remcos | 3b69867aabd0912ec4d46c50f059d60fe8a541f4b18a0bca5eac711e921cb00b

General

Target

d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
Size

138KB
MD5

d3783d6b9ffaa2f440e4249b7d910867
SHA1

bd69cb0a5c9705f0c6aeacb79bc52f6ec3803771
SHA256

3b69867aabd0912ec4d46c50f059d60fe8a541f4b18a0bca5eac711e921cb00b
SHA512

11f5589160af4f6817ccb23fca9c4e6e936c5e8fe8c3ad86314d7f5b8e33610350764bf8ed79e9f3134b5441b5b1b8b2accff03761be2014b0271fc1c5589efe
SSDEEP

3072:ZU3RZlnfF8xGdaegugZm4t1FEMxFFS+bJ4zsUCjNaR1VgBlFJfAYMout:EZlnfF8xWzgZDt15FF3N42jxlFJCoS

Score

10^/10

remcos discovery persistence rat

Malware Config

Signatures

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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
228	HDC.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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KLGmkG = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsyncs\\HDC.exe\""	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KLGmkG = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsyncs\\HDC.exe\""	HDC.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 228 set thread context of 2616	228	HDC.exe	90

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 4 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	HDC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
2124	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2124	PING.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
228	HDC.exe
228	HDC.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
228	HDC.exe
228	HDC.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
228	HDC.exe
228	HDC.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 2832	2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe	86
PID 2164 wrote to memory of 2832	2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe	86
PID 2164 wrote to memory of 2832	2164	d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe	86
PID 2832 wrote to memory of 2124	2832	cmd.exe	88
PID 2832 wrote to memory of 2124	2832	cmd.exe	88
PID 2832 wrote to memory of 2124	2832	cmd.exe	88
PID 2832 wrote to memory of 228	2832	cmd.exe	89
PID 2832 wrote to memory of 228	2832	cmd.exe	89
PID 2832 wrote to memory of 228	2832	cmd.exe	89
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90
PID 228 wrote to memory of 2616	228	HDC.exe	90

C:\Users\Admin\AppData\Local\Temp\d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d3783d6b9ffaa2f440e4249b7d910867_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2164
- 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:2832
- - 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:2124
- - C:\Users\Admin\AppData\Roaming\Microsyncs\HDC.exe
    "C:\Users\Admin\AppData\Roaming\Microsyncs\HDC.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:228
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe
      4⤵
      PID:2616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
100B

MD5
b355235f831a1dc7d370c450c1f97e98

SHA1
aa60c9caaf83297f5f636dffb4f98b98737e7c18

SHA256
9164847d47eb56e5eef7742cfb589f3da06ac3d0d54d02adad80430944ac4ed4

SHA512
1439c040286f82da0fe8e0bacdd1dfd2d37782a4d012a2d19175e861f8db6b17eecab1f118b26bbab69fb76164ae98cb8b62a549e558adcfcc0e18a8cca5fba5

Download Submit
C:\Users\Admin\AppData\Roaming\Microsyncs\HDC.exe

Filesize
138KB

MD5
d3783d6b9ffaa2f440e4249b7d910867

SHA1
bd69cb0a5c9705f0c6aeacb79bc52f6ec3803771

SHA256
3b69867aabd0912ec4d46c50f059d60fe8a541f4b18a0bca5eac711e921cb00b

SHA512
11f5589160af4f6817ccb23fca9c4e6e936c5e8fe8c3ad86314d7f5b8e33610350764bf8ed79e9f3134b5441b5b1b8b2accff03761be2014b0271fc1c5589efe

Download Submit
memory/228-24-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/228-27-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-38-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-36-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-35-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-30-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-22-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/228-28-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2164-5-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2164-3-0x0000000077371000-0x0000000077491000-memory.dmp

Filesize
1.1MB

Download
memory/2164-0-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2164-9-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2164-15-0x0000000077371000-0x0000000077491000-memory.dmp

Filesize
1.1MB

Download
memory/2164-14-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2616-31-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2616-34-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads