remcos | 303e415db0644366a316524070b046b1b2a5dd2441258d6295859abc74f352ff

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 05:03

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General

Target

CalculatorMod.exe
Size

604KB
MD5

fbcf58f9ce64d200379298fcd87aa56b
SHA1

74388b7d29b042a1dabfeda00066eda76a9cf348
SHA256

303e415db0644366a316524070b046b1b2a5dd2441258d6295859abc74f352ff
SHA512

3873f23e8a350b812f7edb6770cc625604a877d658453ddd4f4a84b975d88dbbfb19c071a1f089eeb21fb524edd8bdd395aa5e8b484b87ce29480e9ca39e32df
SSDEEP

12288:MLKzlyrLuJygHZ8C2V3Oliayg2Mj1ngA+0mqwgqi59CU:uIyrCJygn2ZOlX1nz3wgqiHr

Score

10^/10

remcos remotehost12 discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost12

rem24251mr.duckdns.org:24251

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-P0KZ2Q
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3668 set thread context of 3932	3668	CalculatorMod.exe	93

System Location Discovery: System Language Discovery 1 TTPs 2 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	CalculatorMod.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CalculatorMod.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	CalculatorMod.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3932	CalculatorMod.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93
PID 3668 wrote to memory of 3932	3668	CalculatorMod.exe	93

C:\Users\Admin\AppData\Local\Temp\CalculatorMod.exe
"C:\Users\Admin\AppData\Local\Temp\CalculatorMod.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Users\Admin\AppData\Local\Temp\CalculatorMod.exe
  "C:\Users\Admin\AppData\Local\Temp\CalculatorMod.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3932

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3820,i,2904906934812054273,11716976550456127484,262144 --variations-seed-version --mojo-platform-channel-handle=1424 /prefetch:8
1⤵
PID:5528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
c5e1ec0f6074659b6199b47c4b11edea

SHA1
0274a13a88045a139aa3f53c47b3bc10e121c33b

SHA256
8b28532ed5445ceea99bce2b3901185a298f7b608db19ca80826dc8e47a3e753

SHA512
03d9b8e2ac3ac7971a8d881cc202766252458dd7ae769e2b4df455efb11b637b81555829b4741fa8f75d31cc9fe2a3a6fc8eff81159a6f4769365ae1de227c39

Download Submit
memory/3668-0-0x000000007524E000-0x000000007524F000-memory.dmp

Filesize
4KB

Download
memory/3668-1-0x0000000000CB0000-0x0000000000D4C000-memory.dmp

Filesize
624KB

Download
memory/3668-2-0x0000000005AC0000-0x0000000006064000-memory.dmp

Filesize
5.6MB

Download
memory/3668-3-0x00000000055F0000-0x0000000005682000-memory.dmp

Filesize
584KB

Download
memory/3668-4-0x0000000005690000-0x0000000005726000-memory.dmp

Filesize
600KB

Download
memory/3668-5-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3668-6-0x00000000057C0000-0x00000000057CA000-memory.dmp

Filesize
40KB

Download
memory/3668-7-0x00000000059C0000-0x0000000005A5C000-memory.dmp

Filesize
624KB

Download
memory/3668-8-0x00000000057F0000-0x00000000057FA000-memory.dmp

Filesize
40KB

Download
memory/3668-19-0x0000000075240000-0x00000000759F0000-memory.dmp

Filesize
7.7MB

Download
memory/3932-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-91-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-97-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3932-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download