remcos | 851950510f4760bded5792e8d8cfcbe2debf31c41b807e760495752d55674bc4

General

Target
9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe
Size 113KB
Sample240611-llsfsasckd
SHA256 851950510f4760bded5792e8d8cfcbe2debf31c41b807e760495752d55674bc4
MD5 9dbb7358e1d37ffaa33e16065310c067
SHA1 3505d6b6de8fb7b305e0e2f8cab8838e0c90ac1e
SHA512 e03d57f9ca0f87e80c25154a7cc53259ab14b9084d275ada84fca48f19703d0cce258da49e1e2b524cc3cda8403503dd9d3c4bc95474c4ddbbd5bd93fdec1689
SSDEEP 3072:TFNUcekHxRkuHxSWMDUajQJf/p/itxBCBpEzImXnr+vHI+zIcdWrA:THUcLxRkuRSWMDUaGf/p/sxWpEzImXqn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos tuks persistence rat

Malware Config

Extracted

Family

remcos

Version

2.0.5 Pro

Botnet

tuks

C2

127.0.0.1:2404
77.48.28.223:9030

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
tuks.exe
copy_folder
tuks
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
remcos
keylog_path
%AppData%
mouse_option
false
mutex
tuks-6PR8DL
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

Checks computer location settings 2 TTPs 2 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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4648	tuks.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\tuks\\tuks.exe\""	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\tuks\\tuks.exe\""	tuks.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4648 set thread context of 848	4648	tuks.exe	89

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000_Classes\Local Settings	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 1448	2288	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe	82
PID 2288 wrote to memory of 1448	2288	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe	82
PID 2288 wrote to memory of 1448	2288	9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe	82
PID 1448 wrote to memory of 4520	1448	WScript.exe	86
PID 1448 wrote to memory of 4520	1448	WScript.exe	86
PID 1448 wrote to memory of 4520	1448	WScript.exe	86
PID 4520 wrote to memory of 4648	4520	cmd.exe	88
PID 4520 wrote to memory of 4648	4520	cmd.exe	88
PID 4520 wrote to memory of 4648	4520	cmd.exe	88
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89
PID 4648 wrote to memory of 848	4648	tuks.exe	89

C:\Users\Admin\AppData\Local\Temp\9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9dbb7358e1d37ffaa33e16065310c067_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:1448
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\tuks\tuks.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4520
  - - C:\Users\Admin\AppData\Roaming\tuks\tuks.exe
      C:\Users\Admin\AppData\Roaming\tuks\tuks.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:4648
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:848

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

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 410B
SHA256 4292a5291657d6b27b1a42c51f14c0ada7652e3688f9ede79f00be84ecfb866c
MD5 5ae96867fd6ec53baa4465b9e4791b1c
SHA1 eae703c8faf748d959edea615197a0e9ba0a34ec
SHA512 f13b128c15c20a729c0d8000909cd4ac35b354bb641532359ce3028051ac454ed40896dee625e2b5ede795d8bd21e2636cf6809d1a16f68c67122709f919f138
MD5 SHA1 SHA512

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tuks.exe

Path C:\Users\Admin\AppData\Roaming\tuks\tuks.exe
Size 113KB
SHA256 851950510f4760bded5792e8d8cfcbe2debf31c41b807e760495752d55674bc4
MD5 9dbb7358e1d37ffaa33e16065310c067
SHA1 3505d6b6de8fb7b305e0e2f8cab8838e0c90ac1e
SHA512 e03d57f9ca0f87e80c25154a7cc53259ab14b9084d275ada84fca48f19703d0cce258da49e1e2b524cc3cda8403503dd9d3c4bc95474c4ddbbd5bd93fdec1689
SSDEEP 3072:TFNUcekHxRkuHxSWMDUajQJf/p/itxBCBpEzImXnr+vHI+zIcdWrA:THUcLxRkuRSWMDUaGf/p/sxWpEzImXqn
MD5 SHA1 SHA512 SSDEEP

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memory/848-8-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/848-10-0x0000000000400000-0x000000000041B000-memory.dmp

Download

memory/848-11-0x0000000000400000-0x000000000041B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads