remcos | 3c0f9981e85d84d77fbba8ee32632a07c6fcee5ec7570a7d1b854f02ed3374d4

Analysis

max time kernel
149s
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
24-09-2024 14:07

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General

Target

PO_33948576383mth_pdf.exe
Size

889KB
MD5

f0689dfa240f533acc8079bcbff064e8
SHA1

b4f9d193d9ff8f0302af25212dffc67292fb752c
SHA256

993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933
SHA512

12dcb5d05a8811ca7070a98acd844117097849044031920559d7043059d803effb54fe6f0cd0b579e899c964439f9929db6c00afbd6616cf2e949ab2df9c40b4
SSDEEP

24576:EnHNRRr5sff/UYS2DzidV2P6ktb8amzIoI:EnHNRRr5Q0YS2ydwR8TI

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
4672	powershell.exe
736	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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	PO_33948576383mth_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4792 set thread context of 2640	4792	PO_33948576383mth_pdf.exe	96

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO_33948576383mth_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2192	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4792	PO_33948576383mth_pdf.exe
4672	powershell.exe
736	powershell.exe
4792	PO_33948576383mth_pdf.exe
4792	PO_33948576383mth_pdf.exe
4792	PO_33948576383mth_pdf.exe
4672	powershell.exe
736	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4792	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	4672	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 4672	4792	PO_33948576383mth_pdf.exe	89
PID 4792 wrote to memory of 4672	4792	PO_33948576383mth_pdf.exe	89
PID 4792 wrote to memory of 4672	4792	PO_33948576383mth_pdf.exe	89
PID 4792 wrote to memory of 736	4792	PO_33948576383mth_pdf.exe	91
PID 4792 wrote to memory of 736	4792	PO_33948576383mth_pdf.exe	91
PID 4792 wrote to memory of 736	4792	PO_33948576383mth_pdf.exe	91
PID 4792 wrote to memory of 2192	4792	PO_33948576383mth_pdf.exe	93
PID 4792 wrote to memory of 2192	4792	PO_33948576383mth_pdf.exe	93
PID 4792 wrote to memory of 2192	4792	PO_33948576383mth_pdf.exe	93
PID 4792 wrote to memory of 4604	4792	PO_33948576383mth_pdf.exe	95
PID 4792 wrote to memory of 4604	4792	PO_33948576383mth_pdf.exe	95
PID 4792 wrote to memory of 4604	4792	PO_33948576383mth_pdf.exe	95
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96
PID 4792 wrote to memory of 2640	4792	PO_33948576383mth_pdf.exe	96

C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.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:4792
- 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\PO_33948576383mth_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4672
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WZiSWBRtQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:736
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCC87.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2192
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  PID:4604
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2640

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
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
cbed524e183451345518a64e31a1badc

SHA1
30294a5f62303a4d768714410e4595a1a9d97d01

SHA256
6467065daf2803896255a78ba459cccd6a79502f2faea85b1f9fa8aa1b23bcd9

SHA512
1dc15a53335943f69d12b527a215041e73eba3f7d34831495e41e1ff2f905b96e9994dee0304fcb8720c66c748bae1c9f77fe22951d4d65385dd59f83e93aa0e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sxtyp3nf.ptb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCC87.tmp

Filesize
1KB

MD5
b94486c3ccd19a370299287c09eaece5

SHA1
39e55ac2f73ad8116fe698c16021ad8d7be92f26

SHA256
3937c0c404c4ee6cb43c6d49c870b87e7995d592fdcd685ba3229b8295b40d17

SHA512
2e5b04205faf50ef697675c9b05fb71a6ee1a3a7247034368896e8cb62000f8d6fdb8117d1d722cdd64af1b858d4bebc37562de8d0ddc517735c512e861d43bc

Download Submit
memory/736-85-0x0000000007C00000-0x0000000007C1A000-memory.dmp

Filesize
104KB

Download
memory/736-83-0x0000000007AF0000-0x0000000007AFE000-memory.dmp

Filesize
56KB

Download
memory/736-57-0x000000006F020000-0x000000006F06C000-memory.dmp

Filesize
304KB

Download
memory/736-77-0x0000000007790000-0x0000000007833000-memory.dmp

Filesize
652KB

Download
memory/736-80-0x0000000007930000-0x000000000793A000-memory.dmp

Filesize
40KB

Download
memory/736-81-0x0000000007B40000-0x0000000007BD6000-memory.dmp

Filesize
600KB

Download
memory/736-92-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/736-30-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/736-82-0x0000000007AC0000-0x0000000007AD1000-memory.dmp

Filesize
68KB

Download
memory/736-86-0x0000000007BE0000-0x0000000007BE8000-memory.dmp

Filesize
32KB

Download
memory/736-20-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/2640-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2640-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-18-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-79-0x00000000072B0000-0x00000000072CA000-memory.dmp

Filesize
104KB

Download
memory/4672-52-0x0000000006550000-0x000000000659C000-memory.dmp

Filesize
304KB

Download
memory/4672-51-0x0000000005F80000-0x0000000005F9E000-memory.dmp

Filesize
120KB

Download
memory/4672-56-0x000000006F020000-0x000000006F06C000-memory.dmp

Filesize
304KB

Download
memory/4672-55-0x00000000071A0000-0x00000000071D2000-memory.dmp

Filesize
200KB

Download
memory/4672-67-0x0000000006530000-0x000000000654E000-memory.dmp

Filesize
120KB

Download
memory/4672-22-0x00000000050B0000-0x00000000050D2000-memory.dmp

Filesize
136KB

Download
memory/4672-78-0x0000000007910000-0x0000000007F8A000-memory.dmp

Filesize
6.5MB

Download
memory/4672-15-0x0000000002670000-0x00000000026A6000-memory.dmp

Filesize
216KB

Download
memory/4672-23-0x00000000057B0000-0x0000000005816000-memory.dmp

Filesize
408KB

Download
memory/4672-35-0x0000000005980000-0x0000000005CD4000-memory.dmp

Filesize
3.3MB

Download
memory/4672-24-0x0000000005910000-0x0000000005976000-memory.dmp

Filesize
408KB

Download
memory/4672-19-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-84-0x00000000074F0000-0x0000000007504000-memory.dmp

Filesize
80KB

Download
memory/4672-93-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-17-0x0000000005180000-0x00000000057A8000-memory.dmp

Filesize
6.2MB

Download
memory/4672-16-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4792-0-0x000000007452E000-0x000000007452F000-memory.dmp

Filesize
4KB

Download
memory/4792-50-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4792-10-0x000000000B8C0000-0x000000000B95C000-memory.dmp

Filesize
624KB

Download
memory/4792-9-0x0000000008FF0000-0x00000000090AE000-memory.dmp

Filesize
760KB

Download
memory/4792-8-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4792-7-0x000000007452E000-0x000000007452F000-memory.dmp

Filesize
4KB

Download
memory/4792-6-0x00000000057E0000-0x00000000057F2000-memory.dmp

Filesize
72KB

Download
memory/4792-5-0x00000000052E0000-0x00000000052EA000-memory.dmp

Filesize
40KB

Download
memory/4792-4-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/4792-3-0x0000000005330000-0x00000000053C2000-memory.dmp

Filesize
584KB

Download
memory/4792-2-0x0000000005840000-0x0000000005DE4000-memory.dmp

Filesize
5.6MB

Download
memory/4792-1-0x0000000000820000-0x0000000000904000-memory.dmp

Filesize
912KB

Download