remcos | b9fdce90b71b584cc85d90027dc206949a6d92cf92159112e2f96f5578fc78b7

General

Target

CIF0983745DOC.exe
Size

955KB
MD5

52c642cdb7298bb11558da681d352978
SHA1

5ffacf37fb2e05b0c7078f89554e949afd369318
SHA256

b9fdce90b71b584cc85d90027dc206949a6d92cf92159112e2f96f5578fc78b7
SHA512

daf8b97540c58b58a86a2e73fc907ced0ba332d19811047491d59ae40ce53dc9ed613773b107da5fb8d96b59c1247a18b35eb5fbe4c8be2b016f65a80594f7d0
SSDEEP

24576:0IeeIW8rjYO/CjNIvTc4ST4AWptCaWaZldbmi+3I:0BeBLhIvwHkB7CfaNdc

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

ddpo.duckdns.org:59033

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-NUED7N
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2704	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1748 set thread context of 2716	1748	CIF0983745DOC.exe	33

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 3 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	CIF0983745DOC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CIF0983745DOC.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1748	CIF0983745DOC.exe
1748	CIF0983745DOC.exe
2704	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	CIF0983745DOC.exe
Token: SeDebugPrivilege	2704	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 2704	1748	CIF0983745DOC.exe	30
PID 1748 wrote to memory of 2704	1748	CIF0983745DOC.exe	30
PID 1748 wrote to memory of 2704	1748	CIF0983745DOC.exe	30
PID 1748 wrote to memory of 2704	1748	CIF0983745DOC.exe	30
PID 1748 wrote to memory of 372	1748	CIF0983745DOC.exe	32
PID 1748 wrote to memory of 372	1748	CIF0983745DOC.exe	32
PID 1748 wrote to memory of 372	1748	CIF0983745DOC.exe	32
PID 1748 wrote to memory of 372	1748	CIF0983745DOC.exe	32
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33
PID 1748 wrote to memory of 2716	1748	CIF0983745DOC.exe	33

C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe
"C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2704
- C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe
  "C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe"
  2⤵
  PID:372
- C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe
  "C:\Users\Admin\AppData\Local\Temp\CIF0983745DOC.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1748-0-0x0000000074C4E000-0x0000000074C4F000-memory.dmp

Filesize
4KB

Download
memory/1748-1-0x0000000000140000-0x0000000000234000-memory.dmp

Filesize
976KB

Download
memory/1748-2-0x0000000074C40000-0x000000007532E000-memory.dmp

Filesize
6.9MB

Download
memory/1748-3-0x0000000000560000-0x0000000000578000-memory.dmp

Filesize
96KB

Download
memory/1748-4-0x0000000074C4E000-0x0000000074C4F000-memory.dmp

Filesize
4KB

Download
memory/1748-5-0x0000000074C40000-0x000000007532E000-memory.dmp

Filesize
6.9MB

Download
memory/1748-6-0x0000000004980000-0x0000000004A44000-memory.dmp

Filesize
784KB

Download
memory/1748-20-0x0000000074C40000-0x000000007532E000-memory.dmp

Filesize
6.9MB

Download
memory/2716-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2716-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-10-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-8-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2716-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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