remcos | 5c37e543b3bfb45099e6733fd8fd93f7089cb8d058360181e72130bb1ec1ac68

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
08-03-2023 10:30

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General

Target

d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Size

1.2MB
MD5

9fe11f84460abd22cc955530ca89cf8c
SHA1

dac857c046614f4ebb015faac209d5c24bc39a3c
SHA256

d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c
SHA512

dca05d1a79bba70b863730b32a6d10715efefaab8832351013a2c42a49ad2b33e9006c0f761a141c6a701088042d4c1d9c23cd41a5f12e68dd1ebdd8a1795d95
SSDEEP

24576:v1Qwe3cOQaNZ0AyQVdySyswtL3A9ghr9ZdxkmGIfZLV6sjM4:vBchynSwh36gdFpwsj

Score

10^/10

remcos mekino-remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Mekino-RemoteHost

nadiac7806.hopto.org:2397

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
los.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-XBQXEL
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
trn
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 2 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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
5116	los.exe
4448	los.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	los.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	los.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4192 set thread context of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 5116 set thread context of 4448	5116	los.exe	100

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4448	los.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 4192 wrote to memory of 1768	4192	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	86
PID 1768 wrote to memory of 1080	1768	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	87
PID 1768 wrote to memory of 1080	1768	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	87
PID 1768 wrote to memory of 1080	1768	d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe	87
PID 1080 wrote to memory of 4176	1080	WScript.exe	88
PID 1080 wrote to memory of 4176	1080	WScript.exe	88
PID 1080 wrote to memory of 4176	1080	WScript.exe	88
PID 4176 wrote to memory of 5116	4176	cmd.exe	90
PID 4176 wrote to memory of 5116	4176	cmd.exe	90
PID 4176 wrote to memory of 5116	4176	cmd.exe	90
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100
PID 5116 wrote to memory of 4448	5116	los.exe	100

C:\Users\Admin\AppData\Local\Temp\d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
"C:\Users\Admin\AppData\Local\Temp\d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Users\Admin\AppData\Local\Temp\d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe
  "C:\Users\Admin\AppData\Local\Temp\d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\wtxyt.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:1080
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\los.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4176
    - - C:\Users\Admin\AppData\Roaming\los.exe
        
        C:\Users\Admin\AppData\Roaming\los.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:5116
      - C:\Users\Admin\AppData\Roaming\los.exe
        
        "C:\Users\Admin\AppData\Roaming\los.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:4448

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\wtxyt.vbs

Filesize
398B

MD5
cf758ec06c989323030d19d47fc4dd16

SHA1
3e9f66e79d7c8964e0446f76b163198384bebb24

SHA256
65c976c1e229ea7bc352c40862a0b71208b0b6bbe94a74d2ecb14b1fb70fcd3f

SHA512
7d4e37e7e8d73a554fff47cf1557cc6c89e816b567fac40019805ac67b11db6f2f635134a30f7dbac11b9733af2caec9e2137fa1e03d588e3adea64adbfa09ea

Download Submit
C:\Users\Admin\AppData\Roaming\los.exe

Filesize
1.2MB

MD5
9fe11f84460abd22cc955530ca89cf8c

SHA1
dac857c046614f4ebb015faac209d5c24bc39a3c

SHA256
d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c

SHA512
dca05d1a79bba70b863730b32a6d10715efefaab8832351013a2c42a49ad2b33e9006c0f761a141c6a701088042d4c1d9c23cd41a5f12e68dd1ebdd8a1795d95

Download Submit
C:\Users\Admin\AppData\Roaming\los.exe

Filesize
1.2MB

MD5
9fe11f84460abd22cc955530ca89cf8c

SHA1
dac857c046614f4ebb015faac209d5c24bc39a3c

SHA256
d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c

SHA512
dca05d1a79bba70b863730b32a6d10715efefaab8832351013a2c42a49ad2b33e9006c0f761a141c6a701088042d4c1d9c23cd41a5f12e68dd1ebdd8a1795d95

Download Submit
C:\Users\Admin\AppData\Roaming\los.exe

Filesize
1.2MB

MD5
9fe11f84460abd22cc955530ca89cf8c

SHA1
dac857c046614f4ebb015faac209d5c24bc39a3c

SHA256
d413604ffcd2897d729fd0079881b7b4a0dbd3d9d5869a97d7ec76713a12739c

SHA512
dca05d1a79bba70b863730b32a6d10715efefaab8832351013a2c42a49ad2b33e9006c0f761a141c6a701088042d4c1d9c23cd41a5f12e68dd1ebdd8a1795d95

Download Submit
memory/1768-141-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1768-140-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1768-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1768-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1768-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4192-138-0x0000000005410000-0x00000000054AC000-memory.dmp

Filesize
624KB

Download
memory/4192-139-0x0000000005270000-0x0000000005280000-memory.dmp

Filesize
64KB

Download
memory/4192-137-0x00000000051D0000-0x00000000051DA000-memory.dmp

Filesize
40KB

Download
memory/4192-136-0x0000000005270000-0x0000000005280000-memory.dmp

Filesize
64KB

Download
memory/4192-135-0x0000000005110000-0x00000000051A2000-memory.dmp

Filesize
584KB

Download
memory/4192-134-0x00000000055D0000-0x0000000005B74000-memory.dmp

Filesize
5.6MB

Download
memory/4192-133-0x0000000000630000-0x0000000000766000-memory.dmp

Filesize
1.2MB

Download
memory/4448-166-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-165-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-158-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-160-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-161-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-163-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-164-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-177-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-176-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-167-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-168-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-173-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-174-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4448-175-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/5116-154-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download
memory/5116-155-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download