remcos | 3bd9368a26c4c6a217e6cbfdd5bec484b2c4fa6c130904300b5e9a34aa7c5a4d

General

Target

OBA2.exe
Size

1.3MB
MD5

7c08c535a27a84112b04734130068d37
SHA1

424e25ad557624d5f2ecfab36e28e774fe108d88
SHA256

0a8997d917a20dd82784067c9b66d79b8967c619fdd42abf1721eb21a29a1900
SHA512

a366575062c44a28a721fa9922aa93e7f92c534e75f8167209a0b1f9b050ed108a9981c254441982e3265d3f55b500b656c934491840953d9aa3882abc53134b
SSDEEP

24576:Ctb20pkaCqT5TBWgNQ7aMMTB7SbexP0CaHIT7vu6A:PVg5tQ7aMMTB7Sbeamv25

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

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-ZFXG9Y
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
Drops startup file 1 IoCs

Processes:

slashing.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\slashing.vbs slashing.exe
Executes dropped EXE 1 IoCs

Processes:

slashing.exe

pid process

4728 slashing.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\slashing.vbs	slashing.exe

pid	process
4728	slashing.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Esher\slashing.exe	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

slashing.exesvchost.exe

description	pid	process	target process
PID 4728 set thread context of 2504	4728	slashing.exe	svchost.exe
PID 2504 set thread context of 2780	2504	svchost.exe	iexplore.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3912 4728 WerFault.exe slashing.exe

pid	pid_target	process	target process
3912	4728	WerFault.exe	slashing.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

OBA2.exeslashing.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OBA2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	slashing.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

svchost.exe

pid process

2504 svchost.exe
2504 svchost.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

slashing.exesvchost.exe

pid process

4728 slashing.exe
2504 svchost.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

OBA2.exeslashing.exe

pid process

2644 OBA2.exe
2644 OBA2.exe
4728 slashing.exe
4728 slashing.exe
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

OBA2.exeslashing.exe

pid process

2644 OBA2.exe
2644 OBA2.exe
4728 slashing.exe
4728 slashing.exe

pid	process
2504	svchost.exe
2504	svchost.exe

pid	process
4728	slashing.exe
2504	svchost.exe

pid	process
2644	OBA2.exe
2644	OBA2.exe
4728	slashing.exe
4728	slashing.exe

pid	process
2644	OBA2.exe
2644	OBA2.exe
4728	slashing.exe
4728	slashing.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

OBA2.exeslashing.exesvchost.exe

description	pid	process	target process
PID 2644 wrote to memory of 4728	2644	OBA2.exe	slashing.exe
PID 2644 wrote to memory of 4728	2644	OBA2.exe	slashing.exe
PID 2644 wrote to memory of 4728	2644	OBA2.exe	slashing.exe
PID 4728 wrote to memory of 2504	4728	slashing.exe	svchost.exe
PID 4728 wrote to memory of 2504	4728	slashing.exe	svchost.exe
PID 4728 wrote to memory of 2504	4728	slashing.exe	svchost.exe
PID 4728 wrote to memory of 2504	4728	slashing.exe	svchost.exe
PID 2504 wrote to memory of 2780	2504	svchost.exe	iexplore.exe
PID 2504 wrote to memory of 2780	2504	svchost.exe	iexplore.exe
PID 2504 wrote to memory of 2780	2504	svchost.exe	iexplore.exe
PID 2504 wrote to memory of 2780	2504	svchost.exe	iexplore.exe

C:\Users\Admin\AppData\Local\Temp\OBA2.exe
"C:\Users\Admin\AppData\Local\Temp\OBA2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2644
- C:\Users\Admin\AppData\Local\Esher\slashing.exe
  "C:\Users\Admin\AppData\Local\Temp\OBA2.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4728
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\OBA2.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2504
  - - \??\c:\program files (x86)\internet explorer\iexplore.exe
      "c:\program files (x86)\internet explorer\iexplore.exe"
      4⤵
      PID:2780
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4728 -s 732
    3⤵
    - Program crash
    PID:3912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4728 -ip 4728
1⤵
PID:4584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Esher\slashing.exe

Filesize
1.3MB

MD5
7c08c535a27a84112b04734130068d37

SHA1
424e25ad557624d5f2ecfab36e28e774fe108d88

SHA256
0a8997d917a20dd82784067c9b66d79b8967c619fdd42abf1721eb21a29a1900

SHA512
a366575062c44a28a721fa9922aa93e7f92c534e75f8167209a0b1f9b050ed108a9981c254441982e3265d3f55b500b656c934491840953d9aa3882abc53134b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nonplacental

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/2504-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2504-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2504-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2504-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2504-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2644-6-0x0000000000F90000-0x0000000001390000-memory.dmp

Filesize
4.0MB

Download
memory/2780-24-0x0000000000770000-0x000000000077E000-memory.dmp

Filesize
56KB

Download
memory/2780-26-0x0000000000770000-0x000000000077E000-memory.dmp

Filesize
56KB

Download
memory/2780-28-0x0000000000770000-0x000000000077E000-memory.dmp

Filesize
56KB

Download
memory/2780-29-0x0000000000770000-0x000000000077E000-memory.dmp

Filesize
56KB

Download
memory/4728-18-0x00000000018E0000-0x0000000001CE0000-memory.dmp

Filesize
4.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads