remcos | 31febdf316e73eaa38c90143a5cd2351cdc4f4921ada4f6b053e5f9c2fa3d752

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
02/09/2024, 11:32

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General

Target
2024082801362910.exe
Size 908KB
Sample240902-nnapvszerh
SHA256 31febdf316e73eaa38c90143a5cd2351cdc4f4921ada4f6b053e5f9c2fa3d752
MD5 2fdf82bc3f069832d3599399c1387e07
SHA1 189ba992552eca7c89f430d084b3b29d3a4b18b8
SHA512 1a80c9bd3837c2f565f243d7f0bb8395642013887c1710555f3f1cdb06fea846b92871beb4e3473cdb55e0912ae76301bfef2bf5f1384cac4d02df95276f0e10
SSDEEP 24576:qOGdumZu8lNib6eFUhmekfhv74ROOY3xxXBN2:qduh23eFUhm9j4EOIXv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos 3456789 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

3456789

172.93.220.148:45682

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
765-8M14I5
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 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2200	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 328 set thread context of 2740	328	2024082801362910.exe	35

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	2024082801362910.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	2024082801362910.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
1948	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2200	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 328 wrote to memory of 2200	328	2024082801362910.exe	31
PID 328 wrote to memory of 2200	328	2024082801362910.exe	31
PID 328 wrote to memory of 2200	328	2024082801362910.exe	31
PID 328 wrote to memory of 2200	328	2024082801362910.exe	31
PID 328 wrote to memory of 1948	328	2024082801362910.exe	32
PID 328 wrote to memory of 1948	328	2024082801362910.exe	32
PID 328 wrote to memory of 1948	328	2024082801362910.exe	32
PID 328 wrote to memory of 1948	328	2024082801362910.exe	32
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35
PID 328 wrote to memory of 2740	328	2024082801362910.exe	35

C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe
"C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:328
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OXwtFifCEW.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2200
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OXwtFifCEW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEF2F.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1948
- C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe
  "C:\Users\Admin\AppData\Local\Temp\2024082801362910.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2740

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpEF2F.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpEF2F.tmp
Size 1KB
SHA256 ba7ac367827622c754f983eb4676198ce1028fb8feaffb58645b15caea2e47ac
MD5 3b8f6b33d10cc1fa5f8a88d01149a364
SHA1 71f7a0a16aecb785aa21a84cebd750c81028ff5f
SHA512 4adba5c861760b7566d1a934f88a2055c086bac73702ae6cbf30a9132812a095a240b80ede80d8d169515698172f40f99b89c32d74539a6e03fd02f464b974b6
MD5 SHA1 SHA512

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memory/328-35-0x0000000074CA0000-0x000000007538E000-memory.dmp

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memory/328-1-0x00000000008E0000-0x00000000009C6000-memory.dmp

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memory/328-2-0x0000000074CA0000-0x000000007538E000-memory.dmp

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memory/328-3-0x00000000004D0000-0x00000000004E8000-memory.dmp

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memory/328-4-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

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memory/328-5-0x0000000074CA0000-0x000000007538E000-memory.dmp

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memory/328-6-0x0000000005130000-0x00000000051EE000-memory.dmp

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memory/328-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

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memory/2740-26-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-36-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-28-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-34-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-33-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-32-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2740-14-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-24-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-22-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-20-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-18-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-16-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-31-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-37-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-38-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-40-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-41-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-42-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-44-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-43-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-45-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-46-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-47-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/2740-48-0x0000000000400000-0x000000000047F000-memory.dmp

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