remcos | 66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490

General

Target

66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe
Size

851KB
MD5

ff6f202ace40743852a03f34b7b41707
SHA1

31e96d82538ecd77f5a190bbc070065cb64bd12b
SHA256

66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490
SHA512

94edc736129032ae8c07db023f9d264c9743aab4cf2d294de995d780c71dcda33b7637a23e8161dbdf830fa4affd030bbe3912d7d0acc5b9061b81ee42e8d174
SSDEEP

24576:KYBfQYzELibC4jGl7Wud08XzvFn9j5Utq:KYBtbC4ql0ozt9j5Ut

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.175.229.139:8823

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-2BGC0K
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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe	Powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe	Powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2980 set thread context of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
32	Powershell.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4520	1608	WerFault.exe	88

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	Powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
32	Powershell.exe
32	Powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	32	Powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 32	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	86
PID 2980 wrote to memory of 32	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	86
PID 2980 wrote to memory of 32	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	86
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88
PID 2980 wrote to memory of 1608	2980	66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe	88

C:\Users\Admin\AppData\Local\Temp\66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe
"C:\Users\Admin\AppData\Local\Temp\66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
  "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
  2⤵
  - Drops startup file
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:32
- C:\Users\Admin\AppData\Local\Temp\66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe
  "C:\Users\Admin\AppData\Local\Temp\66c50343775c162862ac27a735c66927a9b3fda4a05cd0eaa21fecbca3f6c490.exe"
  2⤵
  PID:1608
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1608 -s 192
    3⤵
    - Program crash
    PID:4520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 1608 -ip 1608
1⤵
PID:1676

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\Temp\__PSScriptPolicyTest_p0fatoiy.bvv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/32-9-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/32-11-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/32-44-0x0000000006940000-0x0000000006962000-memory.dmp

Filesize
136KB

Download
memory/32-42-0x0000000007660000-0x00000000076F6000-memory.dmp

Filesize
600KB

Download
memory/32-27-0x00000000069E0000-0x0000000006A2C000-memory.dmp

Filesize
304KB

Download
memory/32-26-0x0000000006460000-0x000000000647E000-memory.dmp

Filesize
120KB

Download
memory/32-43-0x00000000068F0000-0x000000000690A000-memory.dmp

Filesize
104KB

Download
memory/32-15-0x0000000005E10000-0x0000000005E76000-memory.dmp

Filesize
408KB

Download
memory/32-25-0x0000000005E80000-0x00000000061D4000-memory.dmp

Filesize
3.3MB

Download
memory/32-10-0x0000000005670000-0x0000000005C98000-memory.dmp

Filesize
6.2MB

Download
memory/32-12-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/32-8-0x0000000002B50000-0x0000000002B86000-memory.dmp

Filesize
216KB

Download
memory/32-13-0x0000000005490000-0x00000000054B2000-memory.dmp

Filesize
136KB

Download
memory/32-14-0x00000000055B0000-0x0000000005616000-memory.dmp

Filesize
408KB

Download
memory/32-48-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/1608-34-0x0000000000900000-0x0000000000982000-memory.dmp

Filesize
520KB

Download
memory/1608-29-0x0000000000900000-0x0000000000982000-memory.dmp

Filesize
520KB

Download
memory/1608-39-0x0000000000900000-0x0000000000982000-memory.dmp

Filesize
520KB

Download
memory/2980-7-0x0000000005690000-0x000000000572C000-memory.dmp

Filesize
624KB

Download
memory/2980-6-0x0000000005400000-0x00000000054AE000-memory.dmp

Filesize
696KB

Download
memory/2980-5-0x00000000053F0000-0x00000000053FA000-memory.dmp

Filesize
40KB

Download
memory/2980-28-0x00000000055F0000-0x00000000055F8000-memory.dmp

Filesize
32KB

Download
memory/2980-0-0x0000000074CDE000-0x0000000074CDF000-memory.dmp

Filesize
4KB

Download
memory/2980-41-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/2980-4-0x0000000074CD0000-0x0000000075480000-memory.dmp

Filesize
7.7MB

Download
memory/2980-3-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/2980-2-0x0000000005980000-0x0000000005F24000-memory.dmp

Filesize
5.6MB

Download
memory/2980-1-0x0000000000940000-0x0000000000A1C000-memory.dmp

Filesize
880KB

Download

Analysis

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