remcos | 76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad

General

Target

76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe
Size

1.6MB
MD5

19801cf904884fb5e33a7595d6a616c3
SHA1

56792c80985a4ae57d85fdbe7d1f812152c5d2ad
SHA256

76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad
SHA512

f7a37a99f18cdbb35ea03920f305e1bc8a5ada62a7bdc785d30fe85662f7b27a35b592449073ff30a113a6ba6c75d6e54c043e7a61a052a9d5b3f498ca99699f
SSDEEP

24576:ffmMv6Ckr7Mny5QLfrgh8kkKe+rGW/FgkI5NSBJFLM7XV4:f3v+7/5QLfrgh8cFgh+pM7XV4

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

Drops startup file 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2124	holloing.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0007000000023cb4-5.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2124 set thread context of 116	2124	holloing.exe	88

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 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	76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	holloing.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2124	holloing.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
116	svchost.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2124	2028	76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe	87
PID 2028 wrote to memory of 2124	2028	76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe	87
PID 2028 wrote to memory of 2124	2028	76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe	87
PID 2124 wrote to memory of 116	2124	holloing.exe	88
PID 2124 wrote to memory of 116	2124	holloing.exe	88
PID 2124 wrote to memory of 116	2124	holloing.exe	88
PID 2124 wrote to memory of 116	2124	holloing.exe	88

C:\Users\Admin\AppData\Local\Temp\76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe
"C:\Users\Admin\AppData\Local\Temp\76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Users\Admin\AppData\Local\Citlaltpetl\holloing.exe
  "C:\Users\Admin\AppData\Local\Temp\76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:116

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
b72b93c0366feeac7f28fd271331d031

SHA1
ec4f0f42b4f249253d34030df5a4f673c6566d2a

SHA256
2bb35aa605c76ceedcce995b8b639891dbec29aa530a049a8f82dc30ab1b8a33

SHA512
3e7d20d2c1c478669f620cf65c8691e28bbac72e662553345e05a89c7e050d32f313f3a346005852ef2877586b4a0d731a42788e3148670d5cfce5e5c6deac74

Download Submit
C:\Users\Admin\AppData\Local\Citlaltpetl\holloing.exe

Filesize
1.6MB

MD5
19801cf904884fb5e33a7595d6a616c3

SHA1
56792c80985a4ae57d85fdbe7d1f812152c5d2ad

SHA256
76c073734ff5f0942c8c539be408367b83a78ce995e8d9502bea6e9d83d1c3ad

SHA512
f7a37a99f18cdbb35ea03920f305e1bc8a5ada62a7bdc785d30fe85662f7b27a35b592449073ff30a113a6ba6c75d6e54c043e7a61a052a9d5b3f498ca99699f

Download Submit
memory/116-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/116-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2028-2-0x0000000004540000-0x0000000004940000-memory.dmp

Filesize
4.0MB

Download
memory/2124-10-0x00000000040C0000-0x00000000044C0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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