remcos | 12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1

General

Target

12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
Size

1.3MB
MD5

f484f16874ddb071b45cb9f1fa8d0c56
SHA1

8cf9f6ab9a0a8520650145ae1702cc35f0e4b123
SHA256

12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1
SHA512

a20a46f56d408e9b2b5dcf956c9dec9a1170885fbbcb7c24a8caa6ed7202c30309bc72dc7a4c193ddb6f13cdc4c94e5f105e6d76cdff5b1d0585c7d807318e15
SSDEEP

24576:Qu6J33O0c+JY5UZ+XC0kGso6Fauf9v8AWLJgm9Ko2YyVWY:au0c++OCvkGs9Fauf9vJwJH9cYvY

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

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

Executes dropped EXE 1 IoCs

pid	Process
4876	ambiparous.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/1188-6-0x0000000001620000-0x0000000001A20000-memory.dmp	autoit_exe
behavioral2/files/0x0008000000023c51-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4876 set thread context of 1396	4876	ambiparous.exe	85
PID 1396 set thread context of 1372	1396	svchost.exe	88

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3636	4876	WerFault.exe	83

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	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ambiparous.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1396	svchost.exe
1396	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4876	ambiparous.exe
1396	svchost.exe

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
4876	ambiparous.exe
4876	ambiparous.exe
4876	ambiparous.exe

Suspicious use of SendNotifyMessage 6 IoCs

pid	Process
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
4876	ambiparous.exe
4876	ambiparous.exe
4876	ambiparous.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 4876	1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe	83
PID 1188 wrote to memory of 4876	1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe	83
PID 1188 wrote to memory of 4876	1188	12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe	83
PID 4876 wrote to memory of 1396	4876	ambiparous.exe	85
PID 4876 wrote to memory of 1396	4876	ambiparous.exe	85
PID 4876 wrote to memory of 1396	4876	ambiparous.exe	85
PID 4876 wrote to memory of 1396	4876	ambiparous.exe	85
PID 1396 wrote to memory of 1372	1396	svchost.exe	88
PID 1396 wrote to memory of 1372	1396	svchost.exe	88
PID 1396 wrote to memory of 1372	1396	svchost.exe	88
PID 1396 wrote to memory of 1372	1396	svchost.exe	88

C:\Users\Admin\AppData\Local\Temp\12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe
"C:\Users\Admin\AppData\Local\Temp\12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Users\Admin\AppData\Local\lecheries\ambiparous.exe
  "C:\Users\Admin\AppData\Local\Temp\12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.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:4876
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1396
  - - \??\c:\program files (x86)\internet explorer\iexplore.exe
      "c:\program files (x86)\internet explorer\iexplore.exe"
      4⤵
      PID:1372
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 664
    3⤵
    - Program crash
    PID:3636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4876 -ip 4876
1⤵
PID:512

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\lecheries\ambiparous.exe

Filesize
1.3MB

MD5
f484f16874ddb071b45cb9f1fa8d0c56

SHA1
8cf9f6ab9a0a8520650145ae1702cc35f0e4b123

SHA256
12f38b57f20acea350ed883756309c9516c6b5b814ebedcb19dcb5ba798579e1

SHA512
a20a46f56d408e9b2b5dcf956c9dec9a1170885fbbcb7c24a8caa6ed7202c30309bc72dc7a4c193ddb6f13cdc4c94e5f105e6d76cdff5b1d0585c7d807318e15

Download Submit
memory/1188-6-0x0000000001620000-0x0000000001A20000-memory.dmp

Filesize
4.0MB

Download
memory/1372-24-0x00000000007C0000-0x00000000007CE000-memory.dmp

Filesize
56KB

Download
memory/1372-28-0x00000000007C0000-0x00000000007CE000-memory.dmp

Filesize
56KB

Download
memory/1372-30-0x00000000007C0000-0x00000000007CE000-memory.dmp

Filesize
56KB

Download
memory/1372-29-0x00000000007C0000-0x00000000007CE000-memory.dmp

Filesize
56KB

Download
memory/1372-26-0x00000000007C0000-0x00000000007CE000-memory.dmp

Filesize
56KB

Download
memory/1396-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1396-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1396-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1396-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1396-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4876-18-0x0000000000BC0000-0x0000000000FC0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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