remcos | a23fdeddb683f716be744ef3fe9a8ce2c87b02f5e5c1f6c8bdb70881de528304

Analysis

max time kernel
102s
max time network
149s
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, 06:16

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General

Target

cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
Size

1.8MB
MD5

dc3e79dfedf92a612126b15d8f7c2689
SHA1

0e263e234e10b2064c7f567a8712272968ed9a59
SHA256

cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9
SHA512

b1f0d3c929e61eb10affb637b1f4740dcf058c1ac0b71059112acd9f4689c208153140fb2342d7b08a92251e3613e775d768bd1aa11238d21b66fa2d11baf673
SSDEEP

24576:ID39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6Y:IF+QrFUBgq25eKu6Y

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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe

Executes dropped EXE 2 IoCs

pid	Process
5196	sbietrcl.exe
1840	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-1-5-21-308834014-1004923324-1191300197-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5196 set thread context of 1840	5196	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	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
5196	sbietrcl.exe
5196	sbietrcl.exe
5196	sbietrcl.exe
5196	sbietrcl.exe
5196	sbietrcl.exe
5196	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
Token: SeDebugPrivilege	5196	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 5196	3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	94
PID 3952 wrote to memory of 5196	3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	94
PID 3952 wrote to memory of 5196	3952	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	94
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96
PID 5196 wrote to memory of 1840	5196	sbietrcl.exe	96

C:\Users\Admin\AppData\Local\Temp\cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
"C:\Users\Admin\AppData\Local\Temp\cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.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:3952
- 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:5196
- - 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:1840

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
1.9MB

MD5
50c25d13ecb1cf3590feecea175d7d2f

SHA1
65e41fdc0e32782b8eddb0738ebb9d6b6ab0ec24

SHA256
49b2528799f754874a16f5f7b9d2e259cd4b50c56f41315e7ee677d4f62b1b5a

SHA512
39e54abe0889b1713611ef836cee9128bcbef48e4ad4a685fd627d491aeb4370f916256d1ea5aa6f72531c9f17a04dac8e714708a72381595c08a37d8d344118

Download Submit
memory/1840-36-0x0000000000600000-0x0000000000617000-memory.dmp

Filesize
92KB

Download
memory/3952-30-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-1-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-2-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-3-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-4-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-16-0x0000000075432000-0x0000000075433000-memory.dmp

Filesize
4KB

Download
memory/3952-17-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/3952-0-0x0000000075432000-0x0000000075433000-memory.dmp

Filesize
4KB

Download
memory/3952-29-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/5196-28-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/5196-32-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/5196-33-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/5196-31-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/5196-40-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download