remcos | 27b9c2bbe7d1d9a042707f2dffed11fec9f2bb9804a5255d02c68b5b975d071a

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-11-2024 02:11

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General

Target

Ryzen DRAM Calculator 1.7.3/Ryzen DRAM Calculator 1.7.3.exe
Size

3.0MB
MD5

9d88a0aa3f2b647fd6ced2f6cc7bf95e
SHA1

03ee53577b16217f045832d6f4c346600df29915
SHA256

0661814be3524d220818a4342f3949ae94ef8b005da3e10605ab9486c94170b3
SHA512

e8df6641bd830529a29b45e5030eb5e0cbe870254c16e2ccf0dd3b3af32f3234c80cbe8b403d2d32fb0a01218ff2011a0fa5157eb92bfda3d2bc307a362d8fff
SSDEEP

49152:ZEA9P+bz2cHPcUb6HSb4SOEMkBeH7nQckO6bAGx7jXTVd3338u:t92bz2Eb6pd7B6bAGx7n333J

Score

10^/10

remcos new discovery rat

Malware Config

Extracted

Family

remcos

Botnet

New

95.217.148.142:9004

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
SSS1ooosSAweewwe-X6B4E4
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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	Ryzen DRAM Calculator 1.7.3.exe

Executes dropped EXE 3 IoCs

pid	Process
1768	Ryzen DRAM Calculator 1.7.3.exe
5052	scr_previw.exe
2676	scr_previw.exe

Loads dropped DLL 2 IoCs

pid	Process
5052	scr_previw.exe
2676	scr_previw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2676 set thread context of 4164	2676	scr_previw.exe	96

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 6 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	Ryzen DRAM Calculator 1.7.3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Ryzen DRAM Calculator 1.7.3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scr_previw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scr_previw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4124	Ryzen DRAM Calculator 1.7.3.exe
4124	Ryzen DRAM Calculator 1.7.3.exe
5052	scr_previw.exe
2676	scr_previw.exe
2676	scr_previw.exe
4164	cmd.exe
4164	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2676	scr_previw.exe
4164	cmd.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4124	Ryzen DRAM Calculator 1.7.3.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 4124	4520	Ryzen DRAM Calculator 1.7.3.exe	86
PID 4520 wrote to memory of 4124	4520	Ryzen DRAM Calculator 1.7.3.exe	86
PID 4520 wrote to memory of 4124	4520	Ryzen DRAM Calculator 1.7.3.exe	86
PID 4124 wrote to memory of 1768	4124	Ryzen DRAM Calculator 1.7.3.exe	87
PID 4124 wrote to memory of 1768	4124	Ryzen DRAM Calculator 1.7.3.exe	87
PID 4124 wrote to memory of 5052	4124	Ryzen DRAM Calculator 1.7.3.exe	88
PID 4124 wrote to memory of 5052	4124	Ryzen DRAM Calculator 1.7.3.exe	88
PID 4124 wrote to memory of 5052	4124	Ryzen DRAM Calculator 1.7.3.exe	88
PID 5052 wrote to memory of 2676	5052	scr_previw.exe	92
PID 5052 wrote to memory of 2676	5052	scr_previw.exe	92
PID 5052 wrote to memory of 2676	5052	scr_previw.exe	92
PID 2676 wrote to memory of 4164	2676	scr_previw.exe	96
PID 2676 wrote to memory of 4164	2676	scr_previw.exe	96
PID 2676 wrote to memory of 4164	2676	scr_previw.exe	96
PID 2676 wrote to memory of 4164	2676	scr_previw.exe	96
PID 4164 wrote to memory of 4796	4164	cmd.exe	111
PID 4164 wrote to memory of 4796	4164	cmd.exe	111
PID 4164 wrote to memory of 4796	4164	cmd.exe	111
PID 4164 wrote to memory of 4796	4164	cmd.exe	111
PID 4164 wrote to memory of 4796	4164	cmd.exe	111

C:\Users\Admin\AppData\Local\Temp\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe
"C:\Users\Admin\AppData\Local\Temp\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Users\Admin\AppData\Local\Temp\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe
  "C:\Users\Admin\AppData\Local\Temp\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe" /VERYSILENT
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4124
- - C:\Users\Admin\AppData\Roaming\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe
    "C:\Users\Admin\AppData\Roaming\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe"
    3⤵
    - Executes dropped EXE
    PID:1768
- - C:\Users\Admin\AppData\Roaming\scr_previw.exe
    "C:\Users\Admin\AppData\Roaming\scr_previw.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:5052
  - - C:\Users\Admin\AppData\Roaming\Browserload\scr_previw.exe
      C:\Users\Admin\AppData\Roaming\Browserload\scr_previw.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2676
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\SysWOW64\cmd.exe
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:4164
      - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\5743a78b

Filesize
1.2MB

MD5
ccb3a5aef02508568db0b078d7a19be9

SHA1
72809d65eff36b0f57388161f799424c407d8f6e

SHA256
b34cae2198473f45582a5f271820d98c03c72074ff94a3fb1209f7f69b3f71c0

SHA512
ee93d8ce89f8135ce86e90b695b65f4bfc1ab71a1245ee472e9ffc3aa626d394935fa6b7c0870c1765cbf9b6922feef2d61c2766b97cf1a5b9741abf5638e7ae

