remcos | 94338a235c9207ba31032496ba04d39ae887a3155c15d57347307df2dfa16242

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
24-08-2024 14:37

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General

Target

f4aedd9c8b06bf6f30404ae4c5de18c0N.exe
Size

936KB
MD5

f4aedd9c8b06bf6f30404ae4c5de18c0
SHA1

9f3b3c5c600416806ca99050f0fe8428e0215720
SHA256

94338a235c9207ba31032496ba04d39ae887a3155c15d57347307df2dfa16242
SHA512

bb95bb409162e2eb1b4b17f52409c91ed38ac4fb695944fb88607df96279778626af650db6028d96e8bce742480ad9f3971896e08e6417712ee06a256111e39a
SSDEEP

24576:Y9MC/qaSu32aV7pOsOwCWiB3F8mUlUAPrs3L0hMa2aa1ucko/8gv:riUu32I+jFvU6APA70hMaz+koX

Score

10^/10

remcos aug 20c2 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

Aug 20C2

method8888.ddns.net:6902

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-81VELC
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

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
3720	powershell.exe
4392	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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4656 set thread context of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100

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	f4aedd9c8b06bf6f30404ae4c5de18c0N.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	f4aedd9c8b06bf6f30404ae4c5de18c0N.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
1192	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3720	powershell.exe
3720	powershell.exe
4392	powershell.exe
4392	powershell.exe
4392	powershell.exe
3720	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4392	powershell.exe
Token: SeDebugPrivilege	3720	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2948	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 4392	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	94
PID 4656 wrote to memory of 4392	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	94
PID 4656 wrote to memory of 4392	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	94
PID 4656 wrote to memory of 3720	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	96
PID 4656 wrote to memory of 3720	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	96
PID 4656 wrote to memory of 3720	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	96
PID 4656 wrote to memory of 1192	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	98
PID 4656 wrote to memory of 1192	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	98
PID 4656 wrote to memory of 1192	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	98
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100
PID 4656 wrote to memory of 2948	4656	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	100

C:\Users\Admin\AppData\Local\Temp\f4aedd9c8b06bf6f30404ae4c5de18c0N.exe
"C:\Users\Admin\AppData\Local\Temp\f4aedd9c8b06bf6f30404ae4c5de18c0N.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4656
- 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\f4aedd9c8b06bf6f30404ae4c5de18c0N.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4392
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uULeEHHHWasTQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3720
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uULeEHHHWasTQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9460.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1192
- C:\Users\Admin\AppData\Local\Temp\f4aedd9c8b06bf6f30404ae4c5de18c0N.exe
  "C:\Users\Admin\AppData\Local\Temp\f4aedd9c8b06bf6f30404ae4c5de18c0N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2948

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
8acb9b557c293c1fcc3e59663d78cd76

SHA1
d16d497a5b889df046fd8d25f232a2458d605f37

SHA256
18f1e3572dc52afebeb335c2b1250e45d3a2749aa301aabfe2cc7f0d14cbd77e

SHA512
eb09a3b43f646445a07d0a0c65227c23896fc3988c0899bceaeee3d554435110b9fc75fa132bdd7d7d5b07a1598a83eb923cad70e36417abffa61b9b2cf1482b

Download Submit
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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
1bb4535fb36d04870d7eca394819ae69

SHA1
0aa131b204b0738d8c1819b5f7dbd6ae5b4a8fd9

SHA256
6b49786dfd7425b537e203f6713f3f89b3117edda14cf0091a172bdc3e5e09ce

SHA512
47d8894680acd05b002b0b640fc891b4380c4bd3ed79e79a30eb981bc95fbd53cfd8b3f58c8d8c53a566b6321274a722748f0f706438c397a29b371454e619cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w3iihmwq.js3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9460.tmp

Filesize
1KB

MD5
ece5943901ed80257f17b4a354193613

SHA1
bef67ccee35c2fb4fe93615ee29ca436a81243c4

SHA256
b433270c909a02a8145d716c093cd39fdcdc475ec191b932f617efec2556e3d9

SHA512
9c6cb0730447e96506ffae75df9f347b7890ec0d3845045ed30d5ce855e697b705e3696fbd8005e538d2cc56a271310fbb61e8a29288e7214059b6e486b5f3aa

