remcos | d5ecd3f6efc58f4336dbf0682bf053114e84f95d4b37927eba9643b91e8f6789

General

Target

a7fab95ea927cb0689b8d40e1bb63790N.exe
Size

2.2MB
MD5

a7fab95ea927cb0689b8d40e1bb63790
SHA1

0c76883e998efb9aca8604a00842d5a64960013c
SHA256

d5ecd3f6efc58f4336dbf0682bf053114e84f95d4b37927eba9643b91e8f6789
SHA512

c2d2995622352b6ffee6671de8a92138164e6e4c8c3b4d9680289a41b680fc1e4ff56b26b5ddefc758ca6d8f35708d334f524318ccb5c91dfff4791be30ae098
SSDEEP

24576:sD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF49rOoBlZ:sp7E+QrFUBgq2f3Z

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	a7fab95ea927cb0689b8d40e1bb63790N.exe

Executes dropped EXE 2 IoCs

pid	Process
3236	sbietrcl.exe
2332	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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	a7fab95ea927cb0689b8d40e1bb63790N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3236 set thread context of 2332	3236	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	a7fab95ea927cb0689b8d40e1bb63790N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
3236	sbietrcl.exe
3236	sbietrcl.exe
3236	sbietrcl.exe
3236	sbietrcl.exe
3236	sbietrcl.exe
3236	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	a7fab95ea927cb0689b8d40e1bb63790N.exe
Token: SeDebugPrivilege	3236	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 3236	2688	a7fab95ea927cb0689b8d40e1bb63790N.exe	91
PID 2688 wrote to memory of 3236	2688	a7fab95ea927cb0689b8d40e1bb63790N.exe	91
PID 2688 wrote to memory of 3236	2688	a7fab95ea927cb0689b8d40e1bb63790N.exe	91
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92
PID 3236 wrote to memory of 2332	3236	sbietrcl.exe	92

C:\Users\Admin\AppData\Local\Temp\a7fab95ea927cb0689b8d40e1bb63790N.exe
"C:\Users\Admin\AppData\Local\Temp\a7fab95ea927cb0689b8d40e1bb63790N.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:2688
- 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:3236
- - 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:2332

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
2.2MB

MD5
2c83cc163effe030c729ba1d0f78a39e

SHA1
e23c5d9d475cbb1d2d43aa9b333676ca57be24f6

SHA256
b78c7b576f36f2ed5b7b7d98b95771d71794744ee39c70a944fa7da4d2c8d84c

SHA512
c50b8f688d0b9c6c44c756f3ded657dc61676cd77629ba25002eaf0be86455763cc3dfa62adde13f9c6d22b1ee7e4948734a241b2af96cc4186a51d77da1c338

Download Submit
memory/2332-37-0x0000000000520000-0x0000000000537000-memory.dmp

Filesize
92KB

Download
memory/2688-19-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/2688-5-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/2688-6-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/2688-18-0x0000000074622000-0x0000000074623000-memory.dmp

Filesize
4KB

Download
memory/2688-0-0x0000000074622000-0x0000000074623000-memory.dmp

Filesize
4KB

Download
memory/2688-2-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/2688-30-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/2688-1-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/3236-31-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/3236-32-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/3236-33-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/3236-34-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download
memory/3236-41-0x0000000074620000-0x0000000074BD1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads