remcos | 5bf4229985bd8de768c69b78eb377504f189c8123ead5d6ce798ebb92a401427

General

Target

Order.exe
Size

809KB
MD5

8849e2039f215fdc3d18270bff047810
SHA1

b5276ad1f216f5de3d2edccfa598a0eaf676821f
SHA256

ad39a998b7f7b0889d74b2377b4ef09cb4827b314052e6280f2925bdc06ae248
SHA512

4779f5586c928f606185418f1320a8255598a122018230e547053afea09971d6aee80273c75e0ba26facea459a315ee53325104f5cf689067f04135aad4d7638
SSDEEP

24576:url6kD68JmlotQf4uvwKMXeDyEpyrX5WIYz8g3Q:Ml328U2yfxvwdgSrpkz3

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

196.251.86.41:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-83VOGC
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

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

Executes dropped EXE 1 IoCs

pid	Process
3824	Countee.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/5472-18-0x00000000004C0000-0x0000000000682000-memory.dmp	autoit_exe
behavioral1/memory/3824-43-0x0000000000B70000-0x0000000000D32000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3824 set thread context of 4580	3824	Countee.exe	92

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/5472-0-0x00000000004C0000-0x0000000000682000-memory.dmp	upx
behavioral1/files/0x000c0000000240f5-15.dat	upx
behavioral1/memory/3824-16-0x0000000000B70000-0x0000000000D32000-memory.dmp	upx
behavioral1/memory/5472-18-0x00000000004C0000-0x0000000000682000-memory.dmp	upx
behavioral1/memory/3824-43-0x0000000000B70000-0x0000000000D32000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4996	3824	WerFault.exe	91

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Order.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Countee.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3824	Countee.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
5472	Order.exe
5472	Order.exe
3824	Countee.exe
3824	Countee.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
5472	Order.exe
5472	Order.exe
3824	Countee.exe
3824	Countee.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 5472 wrote to memory of 3824	5472	Order.exe	91
PID 5472 wrote to memory of 3824	5472	Order.exe	91
PID 5472 wrote to memory of 3824	5472	Order.exe	91
PID 3824 wrote to memory of 4580	3824	Countee.exe	92
PID 3824 wrote to memory of 4580	3824	Countee.exe	92
PID 3824 wrote to memory of 4580	3824	Countee.exe	92
PID 3824 wrote to memory of 4580	3824	Countee.exe	92

C:\Users\Admin\AppData\Local\Temp\Order.exe
"C:\Users\Admin\AppData\Local\Temp\Order.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:5472
- C:\Users\Admin\AppData\Local\buncal\Countee.exe
  "C:\Users\Admin\AppData\Local\Temp\Order.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:3824
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\Order.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4580
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3824 -s 680
    3⤵
    - Program crash
    PID:4996

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3824 -ip 3824
1⤵
PID:4808

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

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Downloads

C:\Users\Admin\AppData\Local\buncal\Countee.exe

Filesize
809KB

MD5
8849e2039f215fdc3d18270bff047810

SHA1
b5276ad1f216f5de3d2edccfa598a0eaf676821f

SHA256
ad39a998b7f7b0889d74b2377b4ef09cb4827b314052e6280f2925bdc06ae248

SHA512
4779f5586c928f606185418f1320a8255598a122018230e547053afea09971d6aee80273c75e0ba26facea459a315ee53325104f5cf689067f04135aad4d7638

Download Submit
memory/3824-43-0x0000000000B70000-0x0000000000D32000-memory.dmp

Filesize
1.8MB

Download
memory/3824-16-0x0000000000B70000-0x0000000000D32000-memory.dmp

Filesize
1.8MB

Download
memory/3824-33-0x0000000000DF0000-0x00000000011F0000-memory.dmp

Filesize
4.0MB

Download
memory/4580-41-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-44-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-35-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-36-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-37-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-39-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-38-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-40-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-42-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-57-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-56-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-55-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-46-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-47-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-48-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-49-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-50-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-51-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-52-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-53-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4580-54-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/5472-18-0x00000000004C0000-0x0000000000682000-memory.dmp

Filesize
1.8MB

Download
memory/5472-12-0x00000000013C0000-0x00000000017C0000-memory.dmp

Filesize
4.0MB

Download
memory/5472-0-0x00000000004C0000-0x0000000000682000-memory.dmp

Filesize
1.8MB

Download

Analysis

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