remcos | a40626fbe1122175c403f8510e1f6ad41cee213a87ce8252305e32e5071a170a

Analysis

max time kernel
101s
max time network
135s
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

bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
Size

1.7MB
MD5

dffcd11d476c58ec3faa380cc679d6cd
SHA1

809b2bdeb0485b409f0fef3cab124eec8331cc95
SHA256

bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139
SHA512

cf9219060cc1df30f0945fe77964855996d15a93efea373cbee03506335bad7bc02a0f12d82c630d0ec701089a6883bc0f63f9e396c7f53a27cfb5356a050bfd
SSDEEP

24576:0D39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjoIK:0p7E+QrFUBgq2dK

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	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe

Executes dropped EXE 2 IoCs

pid	Process
4672	sbietrcl.exe
3092	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"	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4672 set thread context of 3092	4672	sbietrcl.exe	92

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	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
4672	sbietrcl.exe
4672	sbietrcl.exe
4672	sbietrcl.exe
4672	sbietrcl.exe
4672	sbietrcl.exe
4672	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
Token: SeDebugPrivilege	4672	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3540 wrote to memory of 4672	3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe	91
PID 3540 wrote to memory of 4672	3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe	91
PID 3540 wrote to memory of 4672	3540	bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe	91
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92
PID 4672 wrote to memory of 3092	4672	sbietrcl.exe	92

C:\Users\Admin\AppData\Local\Temp\bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.exe
"C:\Users\Admin\AppData\Local\Temp\bd68ca7605316450c87b9218d2dbe19d8c5694e07b93f320f3ca4a9ad902c139.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:3540
- 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:4672
- - 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:3092

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
1.7MB

MD5
c5371b2338fc27c8674dae5658e2bed4

SHA1
ee56068a45bcaea54e642f9bec3e9748fd13c19e

SHA256
87f6aba2ee3ebef909ecb8493969d91c1df1d20252c67c2c0d194a8ec4d08e4a

SHA512
d7ee242265dba83de8450c475c65bd8c97edc7a54747589f936f837d23db42fcd2edd3f1312d23640195181bd2656b6dfcf97a2472c212d875708a15c5382ffd

Download Submit
memory/3092-35-0x00000000001D0000-0x00000000001E7000-memory.dmp

Filesize
92KB

Download
memory/3540-17-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/3540-3-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/3540-4-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/3540-16-0x0000000074AB2000-0x0000000074AB3000-memory.dmp

Filesize
4KB

Download
memory/3540-0-0x0000000074AB2000-0x0000000074AB3000-memory.dmp

Filesize
4KB

Download
memory/3540-2-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/3540-28-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/3540-1-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/4672-29-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/4672-30-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/4672-31-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/4672-32-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download
memory/4672-39-0x0000000074AB0000-0x0000000075061000-memory.dmp

Filesize
5.7MB

Download