remcos | 6881dcb378aba30c8938ecc12b44fd7907672acce6e80c8f82175418986baeea

General

Target

mkuvCQs6UPJDajm.exe
Size

356KB
MD5

e836215515acac87e44132f758b716d2
SHA1

633599eb2e5c3976734c15e11bff59825a55b0f3
SHA256

f3cb95abb8d4190c19cc2a1f9989b890100a321f69bbd6f7c639aaca680263e4
SHA512

c66bf0a837229c4c97ee818086e89dbed1046b01d442493bd756deebf38756a5656e386730c00cace13ace13c7ceb34e4df52e1b8f6e963d5a670c6d05d1d912
SSDEEP

6144:HvuMLvY5/FiuQLaHNwytAC9asRFCDewPNzf94Ev52Y6G3JV+OoB:HvuWhu2auytAOawFEJfsG3JV+Oo

Score

10^/10

remcos remotehost1111 discovery rat

Malware Config

Extracted

Family

remcos

Version

2.5.1 Pro

Botnet

RemoteHost1111

C2

newdnsremi.ddns.net:1111

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-60ZF3R
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2664	2256	mkuvCQs6UPJDajm.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 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	mkuvCQs6UPJDajm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2256	mkuvCQs6UPJDajm.exe
2256	mkuvCQs6UPJDajm.exe
2256	mkuvCQs6UPJDajm.exe
2256	mkuvCQs6UPJDajm.exe
2256	mkuvCQs6UPJDajm.exe
2256	mkuvCQs6UPJDajm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2256	mkuvCQs6UPJDajm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2664	mkuvCQs6UPJDajm.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2500	2256	mkuvCQs6UPJDajm.exe	30
PID 2256 wrote to memory of 2500	2256	mkuvCQs6UPJDajm.exe	30
PID 2256 wrote to memory of 2500	2256	mkuvCQs6UPJDajm.exe	30
PID 2256 wrote to memory of 2500	2256	mkuvCQs6UPJDajm.exe	30
PID 2256 wrote to memory of 2528	2256	mkuvCQs6UPJDajm.exe	32
PID 2256 wrote to memory of 2528	2256	mkuvCQs6UPJDajm.exe	32
PID 2256 wrote to memory of 2528	2256	mkuvCQs6UPJDajm.exe	32
PID 2256 wrote to memory of 2528	2256	mkuvCQs6UPJDajm.exe	32
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33
PID 2256 wrote to memory of 2664	2256	mkuvCQs6UPJDajm.exe	33

C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe
"C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\&startupname&" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB77D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2500
- C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe
  "{path}"
  2⤵
  PID:2528
- C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe
  "{path}"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:2664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB77D.tmp

Filesize
1KB

MD5
9d12f2b9a8717fa1ac89be7a15d8c3e1

SHA1
e1d3f1052f54f3b5a16dda1f59f282fdd7e1eea4

SHA256
844ff8b0ccd4c63b4c511ecf224b358f249aa557962de13d4947b16e009f776f

SHA512
e0a886d570a13b34bb88d0929e1011238779cba474953ba41da07516e8a969664f735564e5179116676e8d2ccba56697b7ff9b98458c170ddb35ff8d36505bd7

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
74B

MD5
0280fec956096e590a457a1e32a1d1c9

SHA1
72123e9fbd8488f120b9a516c4d265913d3bf73b

SHA256
dd4a2d76d79351bff0c426c7a463241b7e46eab3b0572232bc4121a422a7fce5

SHA512
82f9f67757d9571cda616c8d246d6f4b02742a26bc6c15474e83ebd5a73c490f3d215fde6b99c083cdafd151154b872324a4c362ca453f8d409198e75838b6e3

Download Submit
memory/2256-3-0x0000000073D50000-0x000000007443E000-memory.dmp

Filesize
6.9MB

Download
memory/2256-2-0x0000000000210000-0x0000000000218000-memory.dmp

Filesize
32KB

Download
memory/2256-1-0x0000000001130000-0x0000000001190000-memory.dmp

Filesize
384KB

Download
memory/2256-0-0x0000000073D5E000-0x0000000073D5F000-memory.dmp

Filesize
4KB

Download
memory/2256-4-0x0000000073D5E000-0x0000000073D5F000-memory.dmp

Filesize
4KB

Download
memory/2256-5-0x0000000073D50000-0x000000007443E000-memory.dmp

Filesize
6.9MB

Download
memory/2256-6-0x0000000000E80000-0x0000000000ECE000-memory.dmp

Filesize
312KB

Download
memory/2256-7-0x0000000000740000-0x0000000000770000-memory.dmp

Filesize
192KB

Download
memory/2256-27-0x0000000073D50000-0x000000007443E000-memory.dmp

Filesize
6.9MB

Download
memory/2664-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-12-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2664-15-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-16-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-13-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2664-11-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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