remcos | b57787dd269633555ab9192e532a3f52cbfe6c6ce55bd84c2565e8597de164a4

Analysis

max time kernel
120s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19-03-2024 15:18

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General

Target

TS-240319-UF3.exe
Size

899KB
MD5

a9aa529393ea3da12356286b4fb1b5f0
SHA1

1effa2a6a85a77290d9981b7d90916960a440b56
SHA256

b57787dd269633555ab9192e532a3f52cbfe6c6ce55bd84c2565e8597de164a4
SHA512

d013c0f91ddd225c01efdb06098c92c4adf788f377c4e21d3d705db068adcb86edf34abc9d5b05505ab69c008c39b021c09e8f6fd3f0ef50a3ec34b4ae0e5654
SSDEEP

24576:aOjHdj0AM1skyrTSM92adO1NBca/juSFD0GW0R:aOJP7kyr2M9E1ncQu+D0GWy

Score

10^/10

remcos remotehost collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

64.188.22.11:2404

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
remcos
mouse_option
false
mutex
Rmc-10FYXY
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

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/5100-89-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral2/memory/5100-95-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/4956-88-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4956-98-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5100-89-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/5100-95-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/3036-94-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4956-88-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3036-96-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4956-98-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

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

Processes:

TS-240319-UF3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	TS-240319-UF3.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

TS-240319-UF3.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	TS-240319-UF3.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

TS-240319-UF3.exeTS-240319-UF3.exe

description	pid	process	target process
PID 1120 set thread context of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 set thread context of 4956	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 set thread context of 5100	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 set thread context of 3036	1888	TS-240319-UF3.exe	TS-240319-UF3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

4260 schtasks.exe

pid	process
4260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

TS-240319-UF3.exepowershell.exeTS-240319-UF3.exeTS-240319-UF3.exe

pid	process
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
1120	TS-240319-UF3.exe
3560	powershell.exe
3560	powershell.exe
3560	powershell.exe
4956	TS-240319-UF3.exe
4956	TS-240319-UF3.exe
3036	TS-240319-UF3.exe
3036	TS-240319-UF3.exe
4956	TS-240319-UF3.exe
4956	TS-240319-UF3.exe

Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

TS-240319-UF3.exe

pid process

1888 TS-240319-UF3.exe
1888 TS-240319-UF3.exe
1888 TS-240319-UF3.exe

pid	process
1888	TS-240319-UF3.exe
1888	TS-240319-UF3.exe
1888	TS-240319-UF3.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

TS-240319-UF3.exepowershell.exeTS-240319-UF3.exe

description	pid	process
Token: SeDebugPrivilege	1120	TS-240319-UF3.exe
Token: SeDebugPrivilege	3560	powershell.exe
Token: SeDebugPrivilege	3036	TS-240319-UF3.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

TS-240319-UF3.exeTS-240319-UF3.exe

description	pid	process	target process
PID 1120 wrote to memory of 3560	1120	TS-240319-UF3.exe	powershell.exe
PID 1120 wrote to memory of 3560	1120	TS-240319-UF3.exe	powershell.exe
PID 1120 wrote to memory of 3560	1120	TS-240319-UF3.exe	powershell.exe
PID 1120 wrote to memory of 4260	1120	TS-240319-UF3.exe	schtasks.exe
PID 1120 wrote to memory of 4260	1120	TS-240319-UF3.exe	schtasks.exe
PID 1120 wrote to memory of 4260	1120	TS-240319-UF3.exe	schtasks.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1120 wrote to memory of 1888	1120	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 4956	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 4956	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 4956	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 4956	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 5100	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 5100	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 5100	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 5100	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 3036	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 3036	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 3036	1888	TS-240319-UF3.exe	TS-240319-UF3.exe
PID 1888 wrote to memory of 3036	1888	TS-240319-UF3.exe	TS-240319-UF3.exe

C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe
"C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1120

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BkUUEcU.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3560

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BkUUEcU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF898.tmp"
2⤵
- Creates scheduled task(s)
PID:4260

C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe
"C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1888

C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe
C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe /stext "C:\Users\Admin\AppData\Local\Temp\rzdoqdpfwksrdjhzyeqskaaalerjvrz"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:4956

C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe
C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe /stext "C:\Users\Admin\AppData\Local\Temp\btih"
3⤵
- Accesses Microsoft Outlook accounts
PID:5100

C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe
C:\Users\Admin\AppData\Local\Temp\TS-240319-UF3.exe /stext "C:\Users\Admin\AppData\Local\Temp\lwozkok"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1jwgwyo3.lur.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\rzdoqdpfwksrdjhzyeqskaaalerjvrz

Filesize
4KB

MD5
63a3d218b0d233efc9806729feba705a

SHA1
3cda6c59e0b8115d8538c8ff0d94a49294d516ac

SHA256
66ceb453b5931baa8d942d514cc1dcc41a24ab59313c0621daa9920bd0566bfd

SHA512
d0cfb106b57a4e90523c194d073a131bc65461d8e792b0be51aef89aa413dded53c2aba723fc677f68b1211411a0e105b5771cafa045d3e11d54db578577b683

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF898.tmp

Filesize
1KB

MD5
f197063467896a4b1982b135ead5aa43

SHA1
dcfeb5fbf137ba978f5523133ab25ce9abc77bb6

SHA256
ac725436a043ea2675ef82aa8a9a0d3d333276b9f35e72e455959f05b4e94b20

SHA512
22b92657bd22ee9e6bb53900c2fa0d277f2d7143bd2f59af2151f4265c3c392376258fc7af5d904c0de54bb21bc7e46a0f0f1ec1436e5530a52b01fbffa11332