Download Submit
memory/2948-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2948-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2948-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2948-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3720-87-0x0000000007F00000-0x0000000007F1A000-memory.dmp

Filesize
104KB

Download
memory/3720-70-0x0000000075020000-0x000000007506C000-memory.dmp

Filesize
304KB

Download
memory/3720-86-0x0000000007E00000-0x0000000007E14000-memory.dmp

Filesize
80KB

Download
memory/3720-24-0x0000000006130000-0x0000000006196000-memory.dmp

Filesize
408KB

Download
memory/3720-28-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/3720-26-0x00000000062A0000-0x00000000065F4000-memory.dmp

Filesize
3.3MB

Download
memory/3720-22-0x00000000058F0000-0x0000000005912000-memory.dmp

Filesize
136KB

Download
memory/3720-20-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/3720-21-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/3720-23-0x0000000005FD0000-0x0000000006036000-memory.dmp

Filesize
408KB

Download
memory/3720-94-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4392-17-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4392-84-0x0000000007DB0000-0x0000000007DC1000-memory.dmp

Filesize
68KB

Download
memory/4392-19-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4392-27-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4392-95-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4392-16-0x0000000002F70000-0x0000000002FA6000-memory.dmp

Filesize
216KB

Download
memory/4392-88-0x0000000007ED0000-0x0000000007ED8000-memory.dmp

Filesize
32KB

Download
memory/4392-85-0x0000000007DE0000-0x0000000007DEE000-memory.dmp

Filesize
56KB

Download
memory/4392-18-0x00000000059D0000-0x0000000005FF8000-memory.dmp

Filesize
6.2MB

Download
memory/4392-83-0x0000000007E30000-0x0000000007EC6000-memory.dmp

Filesize
600KB

Download
memory/4392-82-0x0000000007C20000-0x0000000007C2A000-memory.dmp

Filesize
40KB

Download
memory/4392-55-0x0000000006870000-0x000000000688E000-memory.dmp

Filesize
120KB

Download
memory/4392-56-0x0000000006BF0000-0x0000000006C3C000-memory.dmp

Filesize
304KB

Download
memory/4392-57-0x0000000007860000-0x0000000007892000-memory.dmp

Filesize
200KB

Download
memory/4392-68-0x0000000006E60000-0x0000000006E7E000-memory.dmp

Filesize
120KB

Download
memory/4392-58-0x0000000075020000-0x000000007506C000-memory.dmp

Filesize
304KB

Download
memory/4392-69-0x0000000007AA0000-0x0000000007B43000-memory.dmp

Filesize
652KB

Download
memory/4392-80-0x00000000081F0000-0x000000000886A000-memory.dmp

Filesize
6.5MB

Download
memory/4392-81-0x0000000007BB0000-0x0000000007BCA000-memory.dmp

Filesize
104KB

Download
memory/4656-5-0x0000000004E30000-0x0000000004E3A000-memory.dmp

Filesize
40KB

Download
memory/4656-54-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4656-8-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/4656-9-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4656-10-0x00000000060B0000-0x00000000060C0000-memory.dmp

Filesize
64KB

Download
memory/4656-6-0x00000000057E0000-0x000000000587C000-memory.dmp

Filesize
624KB

Download
memory/4656-7-0x0000000005880000-0x0000000005892000-memory.dmp

Filesize
72KB

Download
memory/4656-11-0x00000000060F0000-0x00000000061B0000-memory.dmp

Filesize
768KB

Download
memory/4656-4-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4656-3-0x0000000004D20000-0x0000000004DB2000-memory.dmp

Filesize
584KB

Download
memory/4656-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/4656-2-0x0000000005230000-0x00000000057D4000-memory.dmp

Filesize
5.6MB

Download
memory/4656-1-0x0000000000250000-0x000000000033C000-memory.dmp

Filesize
944KB

Download