remcos | 35afd6971fb23d04f2bf72d505cb4bcd956c7b97ba002495a071fb94686969e7

General

Target

new.exe
Size

1.4MB
MD5

9549b9ff42af2fdd1943a1cb5e41baff
SHA1

bf30c30071ea553e0bc2a01aa2ebad1d2cef8868
SHA256

f0890236561509ebdba4da6afbd92c6684a454c80edecba802f7e72cdfa6db6b
SHA512

1ce8671893d354b5ec340ef03ad5583216e1d1a6191442fd5368a353d2515810afdb5dee2f29801e018de6736c0667fee6ec1961e7af04b3e6ab66346c30aaca
SSDEEP

24576:KqDEvCTbMWu7rQYlBQcBiT6rprG8aLxnmUItiv3cXziE1ToL8X/6P:KTvC/MTQYxsWR7aLxnmUj/Oz72Av

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-EPD71P
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
Remcos family
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-1-5-21-805940606-1861219160-370298170-1000\Control Panel\International\Geo\Nation	chrome.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\chrome.vbs	chrome.exe

Executes dropped EXE 3 IoCs

pid	Process
2868	chrome.exe
2264	chrome.exe
2320	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-805940606-1861219160-370298170-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-EPD71P = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	chrome.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-EPD71P = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-805940606-1861219160-370298170-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-EPD71P = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-EPD71P = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000a000000023b40-14.dat	autoit_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 4 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	new.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrome.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chrome.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe

Suspicious use of FindShellTrayWindow 8 IoCs

pid	Process
1732	new.exe
1732	new.exe
2868	chrome.exe
2868	chrome.exe
2264	chrome.exe
2264	chrome.exe
2320	remcos.exe
2320	remcos.exe

Suspicious use of SendNotifyMessage 8 IoCs

pid	Process
1732	new.exe
1732	new.exe
2868	chrome.exe
2868	chrome.exe
2264	chrome.exe
2264	chrome.exe
2320	remcos.exe
2320	remcos.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2868	1732	new.exe	86
PID 1732 wrote to memory of 2868	1732	new.exe	86
PID 1732 wrote to memory of 2868	1732	new.exe	86
PID 2868 wrote to memory of 2264	2868	chrome.exe	88
PID 2868 wrote to memory of 2264	2868	chrome.exe	88
PID 2868 wrote to memory of 2264	2868	chrome.exe	88
PID 2264 wrote to memory of 2320	2264	chrome.exe	90
PID 2264 wrote to memory of 2320	2264	chrome.exe	90
PID 2264 wrote to memory of 2320	2264	chrome.exe	90

C:\Users\Admin\AppData\Local\Temp\new.exe
"C:\Users\Admin\AppData\Local\Temp\new.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Users\Admin\AppData\Local\directory\chrome.exe
  "C:\Users\Admin\AppData\Local\Temp\new.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2868
- - C:\Users\Admin\AppData\Local\directory\chrome.exe
    "C:\Users\Admin\AppData\Local\directory\chrome.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:2264
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of FindShellTrayWindow
      Suspicious use of SendNotifyMessage
      PID:2320

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\Local\Temp\Dalis

Filesize
192KB

MD5
c96f916d20dcaad773969db9d24bf1be

SHA1
efa4e89b4ea946555337a852c6c2c09ca0b21fa3

SHA256
3caedbcb0dfd951e4bc70df892291c3a0cc0c0f61e07a8fdca51c672eca07f5e

SHA512
0b6dfb1258ba8e62f0d11c9835b35cd9985f7a40f67c219572c48dfa40b0c8074051b068bc905827844cc20523cda9c8795e5890e032b0440a507e74abd04a1c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Dalis

Filesize
483KB

MD5
a34be9ea8580f708ad9968c443210cca

SHA1
8ccb6a23472c83acd9d70ffc2c50410fa838b119

SHA256
f58769047375e958921933cfb3763c0ab1e3171b577f1b4ed519685064997424

SHA512
22a7a24cc2fb62ce7ecccde2a110e77ef12b38da801d297f1cdaf2764d3529ce5175378d8debcf6fd468909578aab2b1cf5bc0f03fed57c484514f63d142a890

Download Submit
C:\Users\Admin\AppData\Local\Temp\Gehman

Filesize
84KB

MD5
c8d4b14b9e0ddee2c651317473410eae

SHA1
bb5205bfeca473a57894e8498c02897d619b7a83

SHA256
f4ee6ff1f55b128ad21a50d74ba2d29c4030439e5e1a0b6addb7a2aa32d675ce

SHA512
cbdeca79b15d75ae0860215bc3329ccd1ecd9587e58640160ce6c3329047f0a31258ceb1567111b69cf0df7e3c0fb7f41dee5c4fa337a2254cc1e122fee34125

Download Submit
C:\Users\Admin\AppData\Local\Temp\aut9A1D.tmp

Filesize
407KB

MD5
d2f208eaa0db50f7f4d58d343eb7f641

SHA1
dd1711fdc533ef8d597a4b9844323ccf0d83d5c2

SHA256
437d7d5c8bf860e33b1a6b93e139433f17d82f24ee1e89352ae4bcf571c267d1

SHA512
a640352082d69daee0ebe10e46432f77fcfd2a7accb3447e54c2eac2d7b6d36fe1f3b48af1deb5401abebc39a6a6b60a070f7a0f1ef06e9f4b2b7b71b3f4470e

Download Submit
C:\Users\Admin\AppData\Local\Temp\aut9A3D.tmp

Filesize
42KB

MD5
9759246f068c11cf1caa5f553b94dee2

SHA1
6556e0febfbf1b08c2b98f01cd4670baffa0f359

SHA256
2ea2e726d82609c1a28d5200c46a52c8fc9612496e4e4c71f09c658868962748

SHA512
cee5ee112d2c8b98b472388f147496ac4b0cbd3b71f7ad2532b84b78284f16459510511d8291511de766081654c91d62de794590930a2ef02caeae2860c2e045

Download Submit
C:\Users\Admin\AppData\Local\directory\chrome.exe

Filesize
1.4MB

MD5
9549b9ff42af2fdd1943a1cb5e41baff

SHA1
bf30c30071ea553e0bc2a01aa2ebad1d2cef8868

SHA256
f0890236561509ebdba4da6afbd92c6684a454c80edecba802f7e72cdfa6db6b

SHA512
1ce8671893d354b5ec340ef03ad5583216e1d1a6191442fd5368a353d2515810afdb5dee2f29801e018de6736c0667fee6ec1961e7af04b3e6ab66346c30aaca

Download Submit
memory/1732-11-0x0000000001540000-0x0000000001544000-memory.dmp

Filesize
16KB

Download
memory/2264-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2264-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2320-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads