remcos | 5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3

General

Target

5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe
Size

134KB
MD5

936300f5be3926b1bc5f7c836c497d5e
SHA1

17e0fa9d06006b5247468716b9417f4cd91a6bb4
SHA256

5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3
SHA512

bb664c9d37e8615486e9aace662580a4c4a344cd0c6bcd1c88d349e749a1ea8260ea56d8f5ea09113aa0f3f81af8669a730a6c2d53ebed08f7680a148e6673ef
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXarMW:xP6/M+WLckOBhVmIqrMW

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
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
2124	wn2ra4ohzdr.exe
2680	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2524	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.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-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2124 set thread context of 2680	2124	wn2ra4ohzdr.exe	32

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	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.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
2680	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2124	2524	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe	31
PID 2524 wrote to memory of 2124	2524	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe	31
PID 2524 wrote to memory of 2124	2524	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe	31
PID 2524 wrote to memory of 2124	2524	5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe	31
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32
PID 2124 wrote to memory of 2680	2124	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe
"C:\Users\Admin\AppData\Local\Temp\5946317c0a7d30b7c3cda5d87f0f20e00704cafa5a42bd888a7a846dbfdb10a3.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2524
- 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:2124
- - 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:2680

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

System Information Discovery

1

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
134KB

MD5
b870885c1ee1c25601875bd5c8e66572

SHA1
e211d2d1d9639204de4580018a8815f61e7ea421

SHA256
30de0fb5553e6d4fbd06e44063de604b6e9bfcd80901f7de927d9e701ba53af9

SHA512
1b9c994a5a033eac5f80d127534f9ff61c4d4b2043cf7e3ff219a26525440c9aea63de48f70efd4c824d6cfd94cbbb49929a932fd9b55967a10d38fc02cd6b23

Download Submit
memory/2124-33-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2124-13-0x0000000000B00000-0x0000000000B28000-memory.dmp

Filesize
160KB

Download
memory/2124-14-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2124-15-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2124-34-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-1-0x0000000001240000-0x0000000001268000-memory.dmp

Filesize
160KB

Download
memory/2524-2-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-3-0x0000000000480000-0x00000000004A0000-memory.dmp

Filesize
128KB

Download
memory/2524-12-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-0-0x0000000074A2E000-0x0000000074A2F000-memory.dmp

Filesize
4KB

Download
memory/2680-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2680-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2680-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads