remcos | 19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2023, 18:37

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General

Target

tmp.exe
Size

1002KB
MD5

8adf9b40df999fad8e478c9872f1022f
SHA1

7a035a3b378422cdc19dac99b80cf3695f1bca2d
SHA256

19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44
SHA512

80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd
SSDEEP

24576:8EnIzctHRQQDzSMWcpqIOT22UZAAwHeUb40CGk0NOf+DQ/kP:8sZ11LpqlzUZbwtXpk0NOf+U8

Score

10^/10

remcos maly 2023-host persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Maly 2023-Host

maly22333.ddnsking.com:3091

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
cos.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
mouse_option
false
mutex
Rmc-GY5GD6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
nsa
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat 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-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	tmp.exe

Executes dropped EXE 5 IoCs

pid	Process
4584	cos.exe
3752	cos.exe
968	cos.exe
1436	cos.exe
1440	cos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	tmp.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows\CurrentVersion\Run\	cos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	cos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	cos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	cos.exe
Key created	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2512 set thread context of 2180	2512	tmp.exe	89
PID 4584 set thread context of 1440	4584	cos.exe	94

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4584	cos.exe
4584	cos.exe
4584	cos.exe
4584	cos.exe
4584	cos.exe
4584	cos.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4584	cos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1440	cos.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2512 wrote to memory of 2180	2512	tmp.exe	89
PID 2180 wrote to memory of 4584	2180	tmp.exe	90
PID 2180 wrote to memory of 4584	2180	tmp.exe	90
PID 2180 wrote to memory of 4584	2180	tmp.exe	90
PID 4584 wrote to memory of 3752	4584	cos.exe	91
PID 4584 wrote to memory of 3752	4584	cos.exe	91
PID 4584 wrote to memory of 3752	4584	cos.exe	91
PID 4584 wrote to memory of 968	4584	cos.exe	92
PID 4584 wrote to memory of 968	4584	cos.exe	92
PID 4584 wrote to memory of 968	4584	cos.exe	92
PID 4584 wrote to memory of 1436	4584	cos.exe	93
PID 4584 wrote to memory of 1436	4584	cos.exe	93
PID 4584 wrote to memory of 1436	4584	cos.exe	93
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94
PID 4584 wrote to memory of 1440	4584	cos.exe	94

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Users\Admin\AppData\Roaming\cos.exe
    "C:\Users\Admin\AppData\Roaming\cos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4584
  - - C:\Users\Admin\AppData\Roaming\cos.exe
      "C:\Users\Admin\AppData\Roaming\cos.exe"
      4⤵
      Executes dropped EXE
      PID:3752
  - - C:\Users\Admin\AppData\Roaming\cos.exe
      "C:\Users\Admin\AppData\Roaming\cos.exe"
      4⤵
      Executes dropped EXE
      PID:968
  - - C:\Users\Admin\AppData\Roaming\cos.exe
      "C:\Users\Admin\AppData\Roaming\cos.exe"
      4⤵
      Executes dropped EXE
      PID:1436
  - - C:\Users\Admin\AppData\Roaming\cos.exe
      "C:\Users\Admin\AppData\Roaming\cos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1440

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\cos.exe

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

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

Filesize
1002KB

MD5
8adf9b40df999fad8e478c9872f1022f

SHA1
7a035a3b378422cdc19dac99b80cf3695f1bca2d

SHA256
19da8703857a46648c98bac2d6a458309ec882c173253fb8562019f865c94a44

SHA512
80461b3ecc965fd0322c7f29584157921b2096728cb29cb5a48f958fc65e996dba5891845f1ca7ab5f927e83aeee89350c9dd2d243ab3c5c7fe1496f6a29f8bd

Download Submit
memory/1440-172-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-174-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-185-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-184-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-183-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-182-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-181-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-178-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-175-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-173-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-171-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-170-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-168-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-167-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1440-165-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2180-141-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2180-143-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2180-144-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2180-146-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2180-157-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2512-138-0x0000000007B70000-0x0000000007D16000-memory.dmp

Filesize
1.6MB

Download
memory/2512-133-0x00000000006B0000-0x00000000007B0000-memory.dmp

Filesize
1024KB

Download
memory/2512-134-0x00000000056C0000-0x0000000005C64000-memory.dmp

Filesize
5.6MB

Download
memory/2512-139-0x0000000005370000-0x0000000005380000-memory.dmp

Filesize
64KB

Download
memory/2512-140-0x00000000080C0000-0x000000000815C000-memory.dmp

Filesize
624KB

Download
memory/2512-137-0x0000000005370000-0x0000000005380000-memory.dmp

Filesize
64KB

Download
memory/2512-136-0x0000000005180000-0x000000000518A000-memory.dmp

Filesize
40KB

Download
memory/2512-135-0x00000000051B0000-0x0000000005242000-memory.dmp

Filesize
584KB

Download
memory/4584-158-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4584-159-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download