remcos | cc96865b5c3ab2e628febe0eb6799cd4677664f2e6c0b8436fcb85212d9d6164

General

Target

18854368a0ff1912b80b96b2b944b8c0N.exe
Size

138KB
MD5

18854368a0ff1912b80b96b2b944b8c0
SHA1

fc74e14346d4552ce51ac4eb6b9ef697d648036a
SHA256

cc96865b5c3ab2e628febe0eb6799cd4677664f2e6c0b8436fcb85212d9d6164
SHA512

09a46266e08fb2696ab13747d2ed4b09d938f288285010bed66d80eac31c031543a5174ed541339df22b912779bccb488a94d558d6c8e844367c95f68d8d2e27
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK8:xPd4n/M+WLcilrpgGH/GwY87mVmIXs

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	18854368a0ff1912b80b96b2b944b8c0N.exe

Executes dropped EXE 2 IoCs

pid	Process
5076	wn2ra4ohzdr.exe
3196	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"	18854368a0ff1912b80b96b2b944b8c0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5076 set thread context of 3196	5076	wn2ra4ohzdr.exe	88

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	18854368a0ff1912b80b96b2b944b8c0N.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
3196	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 5076	4876	18854368a0ff1912b80b96b2b944b8c0N.exe	87
PID 4876 wrote to memory of 5076	4876	18854368a0ff1912b80b96b2b944b8c0N.exe	87
PID 4876 wrote to memory of 5076	4876	18854368a0ff1912b80b96b2b944b8c0N.exe	87
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88
PID 5076 wrote to memory of 3196	5076	wn2ra4ohzdr.exe	88

C:\Users\Admin\AppData\Local\Temp\18854368a0ff1912b80b96b2b944b8c0N.exe
"C:\Users\Admin\AppData\Local\Temp\18854368a0ff1912b80b96b2b944b8c0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4876
- 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:5076
- - 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:3196

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
4bfb757e658af81364fcf1232cb67ab7

SHA1
3b742a4c7864f0aae33403997b5077612b602ff2

SHA256
e1ad6dc3160a43849a635419bac871e31ef770e2e10ff4c4beb35600cf851d3d

SHA512
986bd7fa790c9e702ffacfb5661c20879c675ad49ab4a59d0f6c927ab55574b4978aceaead924ea26cbd74d2180b04c99457e8b2832e2f6189a3111771f81a3f

Download Submit
memory/3196-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3196-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3196-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3196-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3196-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3196-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4876-4-0x0000000004D80000-0x0000000004D8A000-memory.dmp

Filesize
40KB

Download
memory/4876-20-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/4876-6-0x0000000004E80000-0x0000000004EA0000-memory.dmp

Filesize
128KB

Download
memory/4876-5-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/4876-0-0x000000007466E000-0x000000007466F000-memory.dmp

Filesize
4KB

Download
memory/4876-3-0x0000000004BE0000-0x0000000004C72000-memory.dmp

Filesize
584KB

Download
memory/4876-2-0x0000000005190000-0x0000000005734000-memory.dmp

Filesize
5.6MB

Download
memory/4876-1-0x00000000001B0000-0x00000000001D8000-memory.dmp

Filesize
160KB

Download
memory/5076-21-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/5076-22-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/5076-33-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/5076-35-0x0000000074660000-0x0000000074E10000-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