remcos | 91baa78314206a19bf1224b895488a6241b06f856e8d98113458c17842e78540

General

Target

fc640a0cb5f5f15da905fd63b6971fe0N.exe
Size

139KB
MD5

fc640a0cb5f5f15da905fd63b6971fe0
SHA1

a86aed0b14fa70106045cb6ead2ac55821ec86a9
SHA256

91baa78314206a19bf1224b895488a6241b06f856e8d98113458c17842e78540
SHA512

10e49658858aad38aef0479530096b855de50c67baa7db1c05e2c402a67d5b3af836319b3bdac1b325154e722943f3266aa620168c05f6e326f6fbe38d92c8a9
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKB:xPd4n/M+WLcilrpgGH/GwY87mVmIXx

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	fc640a0cb5f5f15da905fd63b6971fe0N.exe

Executes dropped EXE 2 IoCs

pid	Process
1924	wn2ra4ohzdr.exe
2716	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"	fc640a0cb5f5f15da905fd63b6971fe0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1924 set thread context of 2716	1924	wn2ra4ohzdr.exe	95

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	fc640a0cb5f5f15da905fd63b6971fe0N.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
2716	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 884 wrote to memory of 1924	884	fc640a0cb5f5f15da905fd63b6971fe0N.exe	92
PID 884 wrote to memory of 1924	884	fc640a0cb5f5f15da905fd63b6971fe0N.exe	92
PID 884 wrote to memory of 1924	884	fc640a0cb5f5f15da905fd63b6971fe0N.exe	92
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95
PID 1924 wrote to memory of 2716	1924	wn2ra4ohzdr.exe	95

C:\Users\Admin\AppData\Local\Temp\fc640a0cb5f5f15da905fd63b6971fe0N.exe
"C:\Users\Admin\AppData\Local\Temp\fc640a0cb5f5f15da905fd63b6971fe0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:884
- 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:1924
- - 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:2716

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
c018ab052260ee2fd5347d4131ec67b7

SHA1
b26ecd29a64e08103d21fe8c43263a31e348ed95

SHA256
b95275c6cbde38f11d4f7b94eed17b6e1f3b2759bdcb385f17bd55199f25a5c2

SHA512
8daa41e0e7aa2d280fb8b005f73702aab7d68cb4fafea6870f711a974bcba872b9517ec3a4349b32b3148e466be10533cddc8fb349fc497d870a1f8bcd6a902c

Download Submit
memory/884-0-0x00000000748BE000-0x00000000748BF000-memory.dmp

Filesize
4KB

Download
memory/884-1-0x0000000000B90000-0x0000000000BB8000-memory.dmp

Filesize
160KB

Download
memory/884-2-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download
memory/884-3-0x0000000005630000-0x00000000056C2000-memory.dmp

Filesize
584KB

Download
memory/884-4-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/884-5-0x00000000055C0000-0x00000000055CA000-memory.dmp

Filesize
40KB

Download
memory/884-6-0x0000000005B50000-0x0000000005B70000-memory.dmp

Filesize
128KB

Download
memory/884-22-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/884-20-0x00000000748BE000-0x00000000748BF000-memory.dmp

Filesize
4KB

Download
memory/1924-21-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/1924-23-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/1924-34-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/1924-36-0x00000000748B0000-0x0000000075060000-memory.dmp

Filesize
7.7MB

Download
memory/2716-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2716-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2716-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2716-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2716-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2716-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads