remcos | a4492d82003f71168f2f2edfde20e2c1cf99f9cf79e1bf312bf61116885ea8eb

General

Target

9d68e0e0f47a3dc3089bb21dc6f81010N.exe
Size

139KB
MD5

9d68e0e0f47a3dc3089bb21dc6f81010
SHA1

a94358bec9b7536977f6899f5b4fb9b34d00efe1
SHA256

a4492d82003f71168f2f2edfde20e2c1cf99f9cf79e1bf312bf61116885ea8eb
SHA512

4dc146107d7aa49c0ad68d3b5332acbb78c694401874ad9fd09cff88457cfe5667d59ff234d3b04b800576f7aa0e41fe92eba9aa6d6f9eb44b3005a9f5a05c6e
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHR:xP6/M+WLckOBhVmIc

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

Executes dropped EXE 2 IoCs

pid	Process
2256	wn2ra4ohzdr.exe
2912	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2536	9d68e0e0f47a3dc3089bb21dc6f81010N.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-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	9d68e0e0f47a3dc3089bb21dc6f81010N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2912	2256	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	9d68e0e0f47a3dc3089bb21dc6f81010N.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
2912	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2256	2536	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	31
PID 2536 wrote to memory of 2256	2536	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	31
PID 2536 wrote to memory of 2256	2536	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	31
PID 2536 wrote to memory of 2256	2536	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	31
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32
PID 2256 wrote to memory of 2912	2256	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\9d68e0e0f47a3dc3089bb21dc6f81010N.exe
"C:\Users\Admin\AppData\Local\Temp\9d68e0e0f47a3dc3089bb21dc6f81010N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- 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:2256
- - 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:2912

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

\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
139KB

MD5
d0a36b557a4154648b852f442abcdf55

SHA1
b086b2718a7525a339a12617108b9eefbcbc6ea3

SHA256
675f1cde972c0416661f4f9436547b626053711b228038f42709b8a52422cbbf

SHA512
fe4311ea49cb513b0804bbe1e15d9a7317bde3d541bdf09d8948e5a0663dd57de02699d1a5e3970295e6e64b4ba1ef56a9734900a88ddf22e20eb739e9670bc1

Download Submit
memory/2256-35-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-13-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-14-0x0000000001250000-0x0000000001278000-memory.dmp

Filesize
160KB

Download
memory/2256-16-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-36-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2536-1-0x0000000000D40000-0x0000000000D68000-memory.dmp

Filesize
160KB

Download
memory/2536-2-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2536-3-0x0000000000770000-0x0000000000790000-memory.dmp

Filesize
128KB

Download
memory/2536-12-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2536-15-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2536-0-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2912-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2912-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads