remcos | 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
08/04/2024, 12:19

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General

Target
70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Size 703KB
Sample240408-phl2dacc4x
SHA256 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92
MD5 cfeae297e7b47d957e9e275ede703064
SHA1 f31ea0ebf131e7186acf028687581318642eff74
SHA512 ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a
SSDEEP 12288:HpIgdWtnyVADTJUSx1VUDp5eHKCREbiALl4JFznCy:XdWtnyVAJvx1VUKkOMOJ1C
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

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

Executes dropped EXE 2 IoCs

pid	Process
1172	windowsfiles.exe
1176	windowsfiles.exe

Loads dropped DLL 2 IoCs

pid	Process
3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
1172	windowsfiles.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-1-5-21-2610426812-2871295383-373749122-1000\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-1-5-21-2610426812-2871295383-373749122-1000\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

description	pid	Process	procid_target
PID 3036 set thread context of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 1172 set thread context of 1176	1172	windowsfiles.exe	30

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

pid	Process
1176	windowsfiles.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3036 wrote to memory of 3020	3036	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	28
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 3020 wrote to memory of 1172	3020	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	29
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30
PID 1172 wrote to memory of 1176	1172	windowsfiles.exe	30

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:3036
- C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
  "C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
    "C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1172
  - - 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:1176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

logs.dat

Path C:\Users\Admin\AppData\Roaming\windowsfiles\logs.dat
Size 144B
SHA256 fb319f19f28e69b81a5afeb5fba5cecd324cd8cac864533eb9b3db5917429c8c
MD5 84fff6d9d64384a1f217886c90f7cf67
SHA1 3040cfbabcd383e414f07b775d4ad45ff03b6166
SHA512 263fdf315b6b590849c1015a682e6f949a33677c58fb5e57fc8750f110a0e367bda2b2e7a804e95d7e77e319f81186f9ac3d5adf544f0dc2a2ddaacffc5f77c9
MD5 SHA1 SHA512

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windowsfiles.exe

Path \Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
Size 703KB
SHA256 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92
MD5 cfeae297e7b47d957e9e275ede703064
SHA1 f31ea0ebf131e7186acf028687581318642eff74
SHA512 ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a
SSDEEP 12288:HpIgdWtnyVADTJUSx1VUDp5eHKCREbiALl4JFznCy:XdWtnyVAJvx1VUKkOMOJ1C
MD5 SHA1 SHA512 SSDEEP

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memory/1172-53-0x00000000741E0000-0x00000000748CE000-memory.dmp

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memory/1172-35-0x00000000741E0000-0x00000000748CE000-memory.dmp

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memory/1172-34-0x0000000000A80000-0x0000000000B36000-memory.dmp

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memory/1172-37-0x0000000004950000-0x0000000004990000-memory.dmp

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memory/1176-67-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-79-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-99-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-98-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-93-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-91-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-86-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-85-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-80-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-59-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-73-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-72-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-66-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-65-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-48-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1176-60-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-54-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-56-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1176-58-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3020-5-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-3-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/3020-11-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-21-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-26-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-10-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-9-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-15-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-6-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-7-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3020-8-0x0000000000090000-0x0000000000112000-memory.dmp

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memory/3036-16-0x00000000747E0000-0x0000000074ECE000-memory.dmp

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memory/3036-2-0x0000000004500000-0x0000000004540000-memory.dmp

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memory/3036-1-0x00000000747E0000-0x0000000074ECE000-memory.dmp

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memory/3036-0-0x0000000000350000-0x0000000000406000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads