remcos | b8a49ac815304cdd65672b205775cc8b39a0b7e40d0957dda287e6895d88bfca

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2024 17:09

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General

Target

9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe
Size

458KB
MD5

9cd0bf7bf33966e9c0f74b800e8ff8ef
SHA1

3f12b5cb09ace394dc1f0af4f3beed819da5e9cc
SHA256

b8a49ac815304cdd65672b205775cc8b39a0b7e40d0957dda287e6895d88bfca
SHA512

5ad078bfee68bed5eddc790a011f67b38cce4fbfa47d9512957c302f1b42451b072ca0c5a0fbbfbe2057a8a8cc3da26434d04140252d6c4769325a01540e8802
SSDEEP

6144:/Y7O/lGq3T4mjtsQ+ak3c3daX9QsiQ4Kt9MIUUlD/EiE8oJOKV:gjYT4SIazQtGQxyIUKDMTNJBV

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

gdyhjjdhbvxgsfe.gotdns.ch:1996

Attributes

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

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
548	fsd.exe
4688	fsd.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-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ioa = "\"C:\\Users\\Admin\\AppData\\Roaming\\fsd.exe\""	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ioa = "\"C:\\Users\\Admin\\AppData\\Roaming\\fsd.exe\""	fsd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 692 set thread context of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 548 set thread context of 4688	548	fsd.exe	106

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	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.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	fsd.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
2928	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2928	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4688	fsd.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 692 wrote to memory of 2352	692	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	101
PID 2352 wrote to memory of 1732	2352	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	102
PID 2352 wrote to memory of 1732	2352	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	102
PID 2352 wrote to memory of 1732	2352	9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe	102
PID 1732 wrote to memory of 2928	1732	cmd.exe	104
PID 1732 wrote to memory of 2928	1732	cmd.exe	104
PID 1732 wrote to memory of 2928	1732	cmd.exe	104
PID 1732 wrote to memory of 548	1732	cmd.exe	105
PID 1732 wrote to memory of 548	1732	cmd.exe	105
PID 1732 wrote to memory of 548	1732	cmd.exe	105
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106
PID 548 wrote to memory of 4688	548	fsd.exe	106

C:\Users\Admin\AppData\Local\Temp\9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:692
- C:\Users\Admin\AppData\Local\Temp\9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\9cd0bf7bf33966e9c0f74b800e8ff8ef_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1732
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2928
  - - C:\Users\Admin\AppData\Roaming\fsd.exe
      "C:\Users\Admin\AppData\Roaming\fsd.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:548
    - - C:\Users\Admin\AppData\Roaming\fsd.exe
        
        "C:\Users\Admin\AppData\Roaming\fsd.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:4688

Network

MITRE ATT&CK Enterprise v15

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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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
89B

MD5
0ba9b63278e8f4ffce5472db6801fe6e

SHA1
a547eb08912c77ceb378326c635b53f1bd32f91b

SHA256
50f2f595594020af4a3aa65fb42b0b999f28869c2bf44b4dedbc1bfd683a167f

SHA512
7a2b354c9ce47d9e7912797ab0b1d78b514266adca3c376d3344b6cd6a0a1f6d9fe4784153013ca67dd93bf3daf22a09ee359668ce2e09449bc7c71b882d07d2

Download Submit
C:\Users\Admin\AppData\Roaming\fsd.exe

Filesize
458KB

MD5
9cd0bf7bf33966e9c0f74b800e8ff8ef

SHA1
3f12b5cb09ace394dc1f0af4f3beed819da5e9cc

SHA256
b8a49ac815304cdd65672b205775cc8b39a0b7e40d0957dda287e6895d88bfca

SHA512
5ad078bfee68bed5eddc790a011f67b38cce4fbfa47d9512957c302f1b42451b072ca0c5a0fbbfbe2057a8a8cc3da26434d04140252d6c4769325a01540e8802

Download Submit
memory/692-11-0x0000000005C90000-0x0000000005CAE000-memory.dmp

Filesize
120KB

Download
memory/692-20-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/692-4-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/692-5-0x0000000004B10000-0x0000000004B1A000-memory.dmp

Filesize
40KB

Download
memory/692-6-0x0000000005CB0000-0x0000000005D4C000-memory.dmp

Filesize
624KB

Download
memory/692-7-0x0000000004F20000-0x0000000004F2C000-memory.dmp

Filesize
48KB

Download
memory/692-8-0x000000007511E000-0x000000007511F000-memory.dmp

Filesize
4KB

Download
memory/692-9-0x0000000075110000-0x00000000758C0000-memory.dmp

Filesize
7.7MB

Download
memory/692-0-0x000000007511E000-0x000000007511F000-memory.dmp

Filesize
4KB

Download
memory/692-1-0x0000000000020000-0x0000000000098000-memory.dmp

Filesize
480KB

Download
memory/692-2-0x0000000004F60000-0x0000000005504000-memory.dmp

Filesize
5.6MB

Download
memory/692-3-0x0000000004A50000-0x0000000004AE2000-memory.dmp

Filesize
584KB

Download
memory/692-10-0x00000000064B0000-0x0000000006500000-memory.dmp

Filesize
320KB

Download
memory/2352-12-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2352-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2352-15-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2352-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4688-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads