remcos | c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4

General

Target

c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
Size

2.2MB
MD5

4cc37ec50a6261f3a3165bf88fd8c4c4
SHA1

471b3058cc49aad6189323676472deae6dee1170
SHA256

c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4
SHA512

99c52e6263afe7960bc59ed56a60ffa248524798338ff61010619129ad17237a9d8402f1b93fce824c9c5f23b0b39ba19db5926dd6bc31634f0c761256fd2e29
SSDEEP

24576:YD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRHM:Yp7E+QrFUBgq2SnJM

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

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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe

Executes dropped EXE 2 IoCs

pid	Process
4276	sbietrcl.exe
4440	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-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4276 set thread context of 4440	4276	sbietrcl.exe	83

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	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
4276	sbietrcl.exe
4276	sbietrcl.exe
4276	sbietrcl.exe
4276	sbietrcl.exe
4276	sbietrcl.exe
4276	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
Token: SeDebugPrivilege	4276	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4440	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5112 wrote to memory of 4276	5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe	82
PID 5112 wrote to memory of 4276	5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe	82
PID 5112 wrote to memory of 4276	5112	c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe	82
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83
PID 4276 wrote to memory of 4440	4276	sbietrcl.exe	83

C:\Users\Admin\AppData\Local\Temp\c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.exe
"C:\Users\Admin\AppData\Local\Temp\c59d16493e4339aec1c817910af350618239980d4b663aa9ff3dfef9f99f6ae4.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:5112
- 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:4276
- - 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:4440

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
2.2MB

MD5
6082774f8f613e84f851e9544debd2fd

SHA1
c483952c20c44c7a3029f016debb866728dad584

SHA256
35afa19d10e50b2e45ae7dadb87d740990be58ac8ce41754d7a0b931e93ea2bc

SHA512
b4613b9100237e0bae21a59d2246dad868dcac2d9eb73a8539739ef30fd40db836dc8af547f3f6a4a50abe1824c819b5ed4bcd5ae0564cb8d67ff20fa17eeb73

Download Submit
memory/4276-46-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/4276-34-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/4276-33-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/4276-32-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/4440-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4440-38-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5112-2-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-19-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-5-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-0-0x00000000754D2000-0x00000000754D3000-memory.dmp

Filesize
4KB

Download
memory/5112-6-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-31-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-30-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-1-0x00000000754D0000-0x0000000075A81000-memory.dmp

Filesize
5.7MB

Download
memory/5112-18-0x00000000754D2000-0x00000000754D3000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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