remcos | cd76524a5a1a193336ce0a72efa54af99367743c2d380d0416a1d09a516fad8b

Analysis

max time kernel
150s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
23-09-2024 14:29

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General

Target

Purchase Order.exe
Size

902KB
MD5

171f8a0f5bba2ba4fab8d479c65f6651
SHA1

a7e8546d3b1dc9482e5800497eb482518efd4427
SHA256

cd76524a5a1a193336ce0a72efa54af99367743c2d380d0416a1d09a516fad8b
SHA512

3e113f1f1afd56c9ba8ae44f24480f89a60db7f62432cfbf9b77320747f48881ac81bfa692c18692a92906372de70bd8538eea4a88c253fa7f4a6b67d4b5915c
SSDEEP

24576:TlFCHP+tB+XNpYpKwiQgAG5FgfsmW1bp9xDe6:pFEtXopK1QVG0fUpT

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:59321

nnamoo.duckdns.org:59321

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
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-41EVS0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1028	powershell.exe
3660	powershell.exe

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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	Purchase Order.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1104 set thread context of 2220	1104	Purchase Order.exe	98

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 5 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	Purchase Order.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3352	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1104	Purchase Order.exe
1028	powershell.exe
3660	powershell.exe
1104	Purchase Order.exe
3660	powershell.exe
1028	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1104	Purchase Order.exe
Token: SeDebugPrivilege	3660	powershell.exe
Token: SeDebugPrivilege	1028	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 1028	1104	Purchase Order.exe	92
PID 1104 wrote to memory of 1028	1104	Purchase Order.exe	92
PID 1104 wrote to memory of 1028	1104	Purchase Order.exe	92
PID 1104 wrote to memory of 3660	1104	Purchase Order.exe	94
PID 1104 wrote to memory of 3660	1104	Purchase Order.exe	94
PID 1104 wrote to memory of 3660	1104	Purchase Order.exe	94
PID 1104 wrote to memory of 3352	1104	Purchase Order.exe	96
PID 1104 wrote to memory of 3352	1104	Purchase Order.exe	96
PID 1104 wrote to memory of 3352	1104	Purchase Order.exe	96
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98
PID 1104 wrote to memory of 2220	1104	Purchase Order.exe	98

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1104
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1028
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YzFfWxw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3660
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YzFfWxw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDD50.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3352
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2220

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ingiseaz.jb0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpDD50.tmp

Filesize
1KB

MD5
1e26c33de088964ed6ec41a3a4317186

SHA1
a271e4bd1447ebc272caf1b92601403b919f4936

SHA256
8e92dd625dddd39ec4b27cc89dd0ec07dc125222f2c398ec64307d6f4d6b3f2d

SHA512
a970f64a2cc125eaf64d2841f4bcf5b95f9c26f3fa8fa2bddfab568420f286df8e02e0167717120acad655e46116d1f3866e9f9f4d68ca61e3fd94bab2c01260

Download Submit
memory/1028-88-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1028-16-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1028-81-0x0000000007650000-0x000000000765E000-memory.dmp

Filesize
56KB

Download
memory/1028-53-0x00000000753F0000-0x000000007543C000-memory.dmp

Filesize
304KB

Download
memory/1028-63-0x00000000072C0000-0x00000000072DE000-memory.dmp

Filesize
120KB

Download
memory/1028-52-0x0000000007280000-0x00000000072B2000-memory.dmp

Filesize
200KB

Download
memory/1028-65-0x00000000072E0000-0x0000000007383000-memory.dmp

Filesize
652KB

Download
memory/1028-19-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1028-15-0x0000000004B20000-0x0000000004B56000-memory.dmp

Filesize
216KB

Download
memory/1028-17-0x0000000005220000-0x0000000005848000-memory.dmp

Filesize
6.2MB

Download
memory/1104-0-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download
memory/1104-49-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1104-10-0x0000000009810000-0x00000000098AC000-memory.dmp

Filesize
624KB

Download
memory/1104-5-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1104-3-0x0000000005360000-0x00000000053F2000-memory.dmp

Filesize
584KB

Download
memory/1104-4-0x0000000005320000-0x000000000532A000-memory.dmp

Filesize
40KB

Download
memory/1104-6-0x0000000005900000-0x0000000005912000-memory.dmp

Filesize
72KB

Download
memory/1104-9-0x0000000007110000-0x00000000071CE000-memory.dmp

Filesize
760KB

Download
memory/1104-7-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download
memory/1104-8-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/1104-1-0x0000000000850000-0x0000000000938000-memory.dmp

Filesize
928KB

Download
memory/1104-2-0x0000000005910000-0x0000000005EB4000-memory.dmp

Filesize
5.6MB

Download
memory/2220-97-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-92-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-91-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-90-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2220-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3660-76-0x0000000007B80000-0x0000000007B9A000-memory.dmp

Filesize
104KB

Download
memory/3660-83-0x0000000007EC0000-0x0000000007EDA000-memory.dmp

Filesize
104KB

Download
memory/3660-84-0x0000000007EA0000-0x0000000007EA8000-memory.dmp

Filesize
32KB

Download
memory/3660-82-0x0000000007DC0000-0x0000000007DD4000-memory.dmp

Filesize
80KB

Download
memory/3660-80-0x0000000007D80000-0x0000000007D91000-memory.dmp

Filesize
68KB

Download
memory/3660-89-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/3660-79-0x0000000007E00000-0x0000000007E96000-memory.dmp

Filesize
600KB

Download
memory/3660-78-0x0000000007BF0000-0x0000000007BFA000-memory.dmp

Filesize
40KB

Download
memory/3660-75-0x00000000081C0000-0x000000000883A000-memory.dmp

Filesize
6.5MB

Download
memory/3660-18-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/3660-51-0x00000000068E0000-0x000000000692C000-memory.dmp

Filesize
304KB

Download
memory/3660-50-0x0000000006850000-0x000000000686E000-memory.dmp

Filesize
120KB

Download
memory/3660-20-0x0000000005790000-0x00000000057B2000-memory.dmp

Filesize
136KB

Download
memory/3660-21-0x0000000005FE0000-0x0000000006046000-memory.dmp

Filesize
408KB

Download
memory/3660-64-0x00000000753F0000-0x000000007543C000-memory.dmp

Filesize
304KB

Download
memory/3660-34-0x0000000006270000-0x00000000065C4000-memory.dmp

Filesize
3.3MB

Download
memory/3660-22-0x0000000006100000-0x0000000006166000-memory.dmp

Filesize
408KB

Download
memory/3660-24-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download