remcos | 79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289

General

Target

79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Size

1.1MB
MD5

f02ee994d7fe02a11c3314b135e2eb5e
SHA1

067d3c3349b64a5c9b6c6269df8a78624450cc03
SHA256

79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289
SHA512

d8ca0faa09ed9ce5210b0326df577d8ae2b94a1f135fd272c70b41b6ef14bd1cb0b01aad5e4b33e076e341eed7eda6ccec8e612297d1622f2a30c95b14a3e03b
SSDEEP

24576:eaTgKwZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0Fq:LTgdZOcuUL3xAx/8b2S7Z0I

Score

10^/10

remcos chinemerem discovery rat

Malware Config

Extracted

Family

remcos

Version

2.2.2 Pro

Botnet

chinemerem

C2

remcoss.onmypc.org:3765

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
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
r-8ET8H0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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
Remcos family
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-1-5-21-446031748-3036493239-2009529691-1000\Control Panel\International\Geo\Nation	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe

Executes dropped EXE 1 IoCs

pid	Process
3952	AboutSettingsHandlers.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/1348-16-0x0000000000CD0000-0x0000000000E59000-memory.dmp	autoit_exe
behavioral2/memory/1348-21-0x0000000000CD0000-0x0000000000E59000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1348 set thread context of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93

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 4 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	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AboutSettingsHandlers.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
4856	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4852	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93
PID 1348 wrote to memory of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93
PID 1348 wrote to memory of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93
PID 1348 wrote to memory of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93
PID 1348 wrote to memory of 4852	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	93
PID 1348 wrote to memory of 4856	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	97
PID 1348 wrote to memory of 4856	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	97
PID 1348 wrote to memory of 4856	1348	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	97

C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
"C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
  "C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4852
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4856

C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3952

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\Roaming\UIMgrBroker\AboutSettingsHandlers.exe

Filesize
1.1MB

MD5
7a52149ec70ed36b73a970e49cee50e5

SHA1
13350cbbc14386883f0dca083eb87f5691206f28

SHA256
cd2cf9270462833dd2daac85cbcbb121b613f9de4fb49c658f3d6cc6753a772f

SHA512
17b98fb019feacc0a4530db2b094e1d0d3126c378b731b911017fa533754c33fa15923d29f7ff4b9f57f6fe083809dce400daf811728a8040bccce4708820623

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

Filesize
79B

MD5
c4fc197ff47205c409d66c9c965e106f

SHA1
c7ba96de5536b28c93928ca16da142b5784befb8

SHA256
d5a7ac763be747944e2806a548d22cee556cc29378d82609e232a0a0a9acae72

SHA512
1fccdb2e8001f6a2ea92ca6a3ac4403868d69cdac178fe7c39f22a17024483a099be5e9f40cdc3fe245cb2ae0ce75d5a87641c093e53558e6ac41940286ce2d3

Download Submit
memory/1348-1-0x00000000016D0000-0x00000000016D3000-memory.dmp

Filesize
12KB

Download
memory/1348-2-0x0000000001850000-0x0000000001851000-memory.dmp

Filesize
4KB

Download
memory/1348-0-0x0000000000CD0000-0x0000000000E59000-memory.dmp

Filesize
1.5MB

Download
memory/1348-15-0x00000000016D0000-0x00000000016D3000-memory.dmp

Filesize
12KB

Download
memory/1348-16-0x0000000000CD0000-0x0000000000E59000-memory.dmp

Filesize
1.5MB

Download
memory/1348-21-0x0000000000CD0000-0x0000000000E59000-memory.dmp

Filesize
1.5MB

Download
memory/3952-29-0x00000000016D0000-0x00000000016D3000-memory.dmp

Filesize
12KB

Download
memory/3952-27-0x00000000001E0000-0x0000000000369000-memory.dmp

Filesize
1.5MB

Download
memory/4852-3-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4852-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4852-11-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4852-10-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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