remcos | b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3

General

Target

b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe
Size

140KB
MD5

30f7acc51821a12ab4eb1cd9a0dcff94
SHA1

06d744b9f8982e4b36896f38f75463100f644bda
SHA256

b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3
SHA512

e601feee4fb460ce512ff232f397a003024fdd11c06ecd4181e48c70d1addb13bd969ddb19295aaed2883614bd3eb43546ffa516367eb522cdd2e4baf785c760
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVS7:xP6/M+WLckOBhVmIYI

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
2868	wn2ra4ohzdr.exe
2656	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
1700	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 2656	2868	wn2ra4ohzdr.exe	31

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	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.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
2656	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2868	1700	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe	30
PID 1700 wrote to memory of 2868	1700	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe	30
PID 1700 wrote to memory of 2868	1700	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe	30
PID 1700 wrote to memory of 2868	1700	b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe	30
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31
PID 2868 wrote to memory of 2656	2868	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe
"C:\Users\Admin\AppData\Local\Temp\b49d3ac4c38b436445299032a532e2f3de973e1662a12b526ea8aa074d5bbff3.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- 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:2868
- - 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:2656

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
140KB

MD5
84ca117057d5f8028fe181c58dd45251

SHA1
0649bf45a92b92de8121bca3df9bd5878ff04b42

SHA256
3d93eb4c18de528957377a7255607e7a52df802cd4b4c774bb83ecb780a3101b

SHA512
121ac597cb380185123ba33f1783a4c152bac578bdbc088b38463df3cdfe29e78c2f219729fd869ac6986a077dd907770f2841696ce20fe44ed49802817a8cd7

Download Submit
memory/1700-12-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/1700-1-0x0000000001080000-0x00000000010A8000-memory.dmp

Filesize
160KB

Download
memory/1700-2-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/1700-3-0x0000000000740000-0x0000000000760000-memory.dmp

Filesize
128KB

Download
memory/1700-0-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2656-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2656-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2656-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2868-15-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-13-0x00000000013B0000-0x00000000013D8000-memory.dmp

Filesize
160KB

Download
memory/2868-14-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-33-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-34-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads