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

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
448	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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\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 448 set thread context of 4436	448	Remc.exe	106

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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Remc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000_Classes\Local Settings	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
720	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
448	Remc.exe
448	Remc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 720 wrote to memory of 3928	720	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	102
PID 720 wrote to memory of 3928	720	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	102
PID 720 wrote to memory of 3928	720	cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe	102
PID 3928 wrote to memory of 4680	3928	WScript.exe	103
PID 3928 wrote to memory of 4680	3928	WScript.exe	103
PID 3928 wrote to memory of 4680	3928	WScript.exe	103
PID 4680 wrote to memory of 448	4680	cmd.exe	105
PID 4680 wrote to memory of 448	4680	cmd.exe	105
PID 4680 wrote to memory of 448	4680	cmd.exe	105
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106
PID 448 wrote to memory of 4436	448	Remc.exe	106

C:\Users\Admin\AppData\Local\Temp\cba17390b59f3c9380e24455c440d3eb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cba17390b59f3c9380e24455c440d3eb_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:720
- 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:3928
- - 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:4680
  - - 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:448
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:4436

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4460,i,4174666705242427184,7333705955694532165,262144 --variations-seed-version --mojo-platform-channel-handle=4512 /prefetch:8
1⤵
PID:2168

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
584KB

MD5
cba17390b59f3c9380e24455c440d3eb

SHA1
f3544f292336cf0f6e3a6163ccfda6ae6ed442b6

SHA256
3102123a62009a62e4a75da567d6b65abd2de23c739cba7486dff4337927fec4

SHA512
b3a5084bc86b9640b68240e60b9328d3a4d09765720a44722e593c2b2763898dfa451e05854fe476b360e5889caaf58f42c941f78a1e9385b3e0b0d3752b8777

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

Filesize
79B

MD5
10ce336af4bf7d9aa8858bcef42dc1b6

SHA1
5515ec65a267095029fa87ed89d0b30d25d1ac18

SHA256
3dab1f375f218843d3ac236fba50e58926ae1dccf394f29f537722d699e243da

SHA512
1a3001ef654e96727e6002ebb9012ab0c6fdb91765e63710d62f4763218d36efcd5acac867525130de9dbc31379f6d7fefb0f1a948bbb82ea297df618b90c175

Download Submit
memory/448-19-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/448-22-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/720-2-0x00000000774B1000-0x00000000775D1000-memory.dmp

Filesize
1.1MB

Download
memory/720-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/720-7-0x0000000000400000-0x0000000000494000-memory.dmp

Filesize
592KB

Download
memory/720-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4436-25-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads