remcos | 3f0143cb0fdd7f85c55841a713bf4934df3c7f17d1133103b323a5332535852b

General

Target

documents-pdf.exe
Size

446KB
MD5

12d7e4dbcb67711b60c8f626d81c7438
SHA1

4610fe694c6c796ed9ab5cc729519fe3c1fa7629
SHA256

3f0143cb0fdd7f85c55841a713bf4934df3c7f17d1133103b323a5332535852b
SHA512

ded570f6814aeb37d2af53362063aecc11d5a3dfc27fb5b26d082768768d810004b908c3ad27db6d05a347d8497ea950dc8a5fb216a544c353b5566f287f0f58
SSDEEP

6144:12LmXK3chajunEb8/kMb3nB74AogKjLMQx4kxY09AYx+wZzMgI11A1WMCc:126pFnEYRb3nBkAgCkxbAYXb

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

198.23.227.212:32583

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
yava_explore.exe
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-AYRCHN
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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 1 IoCs

pid	Process
2992	yava_explore.exe

Loads dropped DLL 2 IoCs

pid	Process
2328	documents-pdf.exe
2328	documents-pdf.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-AYRCHN = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava_explore.exe\""	documents-pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-AYRCHN = "\"C:\\Users\\Admin\\AppData\\Roaming\\yava_explore.exe\""	yava_explore.exe

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 2 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	yava_explore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	documents-pdf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 2992	2328	documents-pdf.exe	29
PID 2328 wrote to memory of 2992	2328	documents-pdf.exe	29
PID 2328 wrote to memory of 2992	2328	documents-pdf.exe	29
PID 2328 wrote to memory of 2992	2328	documents-pdf.exe	29

C:\Users\Admin\AppData\Local\Temp\documents-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\documents-pdf.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Users\Admin\AppData\Roaming\yava_explore.exe
  "C:\Users\Admin\AppData\Roaming\yava_explore.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:2992

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

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Roaming\yava_explore.exe

Filesize
446KB

MD5
12d7e4dbcb67711b60c8f626d81c7438

SHA1
4610fe694c6c796ed9ab5cc729519fe3c1fa7629

SHA256
3f0143cb0fdd7f85c55841a713bf4934df3c7f17d1133103b323a5332535852b

SHA512
ded570f6814aeb37d2af53362063aecc11d5a3dfc27fb5b26d082768768d810004b908c3ad27db6d05a347d8497ea950dc8a5fb216a544c353b5566f287f0f58

Download Submit
memory/2328-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

Filesize
1024KB

Download
memory/2328-2-0x00000000002E0000-0x000000000035A000-memory.dmp

Filesize
488KB

Download
memory/2328-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2328-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2328-14-0x00000000002E0000-0x000000000035A000-memory.dmp

Filesize
488KB

Download
memory/2328-13-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-23-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-27-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-19-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-21-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-22-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-17-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-24-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-25-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-26-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-18-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-28-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-29-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-30-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-31-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-32-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-33-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-34-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-35-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-36-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download
memory/2992-37-0x0000000000400000-0x000000000056A000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads