remcos | c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762

General

Target

c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
Size

1.4MB
MD5

6ab5af8965a154d4d0148cbf7508d5b0
SHA1

f793f287916e1c3c39b7883e5161d75b8bf55da6
SHA256

c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762
SHA512

0c03d46c9c9c101bc43a1581dd3f9227bbd71480d4fd0d22acad4b851a2c4dc5198b16522709753ba543b9ccdd73761a4410182238ad47f4c37903bf9a0102dc
SSDEEP

24576:6D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJU:6F+QrFUBgq25eKS

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

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	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe

Executes dropped EXE 2 IoCs

pid	Process
2444	sbietrcl.exe
2596	sbietrcl.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2444 set thread context of 2596	2444	sbietrcl.exe	87

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	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
2444	sbietrcl.exe
2444	sbietrcl.exe
2444	sbietrcl.exe
2444	sbietrcl.exe
2444	sbietrcl.exe
2444	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
Token: SeDebugPrivilege	2444	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2596	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 2444	4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe	82
PID 4616 wrote to memory of 2444	4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe	82
PID 4616 wrote to memory of 2444	4616	c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe	82
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87
PID 2444 wrote to memory of 2596	2444	sbietrcl.exe	87

C:\Users\Admin\AppData\Local\Temp\c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe
"C:\Users\Admin\AppData\Local\Temp\c1d4fab9bdad36905abf360e5839297f587866e96ba6880e445a6a7d98f02762N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4616
- 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:2444
- - 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:2596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

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

2

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\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
1.4MB

MD5
5b352b7263365db87bc6c88140015c6a

SHA1
de9d134b131f634be402aaf0c6aaf5c406d4a1f3

SHA256
ceb3608a8f1c197be085fde4cba2acdffff406e2634fd25d2b0a8f52135f5e5c

SHA512
19bc7b5c6a5136885590d52c6e11c27027c407ea530e70ed0bf53068781a1c920205ee8d21e9c2151886686eb1fd40cd1e0b06385338782cb5b933492210d7a0

Download Submit
memory/2444-45-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2444-34-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2444-33-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2444-32-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2444-31-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/2596-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-46-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4616-2-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/4616-5-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/4616-0-0x0000000074682000-0x0000000074683000-memory.dmp

Filesize
4KB

Download
memory/4616-19-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/4616-6-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/4616-18-0x0000000074682000-0x0000000074683000-memory.dmp

Filesize
4KB

Download
memory/4616-1-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download
memory/4616-29-0x0000000074680000-0x0000000074C31000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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