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

Executes dropped EXE 1 IoCs

pid	Process
2752	Remc.exe

Loads dropped DLL 2 IoCs

pid	Process
2660	cmd.exe
2660	cmd.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-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\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 2752 set thread context of 2128	2752	Remc.exe	33

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

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
2752	Remc.exe
2752	Remc.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
2752	Remc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 1640	1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	29
PID 1144 wrote to memory of 1640	1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	29
PID 1144 wrote to memory of 1640	1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	29
PID 1144 wrote to memory of 1640	1144	ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe	29
PID 1640 wrote to memory of 2660	1640	WScript.exe	30
PID 1640 wrote to memory of 2660	1640	WScript.exe	30
PID 1640 wrote to memory of 2660	1640	WScript.exe	30
PID 1640 wrote to memory of 2660	1640	WScript.exe	30
PID 2660 wrote to memory of 2752	2660	cmd.exe	32
PID 2660 wrote to memory of 2752	2660	cmd.exe	32
PID 2660 wrote to memory of 2752	2660	cmd.exe	32
PID 2660 wrote to memory of 2752	2660	cmd.exe	32
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33
PID 2752 wrote to memory of 2128	2752	Remc.exe	33

C:\Users\Admin\AppData\Local\Temp\ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ccf9fd46a69a406c6a58f5159b329965_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1640
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remc\Remc.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2660
  - - 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 UnmapMainImage
      Suspicious use of WriteProcessMemory
      PID:2752
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:2128

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

System Information Discovery

1

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\logs.dat

Filesize
79B

MD5
b0da9d56d0ddf3157c5a31c4aad30b64

SHA1
b288417eb25e749750667a9b83497e79e75c25f4

SHA256
5bad0f28130e981df7012e28a5a5b415f20d1928a6ef7d30d0aa403e88ceccf6

SHA512
7fd491977f8a59c0e71ca016a874910ea58451fb1ca9a7c06eb22399e747c503e592fe128f385a3f53d4540a49d0c6017dfcbd1f6fd13a09592b7694ca5336a3

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

Filesize
556KB

MD5
ccf9fd46a69a406c6a58f5159b329965

SHA1
3dac39eac3061e2e83d1a07bcdc7bd2a6c025662

SHA256
eb49b4f516251a86ef5d49ab634e25e7a1f88a1855cb46799081183048a844ee

SHA512
6a9a0dffee79a6435281203f6ebf1e657242dc8a26116d3b21c26f8e58a9d7c967f4fc9d728ef1e72ce5c890a4d1b52d11e379cc8d8389cf4b502c59cd63dbd0

Download Submit
memory/1144-2-0x0000000077960000-0x0000000077A36000-memory.dmp

Filesize
856KB

Download
memory/1144-3-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1144-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1144-7-0x0000000072940000-0x0000000072A60000-memory.dmp

Filesize
1.1MB

Download
memory/1144-10-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1144-12-0x0000000072940000-0x0000000072A60000-memory.dmp

Filesize
1.1MB

Download
memory/2128-26-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-37-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-32-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-30-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-29-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-24-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2128-36-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2128-34-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2752-20-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2752-23-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2752-22-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads