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

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	mkuvCQs6UPJDajm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3964 set thread context of 3292	3964	mkuvCQs6UPJDajm.exe	99

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mkuvCQs6UPJDajm.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
468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3964	mkuvCQs6UPJDajm.exe
3964	mkuvCQs6UPJDajm.exe
3964	mkuvCQs6UPJDajm.exe
3964	mkuvCQs6UPJDajm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3964	mkuvCQs6UPJDajm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3292	mkuvCQs6UPJDajm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 468	3964	mkuvCQs6UPJDajm.exe	97
PID 3964 wrote to memory of 468	3964	mkuvCQs6UPJDajm.exe	97
PID 3964 wrote to memory of 468	3964	mkuvCQs6UPJDajm.exe	97
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99
PID 3964 wrote to memory of 3292	3964	mkuvCQs6UPJDajm.exe	99

C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe
"C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\&startupname&" /XML "C:\Users\Admin\AppData\Local\Temp\tmp22A6.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:468
- C:\Users\Admin\AppData\Local\Temp\mkuvCQs6UPJDajm.exe
  "{path}"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:3292

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

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\Local\Temp\tmp22A6.tmp

Filesize
1KB

MD5
2b777f15079c8ccadcd21c137a596630

SHA1
b9a652046fbc165dd6fcbb4f68c7c41026b597c6

SHA256
2b272590aaf7219f545df74853156d200226435e9c5ea4067de678dc0224b1ec

SHA512
6c72a49b0d5e48e15e6b13877257c5d96cba78d845b94cb52016d8b8fa29281fd28bb5105963a7417076decd73dd8d23025912dd2f99aae9fd54575a5b368f90

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

Filesize
74B

MD5
a43abcf756c9ba5a6aca21ad81030102

SHA1
f42b8d6a52ceeddc55bcd2318e2dcf11b8c4a9f5

SHA256
f7e402198866964532ab846d7433ae3412e251ecb0ed86df1a75a5ca44da4808

SHA512
2bbcb88a9b0b798b7869234ac574d84898891021582f462acf90bb1f6dd3fd2d0f22ba644920056f990e7ced4f7c13bb1a5beafc7df281cc126a3b7c60b0997f

Download Submit
memory/3292-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3292-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3292-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3292-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3292-18-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3292-15-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3964-5-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/3964-9-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/3964-10-0x0000000007B20000-0x0000000007B6E000-memory.dmp

Filesize
312KB

Download
memory/3964-11-0x00000000063A0000-0x00000000063D0000-memory.dmp

Filesize
192KB

Download
memory/3964-8-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/3964-7-0x0000000004B90000-0x0000000004B98000-memory.dmp

Filesize
32KB

Download
memory/3964-6-0x0000000007940000-0x00000000079DC000-memory.dmp

Filesize
624KB

Download
memory/3964-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/3964-4-0x0000000004BA0000-0x0000000004BAA000-memory.dmp

Filesize
40KB

Download
memory/3964-3-0x0000000007690000-0x0000000007722000-memory.dmp

Filesize
584KB

Download
memory/3964-24-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/3964-2-0x0000000007BA0000-0x0000000008144000-memory.dmp

Filesize
5.6MB

Download
memory/3964-1-0x0000000000760000-0x00000000007C0000-memory.dmp

Filesize
384KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads