remcos | 94338a235c9207ba31032496ba04d39ae887a3155c15d57347307df2dfa16242

Analysis

max time kernel
119s
max time network
121s
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 00:18

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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
1720	powershell.exe
2280	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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1972 set thread context of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101

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
2856	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2280	powershell.exe
2280	powershell.exe
1720	powershell.exe
1720	powershell.exe
2280	powershell.exe
1720	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	powershell.exe
Token: SeDebugPrivilege	2280	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
964	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1720	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	95
PID 1972 wrote to memory of 1720	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	95
PID 1972 wrote to memory of 1720	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	95
PID 1972 wrote to memory of 2280	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	97
PID 1972 wrote to memory of 2280	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	97
PID 1972 wrote to memory of 2280	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	97
PID 1972 wrote to memory of 2856	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	99
PID 1972 wrote to memory of 2856	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	99
PID 1972 wrote to memory of 2856	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	99
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101
PID 1972 wrote to memory of 964	1972	f4aedd9c8b06bf6f30404ae4c5de18c0N.exe	101

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:1972
- 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:1720
- 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:2280
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uULeEHHHWasTQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA4BC.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2856
- 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:964

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
a58231c14435c991122336f4b5a3424c

SHA1
82746e97b4fc6eb6b535a2382dd1774d1ad88c8e

SHA256
6652a85e863c4caa91c3baf620452af3bf8d8f02cf2a117108657f691dab8686

SHA512
82da5ce0bef0c1bbeb7a62b11a3396530142e9adef4bd288be0c5b3e834a0108133cbb4f33ed60b01a0619f99683ebe666a66dbb697a8f27ccdec79a4d92911e

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
c03838e9f5e46eb97441a1ffa5765b9d

SHA1
2eed911edd1feb249c27078cafbc2d5cae9b6a50

SHA256
29e2f3e3f4ebd3715f3fd5e698e36f8493b26a489d59f9a291da3cc5c1860046

SHA512
0f7639dba489a4654f157efe0f4e4df66bee484a3c417179f9fcf13404d983ebb3e0d522aba1792f44b82bfa0de2ae49aaddf061d95ad1512eca8673707540a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wvg0r0cd.rg0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA4BC.tmp

Filesize
1KB

MD5
7bdb20ee47dc6fcb9ff3804c9997b12f

SHA1
b0113475373c6059da34f51e34e2e5e5b603a167

SHA256
552f5185b9f6618f86fcd54a39bf4071d34af5aebac916c4200b520a989cff01

SHA512
4a2ba0bab224f5d08cde146c1ae37096af5517a07516eab966ba5e8da3811438f1343d2f5261f109920b78ed491e8cf7b00c6a0aaf7ed8039777a49039b6bbf7

Download Submit
memory/964-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/964-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/964-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/964-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1720-17-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1720-67-0x0000000075090000-0x00000000750DC000-memory.dmp

Filesize
304KB

Download
memory/1720-81-0x0000000007750000-0x000000000775A000-memory.dmp

Filesize
40KB

Download
memory/1720-16-0x0000000002B20000-0x0000000002B56000-memory.dmp

Filesize
216KB

Download
memory/1720-82-0x0000000007950000-0x00000000079E6000-memory.dmp

Filesize
600KB

Download
memory/1720-18-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1720-19-0x0000000005620000-0x0000000005C48000-memory.dmp

Filesize
6.2MB

Download
memory/1720-83-0x00000000078D0000-0x00000000078E1000-memory.dmp

Filesize
68KB

Download
memory/1720-94-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1720-84-0x0000000007900000-0x000000000790E000-memory.dmp

Filesize
56KB

Download
memory/1720-85-0x0000000007910000-0x0000000007924000-memory.dmp

Filesize
80KB

Download
memory/1720-23-0x0000000005490000-0x00000000054B2000-memory.dmp

Filesize
136KB

Download
memory/1720-29-0x0000000005E10000-0x0000000006164000-memory.dmp

Filesize
3.3MB

Download
memory/1972-8-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/1972-7-0x0000000005AC0000-0x0000000005AD2000-memory.dmp

Filesize
72KB

Download
memory/1972-6-0x0000000005AE0000-0x0000000005B7C000-memory.dmp

Filesize
624KB

Download
memory/1972-5-0x00000000059F0000-0x00000000059FA000-memory.dmp

Filesize
40KB

Download
memory/1972-53-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1972-3-0x0000000005710000-0x00000000057A2000-memory.dmp

Filesize
584KB

Download
memory/1972-4-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1972-10-0x0000000005B90000-0x0000000005BA0000-memory.dmp

Filesize
64KB

Download
memory/1972-2-0x0000000005C20000-0x00000000061C4000-memory.dmp

Filesize
5.6MB

Download
memory/1972-9-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1972-1-0x0000000000C20000-0x0000000000D0C000-memory.dmp

Filesize
944KB

Download
memory/1972-0-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/1972-11-0x0000000006B30000-0x0000000006BF0000-memory.dmp

Filesize
768KB

Download
memory/2280-26-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/2280-77-0x00000000070E0000-0x0000000007183000-memory.dmp

Filesize
652KB

Download
memory/2280-80-0x0000000007250000-0x000000000726A000-memory.dmp

Filesize
104KB

Download
memory/2280-79-0x00000000078A0000-0x0000000007F1A000-memory.dmp

Filesize
6.5MB

Download
memory/2280-76-0x0000000006410000-0x000000000642E000-memory.dmp

Filesize
120KB

Download
memory/2280-56-0x00000000064D0000-0x0000000006502000-memory.dmp

Filesize
200KB

Download
memory/2280-57-0x0000000075090000-0x00000000750DC000-memory.dmp

Filesize
304KB

Download
memory/2280-55-0x0000000006450000-0x000000000649C000-memory.dmp

Filesize
304KB

Download
memory/2280-54-0x0000000005F30000-0x0000000005F4E000-memory.dmp

Filesize
120KB

Download
memory/2280-86-0x0000000007590000-0x00000000075AA000-memory.dmp

Filesize
104KB

Download
memory/2280-87-0x0000000007570000-0x0000000007578000-memory.dmp

Filesize
32KB

Download
memory/2280-25-0x0000000005900000-0x0000000005966000-memory.dmp

Filesize
408KB

Download
memory/2280-24-0x0000000005810000-0x0000000005876000-memory.dmp

Filesize
408KB

Download
memory/2280-93-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/2280-21-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/2280-20-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download