remcos | 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92

General

Target

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Size

703KB
MD5

cfeae297e7b47d957e9e275ede703064
SHA1

f31ea0ebf131e7186acf028687581318642eff74
SHA256

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92
SHA512

ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a
SSDEEP

12288:HpIgdWtnyVADTJUSx1VUDp5eHKCREbiALl4JFznCy:XdWtnyVAJvx1VUKkOMOJ1C

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

81.17.17.70:1198

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
windowsfiles.exe
copy_folder
windowsfiles
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
windowsfiles
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-NMB4R7
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

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 23 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2260-4-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2260-5-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2260-8-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2260-9-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2260-23-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-29-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-30-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-33-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-35-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-36-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-37-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-42-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-43-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-48-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-49-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-55-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-56-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-61-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-62-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-67-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-69-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-74-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/2280-75-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Detects executables packed with SmartAssembly 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4004-1-0x0000000000AC0000-0x0000000000B76000-memory.dmp	INDICATOR_EXE_Packed_SmartAssembly
C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe	INDICATOR_EXE_Packed_SmartAssembly

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

Processes:

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe

Executes dropped EXE 2 IoCs

Processes:

windowsfiles.exewindowsfiles.exe

pid process

4644 windowsfiles.exe
2280 windowsfiles.exe

pid	process
4644	windowsfiles.exe
2280	windowsfiles.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exewindowsfiles.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	windowsfiles.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	windowsfiles.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exewindowsfiles.exe

description	pid	process	target process
PID 4004 set thread context of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4644 set thread context of 2280	4644	windowsfiles.exe	windowsfiles.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsfiles.exe

pid process

2280 windowsfiles.exe

pid	process
2280	windowsfiles.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exewindowsfiles.exe

description	pid	process	target process
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 4004 wrote to memory of 2260	4004	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
PID 2260 wrote to memory of 4644	2260	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	windowsfiles.exe
PID 2260 wrote to memory of 4644	2260	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	windowsfiles.exe
PID 2260 wrote to memory of 4644	2260	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe
PID 4644 wrote to memory of 2280	4644	windowsfiles.exe	windowsfiles.exe

C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
"C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
  "C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2260
- - C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
    "C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4644
  - - C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
      "C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2280

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4140 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:2020

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\windowsfiles\logs.dat

Filesize
144B

MD5
74c971344b6f26101cc7e3e3f78eae66

SHA1
3dce0366bff1a0ca53325e7eb945cacc30fb6f18

SHA256
bb70661e44b521b39bae1d4dde4bfbcaeeeedbc8d68e5ef98afb49544eac7b33

SHA512
7d110ed852a5f41bca312f18c9842f9ad265f332311e3419dd5681fee95c1209832bd7946f05b1315eb963c3e6c215c93d39078972f1f9db88177c98ea5f800d

Download Submit
C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe

Filesize
703KB

MD5
cfeae297e7b47d957e9e275ede703064

SHA1
f31ea0ebf131e7186acf028687581318642eff74

SHA256
70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92

SHA512
ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a

Download Submit
memory/2260-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-4-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2280-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4004-1-0x0000000000AC0000-0x0000000000B76000-memory.dmp

Filesize
728KB

Download
memory/4004-7-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/4004-0-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/4004-2-0x0000000005BB0000-0x0000000006154000-memory.dmp

Filesize
5.6MB

Download
memory/4004-3-0x00000000055F0000-0x0000000005600000-memory.dmp

Filesize
64KB

Download
memory/4644-31-0x00000000736D0000-0x0000000073E80000-memory.dmp

Filesize
7.7MB

Download
memory/4644-24-0x00000000736D0000-0x0000000073E80000-memory.dmp

Filesize
7.7MB

Download
memory/4644-25-0x0000000004F60000-0x0000000004F70000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads