remcos | d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82

General

Target

d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe
Size

140KB
MD5

1be47bc640984a6ef5a258f12c902de0
SHA1

f1c2872e67f39aabc821973ddfa0db335414a57b
SHA256

d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82
SHA512

8b4af1bb3d980d2d0cd456ebe56ad83137406e71d594fc2122cab4a37b2024a757b33ef88daeb5d54018bd08dc5d3bf1c6a32247f66c9917a72e2610c5db6677
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHys:xP6/M+WLckOBhVmI5s

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	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe

Executes dropped EXE 2 IoCs

pid	Process
4836	wn2ra4ohzdr.exe
1648	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"	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4836 set thread context of 1648	4836	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	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.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
1648	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 4836	4000	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe	86
PID 4000 wrote to memory of 4836	4000	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe	86
PID 4000 wrote to memory of 4836	4000	d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe	86
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90
PID 4836 wrote to memory of 1648	4836	wn2ra4ohzdr.exe	90

C:\Users\Admin\AppData\Local\Temp\d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe
"C:\Users\Admin\AppData\Local\Temp\d14a38d2c9b1e72793190664f295860f637ceaa4a4a0d3293d6432e0e0d13a82N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4000
- 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:4836
- - 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:1648

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
3d02da7bc3fa34838e99eee2edff6c53

SHA1
64b29c7638fd4e78f74f75f82d84cae6a351fd4a

SHA256
2f97ab84d96b5a8232d34db2ecbdaf18168a24b232e6214287f952b3b8e467b2

SHA512
6880e1bfaa886f4cd4a982da291de5850806b6f9fd3ed8a5a4517f594d42cc68e1c28e88374ae3c78ed6000b8b93b1b8e743d80b6aeccee447656c60cdc07bfc

Download Submit
memory/1648-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1648-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1648-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1648-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1648-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1648-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4000-5-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/4000-21-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4000-20-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/4000-6-0x0000000005A20000-0x0000000005A40000-memory.dmp

Filesize
128KB

Download
memory/4000-0-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/4000-4-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4000-3-0x00000000057D0000-0x0000000005862000-memory.dmp

Filesize
584KB

Download
memory/4000-2-0x0000000005E80000-0x0000000006424000-memory.dmp

Filesize
5.6MB

Download
memory/4000-1-0x0000000000DA0000-0x0000000000DC8000-memory.dmp

Filesize
160KB

Download
memory/4836-22-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-23-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-34-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-36-0x0000000075310000-0x0000000075AC0000-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