remcos | fe9ee73d343abbc300c6217f231f14bdd9d772590c4738ff633d863bb5d55fc3

General

Target

425b34ebc80eb9b7737738032b144650N.exe
Size

138KB
MD5

425b34ebc80eb9b7737738032b144650
SHA1

4fed566bab7378b35ef57512af545da3f6949fda
SHA256

fe9ee73d343abbc300c6217f231f14bdd9d772590c4738ff633d863bb5d55fc3
SHA512

fbfec8bb290087a2b0ffeedcc19b451fc74f8a7501a5084e761ab1d7d362187fa59e7605024305bbbda511534fa4b7ad0f908c407cacfbaacf343187a12363ab
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHh:xP6/M+WLckOBhVmIM

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
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 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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	425b34ebc80eb9b7737738032b144650N.exe

Executes dropped EXE 2 IoCs

pid	Process
2644	wn2ra4ohzdr.exe
4968	wn2ra4ohzdr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	425b34ebc80eb9b7737738032b144650N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2644 set thread context of 4968	2644	wn2ra4ohzdr.exe	87

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	425b34ebc80eb9b7737738032b144650N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4968	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 2644	1356	425b34ebc80eb9b7737738032b144650N.exe	86
PID 1356 wrote to memory of 2644	1356	425b34ebc80eb9b7737738032b144650N.exe	86
PID 1356 wrote to memory of 2644	1356	425b34ebc80eb9b7737738032b144650N.exe	86
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87
PID 2644 wrote to memory of 4968	2644	wn2ra4ohzdr.exe	87

C:\Users\Admin\AppData\Local\Temp\425b34ebc80eb9b7737738032b144650N.exe
"C:\Users\Admin\AppData\Local\Temp\425b34ebc80eb9b7737738032b144650N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1356
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2644
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
138KB

MD5
5d6c05ca9b429523abb14883dab76f18

SHA1
3c07a94686b83ccebd869a8eea87f59a57687847

SHA256
27e58fa7919d2b8538a1dbf4dd0a525579ae8dcec53e0b204bd857d0fb262023

SHA512
c9a6883023af98633d14b693d7be24004314e435a1c63297d8123edb48716e6e9508af26f3982514a98c2ac9424fadb7ddcf0dc339b398b05975bc2278bb0cfa

Download Submit
memory/1356-20-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/1356-4-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/1356-0-0x0000000074EEE000-0x0000000074EEF000-memory.dmp

Filesize
4KB

Download
memory/1356-5-0x0000000005230000-0x000000000523A000-memory.dmp

Filesize
40KB

Download
memory/1356-2-0x0000000005740000-0x0000000005CE4000-memory.dmp

Filesize
5.6MB

Download
memory/1356-6-0x0000000005440000-0x0000000005460000-memory.dmp

Filesize
128KB

Download
memory/1356-1-0x0000000000760000-0x0000000000788000-memory.dmp

Filesize
160KB

Download
memory/1356-3-0x0000000005190000-0x0000000005222000-memory.dmp

Filesize
584KB

Download
memory/2644-22-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/2644-21-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/2644-34-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4968-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads