remcos | 746e4e3a4afb2fb0e41287357a561eb9549a719607c0f7b3743314a08d3cac17

General

Target

SWA710932Y5V01.exe
Size

1.6MB
MD5

6b19d06c2770fce41f9af1703b6ac62c
SHA1

23bd88644bfe0167ca5a7fbfaec93c5f4e9b62c7
SHA256

746e4e3a4afb2fb0e41287357a561eb9549a719607c0f7b3743314a08d3cac17
SHA512

12d7c5c17e9677b00661f8dc936e8116851a9c4690498e9c16d44dc759c9ae1d08623ffbb505d78a3f5c6e1813129d5e5aab282d106798c0fc6f91058719c57f
SSDEEP

24576:ffmMv6Ckr7Mny5QLqtPq6hwpzjTNA5Mkj4Aaeav2Wv8LZ73YRka2pQiJTvovqx7L:f3v+7/5QL/HTuekj4Zeav2zyOQYtW2DB

Score

10^/10

remcos maharaba discovery rat

Malware Config

Extracted

Family

remcos

Botnet

MAHARABA

C2

64.188.20.210:3800

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-W8QVO9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
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\name.vbs	name.exe

Executes dropped EXE 1 IoCs

pid	Process
1640	name.exe

Loads dropped DLL 1 IoCs

pid	Process
2540	SWA710932Y5V01.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0007000000018f80-4.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1640 set thread context of 2364	1640	name.exe	31

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	SWA710932Y5V01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1640	name.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 1640	2540	SWA710932Y5V01.exe	30
PID 2540 wrote to memory of 1640	2540	SWA710932Y5V01.exe	30
PID 2540 wrote to memory of 1640	2540	SWA710932Y5V01.exe	30
PID 2540 wrote to memory of 1640	2540	SWA710932Y5V01.exe	30
PID 1640 wrote to memory of 2364	1640	name.exe	31
PID 1640 wrote to memory of 2364	1640	name.exe	31
PID 1640 wrote to memory of 2364	1640	name.exe	31
PID 1640 wrote to memory of 2364	1640	name.exe	31
PID 1640 wrote to memory of 2364	1640	name.exe	31

C:\Users\Admin\AppData\Local\Temp\SWA710932Y5V01.exe
"C:\Users\Admin\AppData\Local\Temp\SWA710932Y5V01.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\directory\name.exe
  "C:\Users\Admin\AppData\Local\Temp\SWA710932Y5V01.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:1640
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\SWA710932Y5V01.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2364

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:\Users\Admin\AppData\Local\Temp\Mazatl

Filesize
469KB

MD5
741bfc48cb361c3b81e1073da7c5ab56

SHA1
c418a8b87c8be4402f75b3942296493c2a845fac

SHA256
b3182f45847383eb05210831cd81a7eced78f36cf36c4d10538d892ecea48488

SHA512
8b780b990f6c1619f571899c02c039921aa823807599dd12db4680508ae56413f371c810899371d530a7c6d561e716d32ac1c007b64fa6edf8be91271732d8f0

Download Submit
\Users\Admin\AppData\Local\directory\name.exe

Filesize
1.6MB

MD5
6b19d06c2770fce41f9af1703b6ac62c

SHA1
23bd88644bfe0167ca5a7fbfaec93c5f4e9b62c7

SHA256
746e4e3a4afb2fb0e41287357a561eb9549a719607c0f7b3743314a08d3cac17

SHA512
12d7c5c17e9677b00661f8dc936e8116851a9c4690498e9c16d44dc759c9ae1d08623ffbb505d78a3f5c6e1813129d5e5aab282d106798c0fc6f91058719c57f

Download Submit
memory/1640-12-0x0000000003B50000-0x0000000003F50000-memory.dmp

Filesize
4.0MB

Download
memory/2364-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2364-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2540-2-0x0000000003B60000-0x0000000003F60000-memory.dmp

Filesize
4.0MB

Download

Analysis

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