remcos | 286e0821c9dff60f28f608fbc48788495e4fc25616f718991a9b1979fce08cac

Analysis

max time kernel
103s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:15

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General

Target

b05f7f78ca8a8285fcaedf481b5ee1df.exe
Size

1.6MB
MD5

b05f7f78ca8a8285fcaedf481b5ee1df
SHA1

468ce88a79124efa42dc6b55842ef8df4592d4b1
SHA256

ed5a2293fc8b4a12153242623be44827fd147f8b4277eb80129960a74c051fb9
SHA512

d31b92af65eb4bf7c3f2550a571a24d19adba0ae33b52cb669a2d9b0304f864a4d7c244033a3db4aae225089162c1401ac4c252b738cd10b0da4dd35a5a56f90
SSDEEP

24576:1D39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjoh:1p7E+QrFUBgq20

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Host

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-1-5-21-3342763580-2723508992-2885672917-1000\Control Panel\International\Geo\Nation	b05f7f78ca8a8285fcaedf481b5ee1df.exe

Executes dropped EXE 2 IoCs

pid	Process
4456	sbietrcl.exe
4748	sbietrcl.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-1-5-21-3342763580-2723508992-2885672917-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	b05f7f78ca8a8285fcaedf481b5ee1df.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4456 set thread context of 4748	4456	sbietrcl.exe	96

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 2 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	b05f7f78ca8a8285fcaedf481b5ee1df.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
4456	sbietrcl.exe
4456	sbietrcl.exe
4456	sbietrcl.exe
4456	sbietrcl.exe
4456	sbietrcl.exe
4456	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe
Token: SeDebugPrivilege	4456	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 4456	1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe	94
PID 1496 wrote to memory of 4456	1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe	94
PID 1496 wrote to memory of 4456	1496	b05f7f78ca8a8285fcaedf481b5ee1df.exe	94
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96
PID 4456 wrote to memory of 4748	4456	sbietrcl.exe	96

C:\Users\Admin\AppData\Local\Temp\b05f7f78ca8a8285fcaedf481b5ee1df.exe
"C:\Users\Admin\AppData\Local\Temp\b05f7f78ca8a8285fcaedf481b5ee1df.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:1496
- 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:4456
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:4748

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
1.6MB

MD5
202486f9dd8bd640a66be74f1532aa74

SHA1
91dd040a451b7eb5ef7a3a274ca13da1503aa141

SHA256
012978bc1da339ea9cb398d49bbec3b7b70e80fe1a2ec14f4991a1037432edfb

SHA512
dcfc02865fa7f505e334cc63f682de5199d125225fc8eb908bc0da38d4fbd663eaa2180806d8c98670acae5bc098e82d50632f8da43f785481b76c7157ff1ae9

Download Submit
memory/1496-17-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1496-28-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1496-3-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1496-4-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1496-16-0x0000000074F02000-0x0000000074F03000-memory.dmp

Filesize
4KB

Download
memory/1496-0-0x0000000074F02000-0x0000000074F03000-memory.dmp

Filesize
4KB

Download
memory/1496-1-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1496-2-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-29-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-30-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-31-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-32-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-39-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4748-35-0x0000000000510000-0x0000000000527000-memory.dmp

Filesize
92KB

Download