remcos | 3916d1d5b6e609dba884d5c846c3f7a4f925e3e9f6d58e14cc7fa3595496abb4

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
01/06/2026, 22:10

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General

Target
tmpnhd0235c.exe
Size 410KB
Sample260601-13lrwsf19s
SHA256 3916d1d5b6e609dba884d5c846c3f7a4f925e3e9f6d58e14cc7fa3595496abb4
MD5 362c82ec3246cc7ce2274a433c3150aa
SHA1 b779de7f45c7a2499459bef431860120263d2942
SHA512 0067a4eb4833aebb6b6faad98b1cee7f19366fc2973ebee1ee35368b32d9d8527bc234c89227545d77996876b6ff16c386ab8d86d4e4155514381baf59ab46b2
SSDEEP 3072:vRfKPZp2rcw3mkRqer5+nnkkL4H1wIcq7Nl9/dF+blbxx9TQ3j5CvbU:vRaZQISqer5+nnRL4A89/dF
TLSH
T13C941653F752A8D5CA694679AF584281632BE462AF0B0392784C530ECF5338B9F56F3C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

host discovery remcos persistence rat upx

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

lucidair.ddns.net:8080

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
system64.exe
copy_folder
system64
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
keys
keylog_path
%AppData%
mouse_option
false
mutex
remcos_hsnmjifvmg
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
system64
take_screenshot_option
false
take_screenshot_time
5

Signatures

Family: Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	tmpnhd0235c.exe

Executes dropped EXE 2 IoCs

pid	Process
876	system64.exe
4884	system64.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system64 = "\"C:\\Users\\Admin\\AppData\\Roaming\\system64\\system64.exe\""	tmpnhd0235c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system64 = "\"C:\\Users\\Admin\\AppData\\Roaming\\system64\\system64.exe\""	system64.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 876 set thread context of 3696	876	system64.exe	95

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/memory/2852-6-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/files/0x000800000002451c-8.dat	upx
behavioral2/memory/876-9-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/memory/3696-11-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/memory/876-13-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/memory/4884-17-0x0000000000400000-0x0000000000480000-memory.dmp	upx
behavioral2/memory/4884-15-0x0000000000400000-0x0000000000480000-memory.dmp	upx

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	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpnhd0235c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	system64.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3480	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3480	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3696	iexplore.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2852 wrote to memory of 2924	2852	tmpnhd0235c.exe	89
PID 2924 wrote to memory of 3480	2924	cmd.exe	92
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 876 wrote to memory of 3696	876	system64.exe	95
PID 2924 wrote to memory of 4884	2924	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\tmpnhd0235c.exe
"C:\Users\Admin\AppData\Local\Temp\tmpnhd0235c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3480
- - C:\Users\Admin\AppData\Roaming\system64\system64.exe
    "C:\Users\Admin\AppData\Roaming\system64\system64.exe"
    3⤵
    - Executes dropped EXE
    PID:4884

C:\Users\Admin\AppData\Roaming\system64\system64.exe
"C:\Users\Admin\AppData\Roaming\system64\system64.exe"
1⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:876
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3696

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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install.bat

Path C:\Users\Admin\AppData\Local\Temp\install.bat
Size 103B
SHA256 0800a2efd997eb70f70dd36e9f15302b6aa1c25a346d0617c47eec1fd769e569
MD5 5cf1cb38428d1e37fe1c0fc68888cbba
SHA1 bbdf6b71317e6e17ab756c339ef710864db0a332
SHA512 95559e14e37329d7cd8f93d87a634d5471eed5136980653a4396443d50358e67dc99541a287be3c11c773b3c14b314b09f296a33ba08375f16076eccfaf20db2
TLSH
T1DEB012364A80C3BE1A0205174FB87829E732AC80264634084A8814685562414FBE2C30
MD5 SHA1 SHA512 TLSH

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system64.exe

Path C:\Users\Admin\AppData\Roaming\system64\system64.exe
Size 410KB
SHA256 3916d1d5b6e609dba884d5c846c3f7a4f925e3e9f6d58e14cc7fa3595496abb4
MD5 362c82ec3246cc7ce2274a433c3150aa
SHA1 b779de7f45c7a2499459bef431860120263d2942
SHA512 0067a4eb4833aebb6b6faad98b1cee7f19366fc2973ebee1ee35368b32d9d8527bc234c89227545d77996876b6ff16c386ab8d86d4e4155514381baf59ab46b2
SSDEEP 3072:vRfKPZp2rcw3mkRqer5+nnkkL4H1wIcq7Nl9/dF+blbxx9TQ3j5CvbU:vRaZQISqer5+nnRL4A89/dF
TLSH
T13C941653F752A8D5CA694679AF584281632BE462AF0B0392784C530ECF5338B9F56F3C
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/876-9-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/876-13-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/2852-0-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/2852-6-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/3696-11-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/4884-17-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/4884-15-0x0000000000400000-0x0000000000480000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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