evasion execution persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

3.1.4 Pro

Botnet

RemoteHost-5778

5778.hopto.org:5778

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-8NVW4R
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

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

Windows security bypass 2 TTPs 3 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2692	powershell.exe
1452	powershell.exe
2828	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\AEr4m1E69bc29s = "C:\\Windows\\Resources\\Themes\\E4GaIu5fec68eP8\\svchost.exe"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1648 set thread context of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
File created	C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2692	powershell.exe
1452	powershell.exe
2828	powershell.exe
1452	powershell.exe
2828	powershell.exe
2692	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	1452	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 2692	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	84
PID 1648 wrote to memory of 2692	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	84
PID 1648 wrote to memory of 2692	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	84
PID 1648 wrote to memory of 1452	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	86
PID 1648 wrote to memory of 1452	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	86
PID 1648 wrote to memory of 1452	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	86
PID 1648 wrote to memory of 2828	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	88
PID 1648 wrote to memory of 2828	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	88
PID 1648 wrote to memory of 2828	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	88
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90
PID 1648 wrote to memory of 3620	1648	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	90

C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe"
1⤵
- Windows security bypass
- Checks computer location settings
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- 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\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1452
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2828
- C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:3620

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

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

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

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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
0b2494901c3259693493f07543f08ef5

SHA1
f4d23c1a796c60ca9e6bd4959a2a3f8054d957c7

SHA256
cf60e5ecfa803f3f0dd6b3b06665236c50bda6a7081635e601a807a2186ef321

SHA512
f6a982828a324f0e656e43c3734c87fc105ef5534c756df038cb1ef961d2b948e82b5693ab8c823d427b8a9d4887c55d9bb7f44db75332ec0a2ee3b8b229a7b1

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

Filesize
18KB

MD5
85a9ca7c6ce3bb53a3c924f73899a552

SHA1
996e1437f47e4f6f5d95668eeac18b41c48533ff

SHA256
6b53dd526925cbad11f7306fe5fe22f9264fb27fcc81203a83240680368168f3

SHA512
941fde9eb55be02c93a98ccfcef5caa9e3eb0c76455d35d4fd78165fb955c78189b9654fb6e2126210af40c14b568ddf3e8e424f85ba8b705ebb58741986b740

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mv04t1fe.v2w.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
286B

MD5
9b03d31c0d5bba829ee9289a41a18127

SHA1
9b9d011445dde54a58092c7b20f0e0d89f7ee5d2

SHA256
42301c416a2d8bbf2f4098bad963cae795224f4131de08a4cb07335a77517d5d

SHA512
5e2831c68bf1b81888d0a7369950458fd18d60311d98adab7d17621259ec491c5182c5cb28a61de5b0702a545852280744a8df565f5fe7b279142f140999431f

Download Submit
memory/1452-102-0x0000000007E80000-0x0000000007E8E000-memory.dmp

Filesize
56KB

Download
memory/1452-15-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/1452-24-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/1452-63-0x00000000069B0000-0x00000000069FC000-memory.dmp

Filesize
304KB

Download
memory/1452-87-0x0000000070BB0000-0x0000000070BFC000-memory.dmp

Filesize
304KB

Download
memory/1452-100-0x0000000007ED0000-0x0000000007F66000-memory.dmp

Filesize
600KB

Download
memory/1452-115-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/1452-101-0x0000000007E50000-0x0000000007E61000-memory.dmp

Filesize
68KB

Download
memory/1452-103-0x0000000007E90000-0x0000000007EA4000-memory.dmp

Filesize
80KB

Download
memory/1648-12-0x0000000006810000-0x00000000068A2000-memory.dmp

Filesize
584KB

Download
memory/1648-19-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/1648-2-0x0000000005410000-0x0000000005486000-memory.dmp

Filesize
472KB

Download
memory/1648-14-0x0000000005980000-0x000000000598A000-memory.dmp

Filesize
40KB

Download
memory/1648-1-0x00000000009F0000-0x0000000000AB8000-memory.dmp

Filesize
800KB

Download
memory/1648-3-0x0000000005530000-0x00000000055CC000-memory.dmp

Filesize
624KB

Download
memory/1648-6-0x00000000053C0000-0x00000000053DE000-memory.dmp

Filesize
120KB

Download
memory/1648-4-0x00000000055D0000-0x0000000005692000-memory.dmp

Filesize
776KB

Download
memory/1648-5-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/1648-7-0x0000000005D60000-0x0000000006304000-memory.dmp

Filesize
5.6MB

Download
memory/1648-0-0x0000000074F9E000-0x0000000074F9F000-memory.dmp

Filesize
4KB

Download
memory/2692-44-0x0000000005790000-0x0000000005AE4000-memory.dmp

Filesize
3.3MB

Download
memory/2692-99-0x0000000007100000-0x000000000710A000-memory.dmp

Filesize
40KB

Download
memory/2692-38-0x0000000005720000-0x0000000005786000-memory.dmp

Filesize
408KB

Download
memory/2692-36-0x0000000004E90000-0x0000000004EB2000-memory.dmp

Filesize
136KB

Download
memory/2692-9-0x0000000004790000-0x00000000047C6000-memory.dmp

Filesize
216KB

Download
memory/2692-10-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2692-11-0x0000000004F20000-0x0000000005548000-memory.dmp

Filesize
6.2MB

Download
memory/2692-114-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2692-37-0x0000000005600000-0x0000000005666000-memory.dmp

Filesize
408KB

Download
memory/2692-75-0x0000000070BB0000-0x0000000070BFC000-memory.dmp

Filesize
304KB

Download
memory/2692-85-0x0000000006F20000-0x0000000006F3E000-memory.dmp

Filesize
120KB

Download
memory/2692-13-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2692-105-0x00000000073A0000-0x00000000073A8000-memory.dmp

Filesize
32KB

Download
memory/2692-104-0x00000000073C0000-0x00000000073DA000-memory.dmp

Filesize
104KB

Download
memory/2692-23-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2828-62-0x0000000006040000-0x000000000605E000-memory.dmp

Filesize
120KB

Download
memory/2828-108-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2828-97-0x00000000079C0000-0x000000000803A000-memory.dmp

Filesize
6.5MB

Download
memory/2828-65-0x0000000070BB0000-0x0000000070BFC000-memory.dmp

Filesize
304KB

Download
memory/2828-18-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2828-21-0x0000000074F90000-0x0000000075740000-memory.dmp

Filesize
7.7MB

Download
memory/2828-98-0x0000000007380000-0x000000000739A000-memory.dmp

Filesize
104KB

Download
memory/2828-64-0x0000000006FE0000-0x0000000007012000-memory.dmp

Filesize
200KB

Download
memory/2828-86-0x0000000007050000-0x00000000070F3000-memory.dmp

Filesize
652KB

Download
memory/3620-20-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-22-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-16-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-25-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-57-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-58-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-117-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3620-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download