remcos | 73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3

General

Target

73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe
Size

139KB
MD5

64e3b91e8bead6f24e9b82ddc03e5fd0
SHA1

4ebde9a4ff2e48a118d5e3e75b8901422ea85567
SHA256

73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3
SHA512

0888718dc2c303d2f91a92231759895a823e2427ca902bbd47738ce303f55a6c60f7b00181ca0c690e74cd4f022dff1e6534b6bcfba249d2d4ec68a4ebe79864
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK8:xPd4n/M+WLcilrpgGH/GwY87mVmIXLg

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe

Executes dropped EXE 2 IoCs

pid	Process
5092	wn2ra4ohzdr.exe
316	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-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5092 set thread context of 316	5092	wn2ra4ohzdr.exe	90

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	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.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
316	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4104 wrote to memory of 5092	4104	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe	87
PID 4104 wrote to memory of 5092	4104	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe	87
PID 4104 wrote to memory of 5092	4104	73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe	87
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90
PID 5092 wrote to memory of 316	5092	wn2ra4ohzdr.exe	90

C:\Users\Admin\AppData\Local\Temp\73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe
"C:\Users\Admin\AppData\Local\Temp\73fd45821fd876a3ed29440f33a1010dfafac77a784e188a6ae5f4eb6b93f5e3N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4104
- 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:5092
- - 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:316

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
139KB

MD5
441be7fef83b69eb4ad06d116dbed90a

SHA1
d243f4213fe8f2beef051287ed032fe9d23e72c7

SHA256
4a2d05e5b3199b3720b04ff3454e0a987280e079d79b06a832dcba0f96ae24a2

SHA512
b1d4fcaa5da3d0c05fd81048948f8ea07aba68f46d474dd11858a788c049105f8b2720772c954f72e31b06e5e7f8b322574c07e62fe5378f7c1fc8bfda7d85bb

Download Submit
memory/316-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/316-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/316-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/316-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/316-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/316-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4104-5-0x0000000005AF0000-0x0000000005AFA000-memory.dmp

Filesize
40KB

Download
memory/4104-20-0x0000000074E4E000-0x0000000074E4F000-memory.dmp

Filesize
4KB

Download
memory/4104-22-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download
memory/4104-6-0x0000000005DE0000-0x0000000005E00000-memory.dmp

Filesize
128KB

Download
memory/4104-0-0x0000000074E4E000-0x0000000074E4F000-memory.dmp

Filesize
4KB

Download
memory/4104-4-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download
memory/4104-3-0x0000000005940000-0x00000000059D2000-memory.dmp

Filesize
584KB

Download
memory/4104-2-0x0000000005E50000-0x00000000063F4000-memory.dmp

Filesize
5.6MB

Download
memory/4104-1-0x0000000000F30000-0x0000000000F58000-memory.dmp

Filesize
160KB

Download
memory/5092-21-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download
memory/5092-23-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download
memory/5092-34-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download
memory/5092-36-0x0000000074E40000-0x00000000755F0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads