remcos | 9d1f5a0493f3bd4c642b733d8dd79aa80c7666b3e5c856e761d9b894f29e7333

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-12-2024 03:02

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General

Target

Document.exe
Size

715KB
MD5

198ec1f69b5a33f3cc86502a1eed6d3b
SHA1

c8cfb04f36d1d819538f080c7e158987114c2602
SHA256

3ff0c7aa1953da8ec564575b0200453a7a0da774072b12fb1672f38aeef2b770
SHA512

f96160f0e33226737559d6d28d60c1e5fefbd87656f76d0755ddf501935da6ed649b6fffd766ebde84bf6676be055beeb52bd2753235438b00c2528f016add2c
SSDEEP

12288:HcELQF69pTfJghb83Ox3gNQ4z2wrnS6vbP5y0ZdG8T39G/sYEw2Vy:H5fp0l3Pk2J4bo+dpw2

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

RemoteHost

salford1.ddns.net:2404

salford2.ddns.net:2404

salford3.ddns.net:2404

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-56OLZQ
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
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4672	powershell.exe

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	Document.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2588 set thread context of 1352	2588	Document.exe	102

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Document.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2128	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2588	Document.exe
2588	Document.exe
4672	powershell.exe
4672	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	Document.exe
Token: SeDebugPrivilege	4672	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1352	Document.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 4672	2588	Document.exe	99
PID 2588 wrote to memory of 4672	2588	Document.exe	99
PID 2588 wrote to memory of 4672	2588	Document.exe	99
PID 2588 wrote to memory of 2128	2588	Document.exe	101
PID 2588 wrote to memory of 2128	2588	Document.exe	101
PID 2588 wrote to memory of 2128	2588	Document.exe	101
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102
PID 2588 wrote to memory of 1352	2588	Document.exe	102

C:\Users\Admin\AppData\Local\Temp\Document.exe
"C:\Users\Admin\AppData\Local\Temp\Document.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2588
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Document.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4672
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hlzimEOLBqvkW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1BEF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2128
- C:\Users\Admin\AppData\Local\Temp\Document.exe
  "C:\Users\Admin\AppData\Local\Temp\Document.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:1352

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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\__PSScriptPolicyTest_i0lldii0.klq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
148B

MD5
1d649e814de8c34740bbf9ad9115e0ba

SHA1
39cc2c79320141d7bd354a8f1fdf941c44188af3

SHA256
4b2a76ba6c437e2b421a89adefe0874e9c37ad453459b897e2ac33b230f0e53f

SHA512
5ba8e3f2b9db4613c57d9d7c7e27566773bee6b37322d3441e0ca8db306970c774a73282504366002c15ca7834cca9e6270a821c6c9f4bfee7418545ba59e742

Download Submit
memory/1352-16-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-11-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-12-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-10-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-13-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-18-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1352-69-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2588-3-0x00000000751A2000-0x00000000751A3000-memory.dmp

Filesize
4KB

Download
memory/2588-4-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/2588-2-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/2588-1-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/2588-20-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/2588-0-0x00000000751A2000-0x00000000751A3000-memory.dmp

Filesize
4KB

Download
memory/4672-32-0x00000000057C0000-0x0000000005826000-memory.dmp

Filesize
408KB

Download
memory/4672-51-0x00000000063C0000-0x00000000063DE000-memory.dmp

Filesize
120KB

Download
memory/4672-25-0x0000000004E50000-0x0000000004E72000-memory.dmp

Filesize
136KB

Download
memory/4672-26-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/4672-24-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-22-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-37-0x0000000005A30000-0x0000000005D84000-memory.dmp

Filesize
3.3MB

Download
memory/4672-38-0x0000000005E00000-0x0000000005E1E000-memory.dmp

Filesize
120KB

Download
memory/4672-39-0x0000000005E40000-0x0000000005E8C000-memory.dmp

Filesize
304KB

Download
memory/4672-41-0x0000000073780000-0x00000000737CC000-memory.dmp

Filesize
304KB

Download
memory/4672-53-0x0000000007010000-0x00000000070B3000-memory.dmp

Filesize
652KB

Download
memory/4672-54-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-52-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-23-0x0000000004F30000-0x0000000005558000-memory.dmp

Filesize
6.2MB

Download
memory/4672-40-0x0000000006DD0000-0x0000000006E02000-memory.dmp

Filesize
200KB

Download
memory/4672-55-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-56-0x0000000007770000-0x0000000007DEA000-memory.dmp

Filesize
6.5MB

Download
memory/4672-57-0x0000000007130000-0x000000000714A000-memory.dmp

Filesize
104KB

Download
memory/4672-58-0x00000000071A0000-0x00000000071AA000-memory.dmp

Filesize
40KB

Download
memory/4672-59-0x00000000073B0000-0x0000000007446000-memory.dmp

Filesize
600KB

Download
memory/4672-60-0x0000000007330000-0x0000000007341000-memory.dmp

Filesize
68KB

Download
memory/4672-61-0x0000000007360000-0x000000000736E000-memory.dmp

Filesize
56KB

Download
memory/4672-62-0x0000000007370000-0x0000000007384000-memory.dmp

Filesize
80KB

Download
memory/4672-63-0x0000000007470000-0x000000000748A000-memory.dmp

Filesize
104KB

Download
memory/4672-64-0x0000000007450000-0x0000000007458000-memory.dmp

Filesize
32KB

Download
memory/4672-67-0x0000000071DF0000-0x00000000725A0000-memory.dmp

Filesize
7.7MB

Download
memory/4672-21-0x00000000048C0000-0x00000000048F6000-memory.dmp

Filesize
216KB

Download
memory/4672-19-0x0000000071DFE000-0x0000000071DFF000-memory.dmp

Filesize
4KB

Download