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

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	9d68e0e0f47a3dc3089bb21dc6f81010N.exe

Executes dropped EXE 2 IoCs

pid	Process
4172	wn2ra4ohzdr.exe
436	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-1-5-21-2718105630-359604950-2820636825-1000\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 4172 set thread context of 436	4172	wn2ra4ohzdr.exe	93

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
436	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 4172	1008	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	87
PID 1008 wrote to memory of 4172	1008	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	87
PID 1008 wrote to memory of 4172	1008	9d68e0e0f47a3dc3089bb21dc6f81010N.exe	87
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93
PID 4172 wrote to memory of 436	4172	wn2ra4ohzdr.exe	93

C:\Users\Admin\AppData\Local\Temp\9d68e0e0f47a3dc3089bb21dc6f81010N.exe
"C:\Users\Admin\AppData\Local\Temp\9d68e0e0f47a3dc3089bb21dc6f81010N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1008
- 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:4172
- - 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:436

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
dde44eeab407628c3a049d01c04c629c

SHA1
648488c31d60fc796657bf59d51b856c693b8b7f

SHA256
9384b4abde65b8046f536ff6285d0370e527edf26eb875e48605d8004fb4adf9

SHA512
b0d91567491dec0532315d0d104f8117dc1b79411ed44a74d4b8892ed525e08eda24d9ff686f65f85b5aae7b18b0cf36fa90be5f18c0b7c4633ffe33298cea5f

Download Submit
memory/436-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/436-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/436-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/436-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/436-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/436-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1008-5-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/1008-20-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/1008-22-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/1008-6-0x0000000005090000-0x00000000050B0000-memory.dmp

Filesize
128KB

Download
memory/1008-0-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/1008-4-0x0000000004F10000-0x0000000004F1A000-memory.dmp

Filesize
40KB

Download
memory/1008-3-0x0000000004F30000-0x0000000004FC2000-memory.dmp

Filesize
584KB

Download
memory/1008-2-0x0000000005440000-0x00000000059E4000-memory.dmp

Filesize
5.6MB

Download
memory/1008-1-0x00000000004F0000-0x0000000000518000-memory.dmp

Filesize
160KB

Download
memory/4172-21-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/4172-23-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/4172-34-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/4172-36-0x0000000074510000-0x0000000074CC0000-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