remcos | eb49b4f516251a86ef5d49ab634e25e7a1f88a1855cb46799081183048a844ee

General

Target

ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
Size

556KB
MD5

ccf9fd46a69a406c6a58f5159b329965
SHA1

3dac39eac3061e2e83d1a07bcdc7bd2a6c025662
SHA256

eb49b4f516251a86ef5d49ab634e25e7a1f88a1855cb46799081183048a844ee
SHA512

6a9a0dffee79a6435281203f6ebf1e657242dc8a26116d3b21c26f8e58a9d7c967f4fc9d728ef1e72ce5c890a4d1b52d11e379cc8d8389cf4b502c59cd63dbd0
SSDEEP

6144:dXGR7onTiRtFc4EhQfIytKzSzLjCUBkNG7NgY1MW2wiWQD9+Wjc:dg7oItFNfIyt3BuMNgY1M0iW/W

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 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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3500	Remc.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-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	Remc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3500 set thread context of 1208	3500	Remc.exe	99

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	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Remc.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000_Classes\Local Settings	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3788	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
3500	Remc.exe
3500	Remc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3788 wrote to memory of 4200	3788	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	95
PID 3788 wrote to memory of 4200	3788	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	95
PID 3788 wrote to memory of 4200	3788	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	95
PID 4200 wrote to memory of 968	4200	WScript.exe	96
PID 4200 wrote to memory of 968	4200	WScript.exe	96
PID 4200 wrote to memory of 968	4200	WScript.exe	96
PID 968 wrote to memory of 3500	968	cmd.exe	98
PID 968 wrote to memory of 3500	968	cmd.exe	98
PID 968 wrote to memory of 3500	968	cmd.exe	98
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99
PID 3500 wrote to memory of 1208	3500	Remc.exe	99

C:\Users\Admin\AppData\Local\Temp\ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3788
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4200
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remc\Remc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:968
  - - C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
      C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3500
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:1208

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
410B

MD5
837b54af2c8d285fb69d719cc9061206

SHA1
b31b75216a46b744eb0d89dd9885431a8ecde820

SHA256
353bf067c7071e2b6904205a0f6755433a8711a4b2a9b48ac32ff538463f0e46

SHA512
6cc4e846538cf16de26004343a157a565fe9730ad5c253e3fb6c64098405849e732bd2216fbdecd52cc3cbcb84e24e4dca23b5fd4f68bcdc0e73d485479e2311

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

Filesize
556KB

MD5
ccf9fd46a69a406c6a58f5159b329965

SHA1
3dac39eac3061e2e83d1a07bcdc7bd2a6c025662

SHA256
eb49b4f516251a86ef5d49ab634e25e7a1f88a1855cb46799081183048a844ee

SHA512
6a9a0dffee79a6435281203f6ebf1e657242dc8a26116d3b21c26f8e58a9d7c967f4fc9d728ef1e72ce5c890a4d1b52d11e379cc8d8389cf4b502c59cd63dbd0

Download Submit
C:\Users\Admin\AppData\Roaming\Remc\logs.dat

Filesize
79B

MD5
4e843c2e9ec957b9d5f46ff88dc9b4d4

SHA1
afe160aca491da8f6ecc1ea201ad59fc15ad3a03

SHA256
5a434dee1be9471b0a5282ed1112edbbebdb801c7a6cd95da36988639d7fb99d

SHA512
e9de0b423f2deb87c33630d03411fa28dfa868cd353b908677f41c140b35c42de7010355febce0f0c64d54a3902815a290285446238971ea03892439dabb21e6

Download Submit
memory/1208-23-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3500-18-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3500-21-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3788-2-0x0000000076EC1000-0x0000000076FE1000-memory.dmp

Filesize
1.1MB

Download
memory/3788-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3788-7-0x0000000000400000-0x000000000048B000-memory.dmp

Filesize
556KB

Download
memory/3788-10-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads