remcos | a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-09-2024 05:32

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General

Target

a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
Size

903KB
MD5

51f72049f9a159ebe2d0703fa2e9e898
SHA1

8c85bdf7ceff32613cf219da176808ad8a8a8b99
SHA256

a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce
SHA512

fb690d21a2a4a7167c9cf6932a20772db4431bff831e9aafbf502913cd84523f99a002a6ae88383d2cfe6b80e89242ebf8448b1ef563bfce322edb0afc42e168
SSDEEP

24576:RUN2k1xt4uIDiHiNan2k95YYzBQak2P44b3i64I+xrST9i:RU8MfI8uan2kPTz7p9b5VTk

Score

10^/10

remcos rhymer discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

Rhymer

64.188.12.208:5500

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-WW3VS5
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1400	powershell.exe
624	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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4752 set thread context of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99

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 5 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
1844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
1400	powershell.exe
624	powershell.exe
624	powershell.exe
4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
1400	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
Token: SeDebugPrivilege	1400	powershell.exe
Token: SeDebugPrivilege	624	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 1400	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	93
PID 4752 wrote to memory of 1400	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	93
PID 4752 wrote to memory of 1400	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	93
PID 4752 wrote to memory of 624	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	95
PID 4752 wrote to memory of 624	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	95
PID 4752 wrote to memory of 624	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	95
PID 4752 wrote to memory of 1844	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	97
PID 4752 wrote to memory of 1844	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	97
PID 4752 wrote to memory of 1844	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	97
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99
PID 4752 wrote to memory of 3564	4752	a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe	99

C:\Users\Admin\AppData\Local\Temp\a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
"C:\Users\Admin\AppData\Local\Temp\a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.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:4752
- 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\a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1400
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BAjeeg.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:624
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BAjeeg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp844E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1844
- C:\Users\Admin\AppData\Local\Temp\a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe
  "C:\Users\Admin\AppData\Local\Temp\a3b8b22001bd2cdb7235143b52225c2063d33b63a87e44cba0dae647c49be7ce.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3564

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
8b1706b2a9087a0d14f555b0aecc8739

SHA1
dd1ee7ae127cf68343ccdba2017e2dbe3269721d

SHA256
2511f97203c5e6bd5f977ac24dd2c6eabd68f142c936d46066bd43ad355210a7

SHA512
9a0b8d197d1ef2109c413843571a1d46c961e323ce6c086b4eb4ed3fe42db7f5f8b5fbd823b0a7f301109c409204eb8c35a77f96e75d1c4218422fb87f547d9e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zrdyfmbm.bjn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp844E.tmp

Filesize
1KB

MD5
e6ab084757e4a23f7266927580ab86c8

SHA1
835e94747ecbb89d150ddf11cc59b6287bf66a59

SHA256
92556abc7d7c0dcf0e0def4586481d2f579a5645d3a3515d953cd7a2a719376b

SHA512
63d7a351ecd837fdd4232c13c237c18042bdb199832f52b26debaef624098404885707127b67552c1b43bf5b414a13bea0564a0c5529139d64a028b17fe69030

Download Submit
memory/624-84-0x0000000007300000-0x000000000730A000-memory.dmp

Filesize
40KB

Download
memory/624-88-0x00000000074D0000-0x00000000074E4000-memory.dmp

Filesize
80KB

Download
memory/624-20-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/624-80-0x0000000006530000-0x000000000654E000-memory.dmp

Filesize
120KB

Download
memory/624-60-0x0000000074F10000-0x0000000074F5C000-memory.dmp

Filesize
304KB

Download
memory/624-53-0x0000000006000000-0x000000000604C000-memory.dmp

Filesize
304KB

Download
memory/624-52-0x0000000005F60000-0x0000000005F7E000-memory.dmp

Filesize
120KB

Download
memory/624-43-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/624-89-0x00000000075D0000-0x00000000075EA000-memory.dmp

Filesize
104KB

Download
memory/624-98-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1400-82-0x0000000007620000-0x0000000007C9A000-memory.dmp

Filesize
6.5MB

Download
memory/1400-61-0x0000000074F10000-0x0000000074F5C000-memory.dmp

Filesize
304KB

Download
memory/1400-18-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1400-17-0x0000000004E60000-0x0000000005488000-memory.dmp

Filesize
6.2MB

Download
memory/1400-24-0x0000000005660000-0x00000000056C6000-memory.dmp

Filesize
408KB

Download
memory/1400-23-0x0000000005540000-0x00000000055A6000-memory.dmp

Filesize
408KB

Download
memory/1400-16-0x00000000023A0000-0x00000000023D6000-memory.dmp

Filesize
216KB

Download
memory/1400-22-0x0000000004CD0000-0x0000000004CF2000-memory.dmp

Filesize
136KB

Download
memory/1400-45-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1400-44-0x00000000056D0000-0x0000000005A24000-memory.dmp

Filesize
3.3MB

Download
memory/1400-86-0x00000000071D0000-0x00000000071E1000-memory.dmp

Filesize
68KB

Download
memory/1400-85-0x0000000007250000-0x00000000072E6000-memory.dmp

Filesize
600KB

Download
memory/1400-90-0x00000000072F0000-0x00000000072F8000-memory.dmp

Filesize
32KB

Download
memory/1400-83-0x0000000006FD0000-0x0000000006FEA000-memory.dmp

Filesize
104KB

Download
memory/1400-97-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1400-81-0x0000000006E80000-0x0000000006F23000-memory.dmp

Filesize
652KB

Download
memory/1400-59-0x0000000006E30000-0x0000000006E62000-memory.dmp

Filesize
200KB

Download
memory/1400-19-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1400-87-0x0000000007200000-0x000000000720E000-memory.dmp

Filesize
56KB

Download
memory/3564-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3564-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4752-8-0x000000007466E000-0x000000007466F000-memory.dmp

Filesize
4KB

Download
memory/4752-5-0x0000000005550000-0x000000000555A000-memory.dmp

Filesize
40KB

Download
memory/4752-4-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/4752-6-0x0000000006EB0000-0x0000000006F86000-memory.dmp

Filesize
856KB

Download
memory/4752-3-0x0000000005580000-0x0000000005612000-memory.dmp

Filesize
584KB

Download
memory/4752-2-0x0000000005A90000-0x0000000006034000-memory.dmp

Filesize
5.6MB

Download
memory/4752-1-0x0000000000A80000-0x0000000000B66000-memory.dmp

Filesize
920KB

Download
memory/4752-0-0x000000007466E000-0x000000007466F000-memory.dmp

Filesize
4KB

Download
memory/4752-7-0x0000000005A80000-0x0000000005A8E000-memory.dmp

Filesize
56KB

Download
memory/4752-9-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/4752-10-0x0000000007430000-0x00000000074F0000-memory.dmp

Filesize
768KB

Download
memory/4752-51-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/4752-11-0x0000000009A90000-0x0000000009B2C000-memory.dmp

Filesize
624KB

Download