Download Submit
C:\Users\Admin\AppData\Roaming\Ryzen DRAM Calculator 1.7.3\Ryzen DRAM Calculator 1.7.3.exe

Filesize
1.0MB

MD5
782db962173b5a744fdadcbbed8a6730

SHA1
49ec2b0443801cad7b4664f3887654a010c53392

SHA256
18d88f4214a2e62640719f1a5377c5f222721c97aa4ea2dec1526b09df211eeb

SHA512
8cebe2557a8847ad2084a9466210e9f931a14a2e75f73c30424e4a69936c628cdc41ac7493799662d2765225645ddc2f3d685f3aca48227b746eb6178beb10cf

Download Submit
C:\Users\Admin\AppData\Roaming\cygrt

Filesize
947KB

MD5
a727c368e3a6c273f28c80607f2df861

SHA1
a31a2b4a4677d58bf9f7126da6dedaf4502eb283

SHA256
bc5e2a7118a6e0a37b968dca2c110dd9db9a4359f6aea13f41ac04c663d066ca

SHA512
b7a47943727fced7da83f89d8eac50a50308a8a7abacf57b7ffcc0b2c05349360a8af60f3ab81755ba456b956b022c99f21692d339d399a42a5b8d9860b9045d

Download Submit
C:\Users\Admin\AppData\Roaming\d3dx9_43.dll

Filesize
1.9MB

MD5
e8ad346c114fda96fca288966eae8e92

SHA1
fdfad7f2030b54f076b2a2e24ef1199abf2588e6

SHA256
7e04681fdc438855e5b27a92c73b74ccb0a13338ee24a5054571b8efd8918ba0

SHA512
d63e542de66eb09d6847ed99e173763b7c24335566f650bdb198d4279b0de6e14cb4a03f29c66b5d7d6c480a6f520f677fccf8cbf51dc5db3f8af6c5412d7549

Download Submit
C:\Users\Admin\AppData\Roaming\gbxchd

Filesize
15KB

MD5
162ba47ec20e7fb580672579a6fef9d2

SHA1
a6b52b8f549ca44ffe821f65e846b869da544c28

SHA256
227baa93552cc95a5d2142c23c27f2006e41093cfe24f89bea1b8fe8abbac159

SHA512
135e057a779e5ed593f455ecc646dbf0f21b0bab909e0d8c3d83c7817e82e52115551cd6710b75dbfb9026393861e6f24f63ec59722d1e73553df97ac0e55cd4

Download Submit
C:\Users\Admin\AppData\Roaming\scr_previw.exe

Filesize
2.2MB

MD5
d9530ecee42acccfd3871672a511bc9e

SHA1
89b4d2406f1294bd699ef231a4def5f495f12778

SHA256
81e04f9a131534acc0e9de08718c062d3d74c80c7f168ec7e699cd4b2bd0f280

SHA512
d5f048ea995affdf9893ec4c5ac5eb188b6714f5b6712e0b5a316702033421b145b8ee6a62d303eb4576bf8f57273ff35c5d675807563a31157136f79d8a9980

Download Submit
memory/1768-52-0x000001C34BB70000-0x000001C34BC7E000-memory.dmp

Filesize
1.1MB

Download
memory/1768-46-0x00007FFC7B143000-0x00007FFC7B145000-memory.dmp

Filesize
8KB

Download
memory/2676-68-0x0000000074120000-0x000000007429B000-memory.dmp

Filesize
1.5MB

Download
memory/2676-69-0x00007FFC99CB0000-0x00007FFC99EA5000-memory.dmp

Filesize
2.0MB

Download
memory/2676-70-0x0000000074120000-0x000000007429B000-memory.dmp

Filesize
1.5MB

Download
memory/4124-4-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

Filesize
4KB

Download
memory/4124-51-0x0000000000400000-0x000000000070A000-memory.dmp

Filesize
3.0MB

Download
memory/4164-73-0x00007FFC99CB0000-0x00007FFC99EA5000-memory.dmp

Filesize
2.0MB

Download
memory/4164-75-0x0000000074120000-0x000000007429B000-memory.dmp

Filesize
1.5MB

Download
memory/4520-0-0x0000000002710000-0x0000000002711000-memory.dmp

Filesize
4KB

Download
memory/4520-3-0x0000000000400000-0x000000000070A000-memory.dmp

Filesize
3.0MB

Download
memory/4796-77-0x00007FFC99CB0000-0x00007FFC99EA5000-memory.dmp

Filesize
2.0MB

Download
memory/4796-83-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-90-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-78-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-80-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-81-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-82-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-89-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-84-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-85-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-86-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-87-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4796-88-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/5052-56-0x00007FFC99CB0000-0x00007FFC99EA5000-memory.dmp

Filesize
2.0MB

Download
memory/5052-55-0x0000000074C20000-0x0000000074D9B000-memory.dmp

Filesize
1.5MB

Download