remcos | 1f75782173ef3b1b68650a95b7846bb35faa400d53b52fc1ad8b65a86bc72c88

General

Target

FG098700000000.exe
Size

768KB
MD5

989054c5af86019ccfa32642ae628639
SHA1

5fe55707a4eebd51723ea950aa80d3a49e810207
SHA256

1f75782173ef3b1b68650a95b7846bb35faa400d53b52fc1ad8b65a86bc72c88
SHA512

401e5f2508ddc81d24047cbf707f35c121fcc07c9e2be6f477175ee275e970a52e0aedb905ce0ca026645477d4b89dfb989dc9361302c037d632d67fe3e128d9
SSDEEP

12288:oYV6MorX7qzuC3QHO9FQVHPF51jgcHJqOhTbYQ270cUq+rMxw0GakFQjIE8xQPPK:HBXu9HGaVHH75bYjVM1T4M3aCjpn7

Score

10^/10

remcos remotehost discovery rat upx

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 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1392	stickers.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4900-0-0x00000000005E0000-0x000000000078D000-memory.dmp	upx
behavioral2/files/0x00070000000233c2-14.dat	upx
behavioral2/memory/1392-15-0x0000000000EB0000-0x000000000105D000-memory.dmp	upx
behavioral2/memory/4900-16-0x00000000005E0000-0x000000000078D000-memory.dmp	upx
behavioral2/memory/1392-39-0x0000000000EB0000-0x000000000105D000-memory.dmp	upx

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4900-16-0x00000000005E0000-0x000000000078D000-memory.dmp	autoit_exe
behavioral2/memory/1392-39-0x0000000000EB0000-0x000000000105D000-memory.dmp	autoit_exe

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	FG098700000000.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stickers.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
4900	FG098700000000.exe
4900	FG098700000000.exe
1392	stickers.exe
1392	stickers.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
4900	FG098700000000.exe
4900	FG098700000000.exe
1392	stickers.exe
1392	stickers.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 1392	4900	FG098700000000.exe	87
PID 4900 wrote to memory of 1392	4900	FG098700000000.exe	87
PID 4900 wrote to memory of 1392	4900	FG098700000000.exe	87

C:\Users\Admin\AppData\Local\Temp\FG098700000000.exe
"C:\Users\Admin\AppData\Local\Temp\FG098700000000.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Users\Admin\AppData\Local\cacostomia\stickers.exe
  "C:\Users\Admin\AppData\Local\Temp\FG098700000000.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1392

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
53d1620db5ae2d117b8af69b2b19f93a

SHA1
0d431c1267215e3b4c086aa8f1c78991d4c984cb

SHA256
e8e430ca61bf1b86ef12b9a87f39cad3058398e6adebc71f7ca82f79de2dd590

SHA512
a97c87f719b6b67333b5a1ae7430cafa9d8ae6255af3f11a6281dccfad8c4e0e5adb6967158bcc653809822480f142278fecbff8a15fc4cad73f945512851df9

Download Submit
C:\Users\Admin\AppData\Local\cacostomia\stickers.exe

Filesize
768KB

MD5
989054c5af86019ccfa32642ae628639

SHA1
5fe55707a4eebd51723ea950aa80d3a49e810207

SHA256
1f75782173ef3b1b68650a95b7846bb35faa400d53b52fc1ad8b65a86bc72c88

SHA512
401e5f2508ddc81d24047cbf707f35c121fcc07c9e2be6f477175ee275e970a52e0aedb905ce0ca026645477d4b89dfb989dc9361302c037d632d67fe3e128d9

Download Submit
memory/1392-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-15-0x0000000000EB0000-0x000000000105D000-memory.dmp

Filesize
1.7MB

Download
memory/1392-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-39-0x0000000000EB0000-0x000000000105D000-memory.dmp

Filesize
1.7MB

Download
memory/1392-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1392-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4900-11-0x00000000005B0000-0x00000000005B4000-memory.dmp

Filesize
16KB

Download
memory/4900-16-0x00000000005E0000-0x000000000078D000-memory.dmp

Filesize
1.7MB

Download
memory/4900-0-0x00000000005E0000-0x000000000078D000-memory.dmp

Filesize
1.7MB

Download

Analysis

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