remcos | c42c37c46206d1beab2ca15b75af8b1f8b9c0ace15155f8ce934749ca05ea250

Analysis

max time kernel
147s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2023, 17:01

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General

Target

cheque-000000005903.exe
Size

634KB
MD5

dccb7779a1ced7b8c1b0274c527daeb6
SHA1

cc4c4fe4e133e654f06a3587cb0f39e32f7cd8ab
SHA256

c42c37c46206d1beab2ca15b75af8b1f8b9c0ace15155f8ce934749ca05ea250
SHA512

73a02c75b78e2e6fd159f3e043376ae87c064b4ae09cfc0b55bbdbaa66dff68c768b4b47adc7c3565e635391538f328f3882734e99256dd0ee37d0230917bd77
SSDEEP

12288:jzY4JyS7t9CqZsFVhDvzuJSgfvZGnNoKeProTGYB4llcOI+1BDEAmD:mG1mhjzuJ9pONLePrHlmaD

Score

10^/10

remcos errai rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

errai

185.189.112.11:9625

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
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
struv
keylog_path
%AppData%
mouse_option
false
mutex
remcos_ybbjowldsb
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-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	cheque-000000005903.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1976 set thread context of 4052	1976	cheque-000000005903.exe	98

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
1976	cheque-000000005903.exe
3000	powershell.exe
3000	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	cheque-000000005903.exe
Token: SeDebugPrivilege	3000	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4052	cheque-000000005903.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 3000	1976	cheque-000000005903.exe	94
PID 1976 wrote to memory of 3000	1976	cheque-000000005903.exe	94
PID 1976 wrote to memory of 3000	1976	cheque-000000005903.exe	94
PID 1976 wrote to memory of 2028	1976	cheque-000000005903.exe	96
PID 1976 wrote to memory of 2028	1976	cheque-000000005903.exe	96
PID 1976 wrote to memory of 2028	1976	cheque-000000005903.exe	96
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98
PID 1976 wrote to memory of 4052	1976	cheque-000000005903.exe	98

C:\Users\Admin\AppData\Local\Temp\cheque-000000005903.exe
"C:\Users\Admin\AppData\Local\Temp\cheque-000000005903.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\puwiddYokD.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3000
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\puwiddYokD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3A16.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2028
- C:\Users\Admin\AppData\Local\Temp\cheque-000000005903.exe
  "C:\Users\Admin\AppData\Local\Temp\cheque-000000005903.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:4052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_e3lsbvsu.kpd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3A16.tmp

Filesize
1KB

MD5
aad723825a7ff9cd87ee4e91146b7faf

SHA1
9c2364a1de16b456493d140bc551e56aa872600e

SHA256
1bfc2c389bbc9049d1e3475e7124d6d7e5116c98d83e5e867cb06e561cd461d8

SHA512
15b9d9803eba703da4372e81fce70b8a10ee67726e87950046e4cd257d7756ea025686c6fe5f5a3679eecc412f8e0b0fd2ef957c86f826b3e80a93c910b71ed1

Download Submit
memory/1976-8-0x0000000005C00000-0x0000000005C10000-memory.dmp

Filesize
64KB

Download
memory/1976-9-0x0000000006DF0000-0x0000000006DFC000-memory.dmp

Filesize
48KB

Download
memory/1976-4-0x0000000005C00000-0x0000000005C10000-memory.dmp

Filesize
64KB

Download
memory/1976-5-0x0000000005940000-0x000000000594A000-memory.dmp

Filesize
40KB

Download
memory/1976-6-0x0000000006AD0000-0x0000000006AEE000-memory.dmp

Filesize
120KB

Download
memory/1976-7-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/1976-2-0x0000000005F20000-0x00000000064C4000-memory.dmp

Filesize
5.6MB

Download
memory/1976-3-0x0000000005970000-0x0000000005A02000-memory.dmp

Filesize
584KB

Download
memory/1976-10-0x0000000006E00000-0x0000000006E10000-memory.dmp

Filesize
64KB

Download
memory/1976-11-0x00000000087E0000-0x000000000883A000-memory.dmp

Filesize
360KB

Download
memory/1976-12-0x000000000AF40000-0x000000000AFDC000-memory.dmp

Filesize
624KB

Download
memory/1976-1-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/1976-32-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/1976-0-0x0000000000EC0000-0x0000000000F64000-memory.dmp

Filesize
656KB

Download
memory/3000-31-0x0000000005310000-0x0000000005376000-memory.dmp

Filesize
408KB

Download
memory/3000-47-0x0000000004D70000-0x0000000004D80000-memory.dmp

Filesize
64KB

Download
memory/3000-21-0x0000000004D70000-0x0000000004D80000-memory.dmp

Filesize
64KB

Download
memory/3000-72-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/3000-69-0x0000000007700000-0x0000000007708000-memory.dmp

Filesize
32KB

Download
memory/3000-28-0x00000000051F0000-0x0000000005212000-memory.dmp

Filesize
136KB

Download
memory/3000-19-0x0000000004D70000-0x0000000004D80000-memory.dmp

Filesize
64KB

Download
memory/3000-68-0x0000000007720000-0x000000000773A000-memory.dmp

Filesize
104KB

Download
memory/3000-34-0x0000000005A90000-0x0000000005AF6000-memory.dmp

Filesize
408KB

Download
memory/3000-18-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/3000-67-0x0000000007620000-0x0000000007634000-memory.dmp

Filesize
80KB

Download
memory/3000-17-0x0000000002790000-0x00000000027C6000-memory.dmp

Filesize
216KB

Download
memory/3000-44-0x0000000005B00000-0x0000000005E54000-memory.dmp

Filesize
3.3MB

Download
memory/3000-45-0x00000000060D0000-0x00000000060EE000-memory.dmp

Filesize
120KB

Download
memory/3000-46-0x0000000006110000-0x000000000615C000-memory.dmp

Filesize
304KB

Download
memory/3000-22-0x00000000053B0000-0x00000000059D8000-memory.dmp

Filesize
6.2MB

Download
memory/3000-48-0x0000000007090000-0x00000000070C2000-memory.dmp

Filesize
200KB

Download
memory/3000-49-0x0000000071A80000-0x0000000071ACC000-memory.dmp

Filesize
304KB

Download
memory/3000-59-0x0000000006690000-0x00000000066AE000-memory.dmp

Filesize
120KB

Download
memory/3000-60-0x00000000070D0000-0x0000000007173000-memory.dmp

Filesize
652KB

Download
memory/3000-61-0x0000000007A20000-0x000000000809A000-memory.dmp

Filesize
6.5MB

Download
memory/3000-62-0x00000000073E0000-0x00000000073FA000-memory.dmp

Filesize
104KB

Download
memory/3000-63-0x0000000007450000-0x000000000745A000-memory.dmp

Filesize
40KB

Download
memory/3000-64-0x0000000007660000-0x00000000076F6000-memory.dmp

Filesize
600KB

Download
memory/3000-65-0x00000000075E0000-0x00000000075F1000-memory.dmp

Filesize
68KB

Download
memory/3000-66-0x0000000007610000-0x000000000761E000-memory.dmp

Filesize
56KB

Download
memory/4052-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4052-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4052-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4052-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4052-74-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download