remcos | c46e7b8033aac457b4387c32fba170baf72bfb5a0b378523b225cc51d7f2f92d

General

Target

3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
Size

2.2MB
MD5

3f97d2a4e5b5a16d9607fe9dfb7ca2c0
SHA1

6264e3311d3c3b0b2ee7b866c3d0a1452031d5e4
SHA256

c46e7b8033aac457b4387c32fba170baf72bfb5a0b378523b225cc51d7f2f92d
SHA512

9b1c08df12092774e82f7a2b4c3196eb9a56796581f73ecd321582106254791a48216d448d91f966fc64017ae2e6b0dca116e421d56a8b515a8768857e0cb44c
SSDEEP

24576:mD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJmFu:mp7E+QrFUBgq2Snau

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
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 1 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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe

Executes dropped EXE 2 IoCs

pid	Process
4080	sbietrcl.exe
5104	sbietrcl.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4080 set thread context of 5104	4080	sbietrcl.exe	92

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 2 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	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
4080	sbietrcl.exe
4080	sbietrcl.exe
4080	sbietrcl.exe
4080	sbietrcl.exe
4080	sbietrcl.exe
4080	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
Token: SeDebugPrivilege	4080	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4080	452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe	91
PID 452 wrote to memory of 4080	452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe	91
PID 452 wrote to memory of 4080	452	3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe	91
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92
PID 4080 wrote to memory of 5104	4080	sbietrcl.exe	92

C:\Users\Admin\AppData\Local\Temp\3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe
"C:\Users\Admin\AppData\Local\Temp\3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:5104

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\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
2.2MB

MD5
92099829337f7331560dc81e0cc36c54

SHA1
e96abab693c649b7e86e2afd027bbdd0fb5ec201

SHA256
72b743fd04ad1b141ef261b5818b26682c69f0604e80b14ea3a334ccc9e5b0e9

SHA512
bc06abcfc80840f09285f72f79e012a618b143ffb75df5af624c712b70e1d4a90ca82a60881518235f4ff72a107db4b2a30f9fcd565c69e7a16e4c8847bef88e

Download Submit
memory/452-19-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/452-30-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/452-5-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/452-6-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/452-18-0x0000000075592000-0x0000000075593000-memory.dmp

Filesize
4KB

Download
memory/452-0-0x0000000075592000-0x0000000075593000-memory.dmp

Filesize
4KB

Download
memory/452-1-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/452-2-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4080-31-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4080-32-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4080-34-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4080-33-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/4080-40-0x0000000075590000-0x0000000075B41000-memory.dmp

Filesize
5.7MB

Download
memory/5104-36-0x0000000000540000-0x0000000000557000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads