remcos | 42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20

General

Target

42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe
Size

1.6MB
MD5

ce5790a8c9abff9f6e605373f64cb9d6
SHA1

38952bb5ce924019cec324793cc4d3c8307af4fa
SHA256

42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20
SHA512

7d1cbbdcc179f52faa6513571f9ccaf622655f1560d24902508b03d04a9f2fa3446d5bb7f4a1b9cc46944778c0b9c17630ea7061206d2d0e0da92cc13acc16b6
SSDEEP

24576:ffmMv6Ckr7Mny5QLh+v0UP7Gm7AIwc/8/fOGu7vJM57icn08nmpMBwHACDEp:f3v+7/5QLhtUP7JkItw0Tq10iKHxW

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

www.projectusf.com:2404

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
gfh
mouse_option
false
mutex
Rmc-J91LMC
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\PO.vbs	PO.exe

Executes dropped EXE 2 IoCs

pid	Process
1812	PO.exe
3948	PO.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000d000000023aae-5.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3948 set thread context of 2248	3948	PO.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1812	PO.exe
3948	PO.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2248	svchost.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 1812	3968	42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe	87
PID 3968 wrote to memory of 1812	3968	42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe	87
PID 3968 wrote to memory of 1812	3968	42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe	87
PID 1812 wrote to memory of 4832	1812	PO.exe	89
PID 1812 wrote to memory of 4832	1812	PO.exe	89
PID 1812 wrote to memory of 4832	1812	PO.exe	89
PID 1812 wrote to memory of 3948	1812	PO.exe	90
PID 1812 wrote to memory of 3948	1812	PO.exe	90
PID 1812 wrote to memory of 3948	1812	PO.exe	90
PID 3948 wrote to memory of 2248	3948	PO.exe	91
PID 3948 wrote to memory of 2248	3948	PO.exe	91
PID 3948 wrote to memory of 2248	3948	PO.exe	91
PID 3948 wrote to memory of 2248	3948	PO.exe	91

C:\Users\Admin\AppData\Local\Temp\42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe
"C:\Users\Admin\AppData\Local\Temp\42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\directory\PO.exe
  "C:\Users\Admin\AppData\Local\Temp\42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1812
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20.exe"
    3⤵
    PID:4832
- - C:\Users\Admin\AppData\Local\directory\PO.exe
    "C:\Users\Admin\AppData\Local\directory\PO.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\directory\PO.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

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\gfh\logs.dat

Filesize
144B

MD5
78c98cafb170ac5ce7b97170169f80aa

SHA1
1c749763f25da51607da25308f0d72133952b6f1

SHA256
70adc2cbee7e88a6e1357d55d8a17301400578940dc9396112b5d6e95867e0f1

SHA512
6315197452c5eb92e51693fd3f25faef6840480275482d183d391c62cb808f03f098c08d3f995888c04950f8a10ec73b3c9b0ff2fbb88fad51bbbd4a4118d8cd

Download Submit
C:\Users\Admin\AppData\Local\directory\PO.exe

Filesize
1.6MB

MD5
ce5790a8c9abff9f6e605373f64cb9d6

SHA1
38952bb5ce924019cec324793cc4d3c8307af4fa

SHA256
42935d2557a1d94823d32a2d9e6017a33f961b9e672292beed123d4b41c81c20

SHA512
7d1cbbdcc179f52faa6513571f9ccaf622655f1560d24902508b03d04a9f2fa3446d5bb7f4a1b9cc46944778c0b9c17630ea7061206d2d0e0da92cc13acc16b6

Download Submit
memory/1812-10-0x00000000040E0000-0x00000000044E0000-memory.dmp

Filesize
4.0MB

Download
memory/2248-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2248-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3948-16-0x00000000040D0000-0x00000000044D0000-memory.dmp

Filesize
4.0MB

Download
memory/3968-2-0x00000000046A0000-0x0000000004AA0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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