remcos | bc3e38148839e72cc594c795183adb3ba9664be94be03fb254e7c9232553077f

General

Target

file.exe
Size

744KB
MD5

447766638aad4f1a4e04568524e27e90
SHA1

8bfdd143a996a7db7abd6a00e634d6d04d115a1e
SHA256

bc3e38148839e72cc594c795183adb3ba9664be94be03fb254e7c9232553077f
SHA512

38e5abc10e894242ae98ee20dc6e3bf4cfd65bb8a4a9f6e78e2289db1c1614b180cf7471dee6fe09e8c3d725eb4aca09543ca1c41ac94070e38749b38330008a
SSDEEP

12288:hrRQSMl6m5YfhamfW47jScSJmvlPuFsuMGNO8BHZnRM+ErWbVdVKEdFa:h9zMl6mmfUmLqcSJmTKOuHHM+Erkpa

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:2080

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-6IHMTY
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
Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

468 svchost.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1776 cmd.exe

pid	process
468	svchost.exe

pid	process
1776	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

file.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	file.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

svchost.exe

description pid process target process

PID 468 set thread context of 316 468 svchost.exe SetupUtility.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1264 316 WerFault.exe SetupUtility.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

560 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1788 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

file.exesvchost.exe

pid process

1148 file.exe
468 svchost.exe
468 svchost.exe
468 svchost.exe
468 svchost.exe
468 svchost.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

file.exesvchost.exe

description pid process

Token: SeDebugPrivilege 1148 file.exe
Token: SeDebugPrivilege 468 svchost.exe

description	pid	process	target process
PID 468 set thread context of 316	468	svchost.exe	SetupUtility.exe

pid	pid_target	process	target process
1264	316	WerFault.exe	SetupUtility.exe

pid	process
560	schtasks.exe

pid	process
1788	timeout.exe

pid	process
1148	file.exe
468	svchost.exe
468	svchost.exe
468	svchost.exe
468	svchost.exe
468	svchost.exe

description	pid	process
Token: SeDebugPrivilege	1148	file.exe
Token: SeDebugPrivilege	468	svchost.exe

Suspicious use of WriteProcessMemory 50 IoCs

Processes:

file.execmd.execmd.exesvchost.exeSetupUtility.exe

description	pid	process	target process
PID 1148 wrote to memory of 884	1148	file.exe	cmd.exe
PID 1148 wrote to memory of 884	1148	file.exe	cmd.exe
PID 1148 wrote to memory of 884	1148	file.exe	cmd.exe
PID 884 wrote to memory of 560	884	cmd.exe	schtasks.exe
PID 884 wrote to memory of 560	884	cmd.exe	schtasks.exe
PID 884 wrote to memory of 560	884	cmd.exe	schtasks.exe
PID 1148 wrote to memory of 1776	1148	file.exe	cmd.exe
PID 1148 wrote to memory of 1776	1148	file.exe	cmd.exe
PID 1148 wrote to memory of 1776	1148	file.exe	cmd.exe
PID 1776 wrote to memory of 1788	1776	cmd.exe	timeout.exe
PID 1776 wrote to memory of 1788	1776	cmd.exe	timeout.exe
PID 1776 wrote to memory of 1788	1776	cmd.exe	timeout.exe
PID 1776 wrote to memory of 468	1776	cmd.exe	svchost.exe
PID 1776 wrote to memory of 468	1776	cmd.exe	svchost.exe
PID 1776 wrote to memory of 468	1776	cmd.exe	svchost.exe
PID 468 wrote to memory of 768	468	svchost.exe	WsatConfig.exe
PID 468 wrote to memory of 768	468	svchost.exe	WsatConfig.exe
PID 468 wrote to memory of 768	468	svchost.exe	WsatConfig.exe
PID 468 wrote to memory of 2012	468	svchost.exe	RegSvcs.exe
PID 468 wrote to memory of 2012	468	svchost.exe	RegSvcs.exe
PID 468 wrote to memory of 2012	468	svchost.exe	RegSvcs.exe
PID 468 wrote to memory of 1432	468	svchost.exe	Microsoft.Workflow.Compiler.exe
PID 468 wrote to memory of 1432	468	svchost.exe	Microsoft.Workflow.Compiler.exe
PID 468 wrote to memory of 1432	468	svchost.exe	Microsoft.Workflow.Compiler.exe
PID 468 wrote to memory of 864	468	svchost.exe	AddInUtil.exe
PID 468 wrote to memory of 864	468	svchost.exe	AddInUtil.exe
PID 468 wrote to memory of 864	468	svchost.exe	AddInUtil.exe
PID 468 wrote to memory of 1928	468	svchost.exe	mscorsvw.exe
PID 468 wrote to memory of 1928	468	svchost.exe	mscorsvw.exe
PID 468 wrote to memory of 1928	468	svchost.exe	mscorsvw.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 468 wrote to memory of 316	468	svchost.exe	SetupUtility.exe
PID 316 wrote to memory of 1264	316	SetupUtility.exe	WerFault.exe
PID 316 wrote to memory of 1264	316	SetupUtility.exe	WerFault.exe
PID 316 wrote to memory of 1264	316	SetupUtility.exe	WerFault.exe
PID 316 wrote to memory of 1264	316	SetupUtility.exe	WerFault.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1148

