remcos | dbb91efc31fbf89d7600d6ccf15e1e2febe432b3d757adce1269582611680f6c

Analysis

max time kernel
125s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05/07/2024, 23:04

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General

Target
14b8fe3379ea539ff8351ebbd4420330.exe
Size 2.0MB
Sample240705-22be7sycjm
SHA256 dbb91efc31fbf89d7600d6ccf15e1e2febe432b3d757adce1269582611680f6c
MD5 14b8fe3379ea539ff8351ebbd4420330
SHA1 df611ed161ffc9a59a021929d9281d5af7d00011
SHA512 f25d06328ee7bb33145b2e5ab8b0fb029e1913f8c6f08af8c8d449a4405849c3aee543da48721be8af18629132cf1aca0820448a73a4daef68de0f599aa29bb1
SSDEEP 24576:AD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4+n:Ap7E+QrFUBgq2C
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos host 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

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-1-5-21-661257284-3186977026-4220467887-1000\Control Panel\International\Geo\Nation	14b8fe3379ea539ff8351ebbd4420330.exe

Executes dropped EXE 2 IoCs

pid	Process
4280	sbietrcl.exe
4984	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-1-5-21-661257284-3186977026-4220467887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	14b8fe3379ea539ff8351ebbd4420330.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4280 set thread context of 4984	4280	sbietrcl.exe	93

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1488	14b8fe3379ea539ff8351ebbd4420330.exe
1488	14b8fe3379ea539ff8351ebbd4420330.exe
1488	14b8fe3379ea539ff8351ebbd4420330.exe
1488	14b8fe3379ea539ff8351ebbd4420330.exe
1488	14b8fe3379ea539ff8351ebbd4420330.exe
1488	14b8fe3379ea539ff8351ebbd4420330.exe
4280	sbietrcl.exe
4280	sbietrcl.exe
4280	sbietrcl.exe
4280	sbietrcl.exe
4280	sbietrcl.exe
4280	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1488	14b8fe3379ea539ff8351ebbd4420330.exe
Token: SeDebugPrivilege	4280	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 4280	1488	14b8fe3379ea539ff8351ebbd4420330.exe	92
PID 1488 wrote to memory of 4280	1488	14b8fe3379ea539ff8351ebbd4420330.exe	92
PID 1488 wrote to memory of 4280	1488	14b8fe3379ea539ff8351ebbd4420330.exe	92
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93
PID 4280 wrote to memory of 4984	4280	sbietrcl.exe	93

C:\Users\Admin\AppData\Local\Temp\14b8fe3379ea539ff8351ebbd4420330.exe
"C:\Users\Admin\AppData\Local\Temp\14b8fe3379ea539ff8351ebbd4420330.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488
- 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
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4280
- - 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:4984

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3848,i,15168044379859864039,3380316340477469860,262144 --variations-seed-version --mojo-platform-channel-handle=4092 /prefetch:8
1⤵
PID:3904

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

sbietrcl.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
Size 2.0MB
SHA256 68549fcbed378257cd1abe19fa4b07dba2b6d95ed77329f90f3e02b5313bbb5d
MD5 3e79dbda0e2d5d00f644e2849150a1ee
SHA1 9e235002a4c309a6696ada8f4814f4280a840c78
SHA512 da36726c907216e57acb9c2a8b1de84c282a07128a0f2df0242bffdf2f6dde151aeaaf8a3512628d70c614574bbdd0e2b5e4992373ec97fbbaa2f4249e3ab5f4
SSDEEP 24576:hD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4+57:hp7E+QrFUBgq207
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1488-29-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/1488-2-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/1488-5-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/1488-6-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/1488-1-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/1488-0-0x0000000074922000-0x0000000074923000-memory.dmp

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memory/4280-30-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/4280-28-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/4280-31-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/4280-32-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/4280-39-0x0000000074920000-0x0000000074ED1000-memory.dmp

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memory/4984-35-0x00000000003D0000-0x00000000003E7000-memory.dmp

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