remcos | 174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878

General

Target

174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe
Size

139KB
MD5

77c7bc93cb86b97f26471b06d7668654
SHA1

8e20bf557703b30a4e4a23eda7db6393252a7252
SHA256

174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878
SHA512

190b4bb4c4a10de1806fb66a4510f9bddabef7f3d58b300f14318625014078308f0b01b0654ad0baa31adf740a00b28b856a2138735f93451e1c70bb85bb7c7f
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHc:xP6/M+WLckOBhVmIV

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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe

Executes dropped EXE 2 IoCs

pid	Process
3924	wn2ra4ohzdr.exe
2204	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-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3924 set thread context of 2204	3924	wn2ra4ohzdr.exe	96

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	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.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
2204	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 3924	1612	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe	93
PID 1612 wrote to memory of 3924	1612	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe	93
PID 1612 wrote to memory of 3924	1612	174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe	93
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96
PID 3924 wrote to memory of 2204	3924	wn2ra4ohzdr.exe	96

C:\Users\Admin\AppData\Local\Temp\174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe
"C:\Users\Admin\AppData\Local\Temp\174d275e7cd95e50878e934ad3e7684dbbcc3ef7be79b6ba537bc3e99fdb0878.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1612
- 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:3924
- - 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:2204

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
140KB

MD5
c0a093eef221649404b91e028ae0b168

SHA1
60c2463791d608dc4e304dba1c87a480dd5fa9a6

SHA256
0b0238cc9b2cd487d1f474214034cabebca146879b377ab3936c750bbd1d0f7d

SHA512
64c4a1c6f66507ce0a81a3c03005706ee379c919db79c4f29d1a6e222a6e608b281824e69fe6afd9007bbd7e8873bd2efb7eb2ba36d3ce71ad886ff986193eb5

Download Submit
memory/1612-20-0x0000000074470000-0x0000000074C20000-memory.dmp

Filesize
7.7MB

Download
memory/1612-3-0x0000000004B10000-0x0000000004BA2000-memory.dmp

Filesize
584KB

Download
memory/1612-4-0x0000000004AD0000-0x0000000004ADA000-memory.dmp

Filesize
40KB

Download
memory/1612-2-0x0000000005020000-0x00000000055C4000-memory.dmp

Filesize
5.6MB

Download
memory/1612-5-0x0000000074470000-0x0000000074C20000-memory.dmp

Filesize
7.7MB

Download
memory/1612-6-0x0000000004C40000-0x0000000004C60000-memory.dmp

Filesize
128KB

Download
memory/1612-1-0x00000000000B0000-0x00000000000D8000-memory.dmp

Filesize
160KB

Download
memory/1612-0-0x000000007447E000-0x000000007447F000-memory.dmp

Filesize
4KB

Download
memory/2204-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2204-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2204-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2204-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2204-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2204-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3924-35-0x0000000074470000-0x0000000074C20000-memory.dmp

Filesize
7.7MB

Download
memory/3924-22-0x0000000074470000-0x0000000074C20000-memory.dmp

Filesize
7.7MB

Download
memory/3924-33-0x0000000074470000-0x0000000074C20000-memory.dmp

Filesize
7.7MB

Download
memory/3924-21-0x0000000074470000-0x0000000074C20000-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