Download Submit
memory/1120-8-0x0000000005120000-0x000000000512C000-memory.dmp

Filesize
48KB

Download
memory/1120-10-0x0000000008560000-0x00000000085FC000-memory.dmp

Filesize
624KB

Download
memory/1120-5-0x0000000004C90000-0x0000000004C9A000-memory.dmp

Filesize
40KB

Download
memory/1120-6-0x00000000050D0000-0x00000000050E4000-memory.dmp

Filesize
80KB

Download
memory/1120-7-0x0000000005110000-0x0000000005118000-memory.dmp

Filesize
32KB

Download
memory/1120-3-0x0000000004AC0000-0x0000000004B52000-memory.dmp

Filesize
584KB

Download
memory/1120-9-0x0000000005D30000-0x0000000005DF0000-memory.dmp

Filesize
768KB

Download
memory/1120-4-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/1120-11-0x0000000074A00000-0x00000000751B0000-memory.dmp

Filesize
7.7MB

Download
memory/1120-12-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

Filesize
64KB

Download
memory/1120-2-0x0000000005130000-0x00000000056D4000-memory.dmp

Filesize
5.6MB

Download
memory/1120-1-0x0000000074A00000-0x00000000751B0000-memory.dmp

Filesize
7.7MB

Download
memory/1120-0-0x0000000000010000-0x00000000000F2000-memory.dmp

Filesize
904KB

Download
memory/1120-40-0x0000000074A00000-0x00000000751B0000-memory.dmp

Filesize
7.7MB

Download
memory/1888-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-106-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-109-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-114-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-108-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-111-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-107-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-112-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-110-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1888-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-105-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1888-104-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1888-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1888-103-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1888-100-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1888-113-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-82-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3036-96-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3036-94-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3036-93-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3560-54-0x0000000075290000-0x00000000752DC000-memory.dmp

Filesize
304KB

Download
memory/3560-46-0x0000000006570000-0x000000000658E000-memory.dmp

Filesize
120KB

Download
memory/3560-70-0x0000000007B20000-0x0000000007BB6000-memory.dmp

Filesize
600KB

Download
memory/3560-71-0x0000000007AA0000-0x0000000007AB1000-memory.dmp

Filesize
68KB

Download
memory/3560-72-0x0000000007AD0000-0x0000000007ADE000-memory.dmp

Filesize
56KB

Download
memory/3560-73-0x0000000007AE0000-0x0000000007AF4000-memory.dmp

Filesize
80KB

Download
memory/3560-74-0x0000000007BE0000-0x0000000007BFA000-memory.dmp

Filesize
104KB

Download
memory/3560-75-0x0000000007BC0000-0x0000000007BC8000-memory.dmp

Filesize
32KB

Download
memory/3560-78-0x0000000074A00000-0x00000000751B0000-memory.dmp

Filesize
7.7MB

Download
memory/3560-17-0x0000000002C70000-0x0000000002CA6000-memory.dmp

Filesize
216KB

Download
memory/3560-68-0x00000000078A0000-0x00000000078BA000-memory.dmp

Filesize
104KB

Download
memory/3560-20-0x0000000002C10000-0x0000000002C20000-memory.dmp

Filesize
64KB

Download
memory/3560-22-0x0000000002C10000-0x0000000002C20000-memory.dmp

Filesize
64KB

Download
memory/3560-21-0x0000000005680000-0x0000000005CA8000-memory.dmp

Filesize
6.2MB

Download
memory/3560-19-0x0000000074A00000-0x00000000751B0000-memory.dmp

Filesize
7.7MB

Download
memory/3560-67-0x0000000007EE0000-0x000000000855A000-memory.dmp

Filesize
6.5MB

Download
memory/3560-25-0x0000000005DE0000-0x0000000005E02000-memory.dmp

Filesize
136KB

Download
memory/3560-66-0x00000000077A0000-0x0000000007843000-memory.dmp

Filesize
652KB

Download
memory/3560-28-0x0000000005E80000-0x0000000005EE6000-memory.dmp

Filesize
408KB

Download
memory/3560-65-0x0000000002C10000-0x0000000002C20000-memory.dmp

Filesize
64KB

Download
memory/3560-39-0x0000000006060000-0x00000000060C6000-memory.dmp

Filesize
408KB

Download
memory/3560-64-0x0000000006B20000-0x0000000006B3E000-memory.dmp

Filesize
120KB

Download
memory/3560-53-0x0000000007560000-0x0000000007592000-memory.dmp

Filesize
200KB

Download
memory/3560-52-0x000000007F2D0000-0x000000007F2E0000-memory.dmp

Filesize
64KB

Download
memory/3560-47-0x00000000065B0000-0x00000000065FC000-memory.dmp

Filesize
304KB

Download
memory/3560-69-0x0000000007910000-0x000000000791A000-memory.dmp

Filesize
40KB

Download
memory/3560-43-0x00000000061F0000-0x0000000006544000-memory.dmp

Filesize
3.3MB

Download
memory/4956-98-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4956-88-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4956-84-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4956-79-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5100-95-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/5100-89-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/5100-87-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/5100-80-0x0000000000400000-0x0000000000457000-memory.dmp

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348KB

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