remcos | b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692

General

Target

b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
Size

1.9MB
MD5

43cb13d13f2590f07d16013ee6bc164d
SHA1

e66f702be42e38f06a004db0b26be4629a2f79d1
SHA256

b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692
SHA512

2afcf8eee71c168f562f3c599ea5b880a672f0e6e4439934972d9fd9a01bf4dd967bb600898f0f626440c53d5cb327c873cdfef8487938b854f38a1ae1af451a
SSDEEP

24576:AD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6jv1:AF+QrFUBgq25eKu6jv1

Score

10^/10

remcos host discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
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

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Executes dropped EXE 2 IoCs

pid	Process
2192	sbietrcl.exe
2868	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2192 set thread context of 2868	2192	sbietrcl.exe	34

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	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
2192	sbietrcl.exe
2192	sbietrcl.exe
2192	sbietrcl.exe
2192	sbietrcl.exe
2192	sbietrcl.exe
2192	sbietrcl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2904	explorer.exe

Suspicious use of AdjustPrivilegeToken 14 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeDebugPrivilege	2192	sbietrcl.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe
Token: SeShutdownPrivilege	2904	explorer.exe

Suspicious use of FindShellTrayWindow 30 IoCs

pid	Process
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe

Suspicious use of SendNotifyMessage 20 IoCs

pid	Process
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe
2904	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2192	2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe	32
PID 2280 wrote to memory of 2192	2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe	32
PID 2280 wrote to memory of 2192	2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe	32
PID 2280 wrote to memory of 2192	2280	b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe	32
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34
PID 2192 wrote to memory of 2868	2192	sbietrcl.exe	34

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe
"C:\Users\Admin\AppData\Local\Temp\b6d5b071308b14539cd81180e8e237040dba77f71aef5711e2c9183ed8081692.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2868

C:\Windows\explorer.exe
explorer.exe
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab6E4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
1.9MB

MD5
89afbd127b21a81298b23c3f3666f101

SHA1
a59375670713ebfe6a99c9167ff59dd3b71af062

SHA256
10c4f61c825d5d88af264295b73f15db69436c84f225b35cb97caddc7ef96ca4

SHA512
c08d994876486c7b8d7d7421145b4da24581a7c0cd8d06a18aeaa235871091893c2c7dac3923cddae1bc97ef16175d4081b9febe9b3f9b229dbe92610af89469

Download Submit
memory/2280-0-0x00000000741C1000-0x00000000741C2000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2280-2-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2280-10-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2280-11-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2280-23-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2280-30-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2868-55-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-51-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-52-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-48-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-56-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-46-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-38-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads