remcos | 37ba19cff4542435121885c904e1ecc9b664baa7c2c5826e3b81ed41e0d52698

General

Target

Project.exe
Size

6KB
MD5

fee53d5cc458aee8004396f72525b6d8
SHA1

e5d5c9486a6a6a83b0cec5a3651fa3c5833725d3
SHA256

30cb761998f92285b0e6dde6889ce264699566d277dec217e78c61aff0f2feac
SHA512

638a5a7e165a26fc621ecf8daa4abe67392740b361604a8860fd14f8bd608f43a5ceeb2172c11185afe9b8330e886ace9fda3e77c8a9f7aab1902943499c5900
SSDEEP

96:VxUySpmBOip4Gp0hMIer/9aNlAN4w/9x3zNt:I9mhp4GjoNmN4wzh

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

37.139.128.4:52324

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-Y28G2Q
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Project.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Cvmbynswwbl = "\"C:\\Users\\Admin\\AppData\\Roaming\\Cymsb\\Cvmbynswwbl.exe\""	Project.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4800 set thread context of 4268	4800	Project.exe	90

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1436	powershell.exe
1436	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	Project.exe
Token: SeDebugPrivilege	1436	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 1436	4800	Project.exe	84
PID 4800 wrote to memory of 1436	4800	Project.exe	84
PID 4800 wrote to memory of 1436	4800	Project.exe	84
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90
PID 4800 wrote to memory of 4268	4800	Project.exe	90

C:\Users\Admin\AppData\Local\Temp\Project.exe
"C:\Users\Admin\AppData\Local\Temp\Project.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAxAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1436
- C:\Users\Admin\AppData\Local\Temp\Project.exe
  C:\Users\Admin\AppData\Local\Temp\Project.exe
  2⤵
  PID:4268

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1436-140-0x0000000005B50000-0x0000000005BB6000-memory.dmp

Filesize
408KB

Download
memory/1436-142-0x00000000079E0000-0x000000000805A000-memory.dmp

Filesize
6.5MB

Download
memory/1436-143-0x0000000006880000-0x000000000689A000-memory.dmp

Filesize
104KB

Download
memory/1436-141-0x0000000006380000-0x000000000639E000-memory.dmp

Filesize
120KB

Download
memory/1436-137-0x0000000004DB0000-0x0000000004DE6000-memory.dmp

Filesize
216KB

Download
memory/1436-138-0x00000000054B0000-0x0000000005AD8000-memory.dmp

Filesize
6.2MB

Download
memory/1436-139-0x0000000005AE0000-0x0000000005B46000-memory.dmp

Filesize
408KB

Download
memory/4268-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4268-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4268-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4268-148-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4268-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4800-133-0x0000000006AE0000-0x0000000006B72000-memory.dmp

Filesize
584KB

Download
memory/4800-132-0x0000000000350000-0x0000000000358000-memory.dmp

Filesize
32KB

Download
memory/4800-135-0x0000000006BB0000-0x0000000006BD2000-memory.dmp

Filesize
136KB

Download
memory/4800-134-0x0000000007130000-0x00000000076D4000-memory.dmp

Filesize
5.6MB

Download

Analysis

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