remcos | 3102123a62009a62e4a75da567d6b65abd2de23c739cba7486dff4337927fec4

General

Target

cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
Size

584KB
MD5

cba17390b59f3c9380e24455c440d3eb
SHA1

f3544f292336cf0f6e3a6163ccfda6ae6ed442b6
SHA256

3102123a62009a62e4a75da567d6b65abd2de23c739cba7486dff4337927fec4
SHA512

b3a5084bc86b9640b68240e60b9328d3a4d09765720a44722e593c2b2763898dfa451e05854fe476b360e5889caaf58f42c941f78a1e9385b3e0b0d3752b8777
SSDEEP

12288:2/XPRr7jlWuyfvHv4HOo9TfC/lIWrpcUx2gluSzTSqFQalf:2/5/U/fvgHOoNfCiWl7zuShQalf

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
2740	Remc.exe

Loads dropped DLL 2 IoCs

pid	Process
2644	cmd.exe
2644	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\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 2740 set thread context of 2604	2740	Remc.exe	34

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	cba17390b59f3c9380e24455c440d3eb_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
2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
2740	Remc.exe
2740	Remc.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
2740	Remc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2672	2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2672	2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2672	2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	30
PID 2216 wrote to memory of 2672	2216	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	30
PID 2672 wrote to memory of 2644	2672	WScript.exe	31
PID 2672 wrote to memory of 2644	2672	WScript.exe	31
PID 2672 wrote to memory of 2644	2672	WScript.exe	31
PID 2672 wrote to memory of 2644	2672	WScript.exe	31
PID 2644 wrote to memory of 2740	2644	cmd.exe	33
PID 2644 wrote to memory of 2740	2644	cmd.exe	33
PID 2644 wrote to memory of 2740	2644	cmd.exe	33
PID 2644 wrote to memory of 2740	2644	cmd.exe	33
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34
PID 2740 wrote to memory of 2604	2740	Remc.exe	34

C:\Users\Admin\AppData\Local\Temp\cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cba17390b59f3c9380e24455c440d3eb_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:2216
- 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:2672
- - 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:2644
  - - 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:2740
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:2604

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
4372f575d82a254d62aefc7b3ab960fe

SHA1
570977d9b42e1a07614db7d9416307469fc15964

SHA256
912ef5e98d7f6009f5d7e6c0f6e8869906aa431447cbe1a6601b91137519d082

SHA512
2d8702ed505a89333d486b79e1b96fe6bd539efe3cb22c26c90b635432e5f0c15e33427c6ffcbdc3e4133f938e7f7fd4deaf1f0f9d5032ced7335dfe287502a0

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

Filesize
584KB

MD5
cba17390b59f3c9380e24455c440d3eb

SHA1
f3544f292336cf0f6e3a6163ccfda6ae6ed442b6

SHA256
3102123a62009a62e4a75da567d6b65abd2de23c739cba7486dff4337927fec4

SHA512
b3a5084bc86b9640b68240e60b9328d3a4d09765720a44722e593c2b2763898dfa451e05854fe476b360e5889caaf58f42c941f78a1e9385b3e0b0d3752b8777

Download Submit
memory/2216-2-0x0000000077200000-0x00000000772D6000-memory.dmp

Filesize
856KB

Download
memory/2216-3-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2216-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2216-7-0x0000000072940000-0x0000000072A60000-memory.dmp

Filesize
1.1MB

Download
memory/2216-12-0x0000000072940000-0x0000000072A60000-memory.dmp

Filesize
1.1MB

Download
memory/2216-11-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-35-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-38-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-37-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-33-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-31-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-29-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-27-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2604-25-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2740-23-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2740-20-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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