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:884

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
3⤵
- Creates scheduled task(s)
PID:560

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1776

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1788

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:468

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe"
4⤵
PID:768

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe"
4⤵
PID:2012

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe"
4⤵
PID:1432

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe"
4⤵
PID:864

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe"
4⤵
PID:1928

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\v4.7.03062\SetupUtility.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\v4.7.03062\SetupUtility.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 316 -s 168
5⤵
- Program crash
PID:1264

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp.bat
Filesize
150B

MD5
5d632f10322657898551092fc8e10f0e

SHA1
5d84da35660aca8aab064d27be1bf05ea0198cf2

SHA256
07f15187df43e930155ad56dd073dee3f39f0111b6429e9778a2fc919567f3c8

SHA512
eb0869ee7115543b93c1c6b8c623552f9aba82de2d73e04585b51ef4d69f3f6b301cefdeabd091d91e5bfde054a145de7b5c6a7454a1f9cfc46dacdef802a44e

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp.bat
Filesize
150B

MD5
5d632f10322657898551092fc8e10f0e

SHA1
5d84da35660aca8aab064d27be1bf05ea0198cf2

SHA256
07f15187df43e930155ad56dd073dee3f39f0111b6429e9778a2fc919567f3c8

SHA512
eb0869ee7115543b93c1c6b8c623552f9aba82de2d73e04585b51ef4d69f3f6b301cefdeabd091d91e5bfde054a145de7b5c6a7454a1f9cfc46dacdef802a44e

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
744KB

MD5
447766638aad4f1a4e04568524e27e90

SHA1
8bfdd143a996a7db7abd6a00e634d6d04d115a1e

SHA256
bc3e38148839e72cc594c795183adb3ba9664be94be03fb254e7c9232553077f

SHA512
38e5abc10e894242ae98ee20dc6e3bf4cfd65bb8a4a9f6e78e2289db1c1614b180cf7471dee6fe09e8c3d725eb4aca09543ca1c41ac94070e38749b38330008a

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
744KB

MD5
447766638aad4f1a4e04568524e27e90

SHA1
8bfdd143a996a7db7abd6a00e634d6d04d115a1e

SHA256
bc3e38148839e72cc594c795183adb3ba9664be94be03fb254e7c9232553077f

SHA512
38e5abc10e894242ae98ee20dc6e3bf4cfd65bb8a4a9f6e78e2289db1c1614b180cf7471dee6fe09e8c3d725eb4aca09543ca1c41ac94070e38749b38330008a

Download Submit
\Users\Admin\AppData\Roaming\svchost.exe
Filesize
744KB

MD5
447766638aad4f1a4e04568524e27e90

SHA1
8bfdd143a996a7db7abd6a00e634d6d04d115a1e

SHA256
bc3e38148839e72cc594c795183adb3ba9664be94be03fb254e7c9232553077f

SHA512
38e5abc10e894242ae98ee20dc6e3bf4cfd65bb8a4a9f6e78e2289db1c1614b180cf7471dee6fe09e8c3d725eb4aca09543ca1c41ac94070e38749b38330008a

Download Submit
memory/316-70-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/468-69-0x0000000000020000-0x00000000000DE000-memory.dmp

Filesize
760KB

Download
memory/1148-54-0x0000000001390000-0x000000000144E000-memory.dmp

Filesize
760KB

Download
memory/1148-55-0x000000001BF30000-0x000000001BFB0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads