remcos | fbc7ea811a9cc4d78986918a1c07a6c6fc9f4be6e5ea4952ad76fb7b23c752af

Analysis

max time kernel
149s
max time network
144s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
06-12-2024 10:13

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General

Target

cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe
Size

224KB
MD5

cc729b8c1f1d7f050ca51d488f2572e2
SHA1

82b30570a2d787ffa79834f55e97127c2f1f08af
SHA256

fbc7ea811a9cc4d78986918a1c07a6c6fc9f4be6e5ea4952ad76fb7b23c752af
SHA512

ca09a774d0cc0225aadbba1919411c56fe52f083a62bddab07e891b9231566ea342a8fb13623afafe8141f782485d62f310506f5e07267c2a6033382ea29d5ec
SSDEEP

6144:lnOBWg8BRGHbLegPMEGSu7YG/vXYiMWt5CAVJbc15:yp8BRsbWELGo7w1VW15

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan upx

Malware Config

Extracted

Family

remcos

Version

3.1.1 Pro

Botnet

RemoteHost

192.168.8.104:2405

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
svchost.exe
copy_folder
Svchost
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
JRE
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-HYK6L3
screenshot_crypt
true
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

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

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Executes dropped EXE 1 IoCs

pid	Process
2740	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
2404	cmd.exe
2404	cmd.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Svchost\\svchost.exe\""	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Svchost\\svchost.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Svchost\\svchost.exe\""	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2740 set thread context of 2780	2740	svchost.exe	38
PID 2780 set thread context of 2992	2780	iexplore.exe	44

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2096-0-0x0000000000840000-0x00000000008C2000-memory.dmp	upx
behavioral1/memory/2096-7-0x0000000000840000-0x00000000008C2000-memory.dmp	upx
behavioral1/files/0x0008000000016c66-9.dat	upx
behavioral1/memory/2780-15-0x0000000000400000-0x0000000000482000-memory.dmp	upx
behavioral1/memory/2740-14-0x0000000000890000-0x0000000000912000-memory.dmp	upx
behavioral1/memory/2740-17-0x0000000000890000-0x0000000000912000-memory.dmp	upx
behavioral1/memory/2992-30-0x0000000000400000-0x0000000000482000-memory.dmp	upx
behavioral1/memory/2992-31-0x0000000000400000-0x0000000000482000-memory.dmp	upx
behavioral1/memory/2992-26-0x0000000000400000-0x0000000000482000-memory.dmp	upx
behavioral1/memory/2992-24-0x0000000000400000-0x0000000000482000-memory.dmp	upx

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 11 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	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2384	reg.exe
2996	reg.exe
2804	reg.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2740	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2780	iexplore.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 1028	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	30
PID 2096 wrote to memory of 1028	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	30
PID 2096 wrote to memory of 1028	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	30
PID 2096 wrote to memory of 1028	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	30
PID 1028 wrote to memory of 2384	1028	cmd.exe	32
PID 1028 wrote to memory of 2384	1028	cmd.exe	32
PID 1028 wrote to memory of 2384	1028	cmd.exe	32
PID 1028 wrote to memory of 2384	1028	cmd.exe	32
PID 2096 wrote to memory of 2100	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	33
PID 2096 wrote to memory of 2100	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	33
PID 2096 wrote to memory of 2100	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	33
PID 2096 wrote to memory of 2100	2096	cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe	33
PID 2100 wrote to memory of 2404	2100	WScript.exe	34
PID 2100 wrote to memory of 2404	2100	WScript.exe	34
PID 2100 wrote to memory of 2404	2100	WScript.exe	34
PID 2100 wrote to memory of 2404	2100	WScript.exe	34
PID 2404 wrote to memory of 2740	2404	cmd.exe	36
PID 2404 wrote to memory of 2740	2404	cmd.exe	36
PID 2404 wrote to memory of 2740	2404	cmd.exe	36
PID 2404 wrote to memory of 2740	2404	cmd.exe	36
PID 2740 wrote to memory of 2756	2740	svchost.exe	37
PID 2740 wrote to memory of 2756	2740	svchost.exe	37
PID 2740 wrote to memory of 2756	2740	svchost.exe	37
PID 2740 wrote to memory of 2756	2740	svchost.exe	37
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2740 wrote to memory of 2780	2740	svchost.exe	38
PID 2780 wrote to memory of 2868	2780	iexplore.exe	40
PID 2780 wrote to memory of 2868	2780	iexplore.exe	40
PID 2780 wrote to memory of 2868	2780	iexplore.exe	40
PID 2780 wrote to memory of 2868	2780	iexplore.exe	40
PID 2756 wrote to memory of 2804	2756	cmd.exe	42
PID 2756 wrote to memory of 2804	2756	cmd.exe	42
PID 2756 wrote to memory of 2804	2756	cmd.exe	42
PID 2756 wrote to memory of 2804	2756	cmd.exe	42
PID 2868 wrote to memory of 2996	2868	cmd.exe	43
PID 2868 wrote to memory of 2996	2868	cmd.exe	43
PID 2868 wrote to memory of 2996	2868	cmd.exe	43
PID 2868 wrote to memory of 2996	2868	cmd.exe	43
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44
PID 2780 wrote to memory of 2992	2780	iexplore.exe	44

C:\Users\Admin\AppData\Local\Temp\cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cc729b8c1f1d7f050ca51d488f2572e2_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1028
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2384
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Svchost\svchost.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2404
  - - C:\Users\Admin\AppData\Roaming\Svchost\svchost.exe
      C:\Users\Admin\AppData\Roaming\Svchost\svchost.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:2740
    - - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2756
      - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2804
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        5⤵
        Adds Run key to start application
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2780
      - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2868
        
        C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        7⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2996
      - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        6⤵
        
        PID:2992

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
422B

MD5
28f7c9f293bd54fc800cabccfc9361af

SHA1
6361ba75e4d8cbf849313bd0c56ba5579e372ba9

SHA256
5250e980a12f9105709a9584f460bfdc7f1446d4bcb4f26f8f649367ef467799

SHA512
08c646ffad1c517e01a1076ba5ee827a6e2d16a20c8bc8f47d06eda05ba5962cf177aea1f8238f4bd841df22773072e0099d8f2dbc6bd708259d18fdbf9e3cd9

Download Submit
\Users\Admin\AppData\Roaming\Svchost\svchost.exe

Filesize
224KB

MD5
cc729b8c1f1d7f050ca51d488f2572e2

SHA1
82b30570a2d787ffa79834f55e97127c2f1f08af

SHA256
fbc7ea811a9cc4d78986918a1c07a6c6fc9f4be6e5ea4952ad76fb7b23c752af

SHA512
ca09a774d0cc0225aadbba1919411c56fe52f083a62bddab07e891b9231566ea342a8fb13623afafe8141f782485d62f310506f5e07267c2a6033382ea29d5ec

Download Submit
memory/2096-0-0x0000000000840000-0x00000000008C2000-memory.dmp

Filesize
520KB

Download
memory/2096-7-0x0000000000840000-0x00000000008C2000-memory.dmp

Filesize
520KB

Download
memory/2404-12-0x0000000000130000-0x00000000001B2000-memory.dmp

Filesize
520KB

Download
memory/2740-14-0x0000000000890000-0x0000000000912000-memory.dmp

Filesize
520KB

Download
memory/2740-17-0x0000000000890000-0x0000000000912000-memory.dmp

Filesize
520KB

Download
memory/2780-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2992-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download