remcos | 7f7ec27fa019564213fa1e506b17c451f298c7b6a09ba614a6a92a81bcb2a0f3

General

Target

323397f3967b998c748e0111ec1b6780N.exe
Size

1.2MB
MD5

323397f3967b998c748e0111ec1b6780
SHA1

6bcdff206537eed61e8182bd5a2654b650be9e6f
SHA256

7f7ec27fa019564213fa1e506b17c451f298c7b6a09ba614a6a92a81bcb2a0f3
SHA512

5d221597c633bce724d0da9dc7e30d66672b0c8ad421c7affd32b01265152d3d0b11a33bf73a31dd5cfd11f75a15fa577455cffd1726e764846d66478a484430
SSDEEP

24576:aAHnh+eWsN3skA4RV1Hom2KXMmHagb4KCfAnCdy6K5z5:th+ZkldoPK8Yagb4KMDdMb

Score

10^/10

remcos irken2 collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

irken2

C2

185.150.191.117:4609

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-LBXQ9T
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 7 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/2456-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2932-56-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2104-55-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2932-53-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2456-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2932-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2456-61-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2932-56-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2932-53-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2932-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2456-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2456-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2456-61-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\silvexes.vbs	silvexes.exe

Executes dropped EXE 5 IoCs

pid	Process
2732	silvexes.exe
2456	silvexes.exe
5052	silvexes.exe
2932	silvexes.exe
2104	silvexes.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	silvexes.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000b00000002335c-14.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2732 set thread context of 2456	2732	silvexes.exe	92
PID 2732 set thread context of 2932	2732	silvexes.exe	94
PID 2732 set thread context of 2104	2732	silvexes.exe	95

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	323397f3967b998c748e0111ec1b6780N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	silvexes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	silvexes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	silvexes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	silvexes.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2104	silvexes.exe
2104	silvexes.exe
2456	silvexes.exe
2456	silvexes.exe
2456	silvexes.exe
2456	silvexes.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2732	silvexes.exe
2732	silvexes.exe
2732	silvexes.exe
2732	silvexes.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	silvexes.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1020	323397f3967b998c748e0111ec1b6780N.exe
1020	323397f3967b998c748e0111ec1b6780N.exe
2732	silvexes.exe
2732	silvexes.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1020	323397f3967b998c748e0111ec1b6780N.exe
1020	323397f3967b998c748e0111ec1b6780N.exe
2732	silvexes.exe
2732	silvexes.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1020 wrote to memory of 2732	1020	323397f3967b998c748e0111ec1b6780N.exe	86
PID 1020 wrote to memory of 2732	1020	323397f3967b998c748e0111ec1b6780N.exe	86
PID 1020 wrote to memory of 2732	1020	323397f3967b998c748e0111ec1b6780N.exe	86
PID 2732 wrote to memory of 2456	2732	silvexes.exe	92
PID 2732 wrote to memory of 2456	2732	silvexes.exe	92
PID 2732 wrote to memory of 2456	2732	silvexes.exe	92
PID 2732 wrote to memory of 2456	2732	silvexes.exe	92
PID 2732 wrote to memory of 5052	2732	silvexes.exe	93
PID 2732 wrote to memory of 5052	2732	silvexes.exe	93
PID 2732 wrote to memory of 5052	2732	silvexes.exe	93
PID 2732 wrote to memory of 2932	2732	silvexes.exe	94
PID 2732 wrote to memory of 2932	2732	silvexes.exe	94
PID 2732 wrote to memory of 2932	2732	silvexes.exe	94
PID 2732 wrote to memory of 2932	2732	silvexes.exe	94
PID 2732 wrote to memory of 2104	2732	silvexes.exe	95
PID 2732 wrote to memory of 2104	2732	silvexes.exe	95
PID 2732 wrote to memory of 2104	2732	silvexes.exe	95
PID 2732 wrote to memory of 2104	2732	silvexes.exe	95

C:\Users\Admin\AppData\Local\Temp\323397f3967b998c748e0111ec1b6780N.exe
"C:\Users\Admin\AppData\Local\Temp\323397f3967b998c748e0111ec1b6780N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1020
- C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe
  "C:\Users\Admin\AppData\Local\Temp\323397f3967b998c748e0111ec1b6780N.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe
    C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe /stext "C:\Users\Admin\AppData\Local\Temp\tgcnlcjixyrmnxygpriwbozfyp"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2456
- - C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe
    C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe /stext "C:\Users\Admin\AppData\Local\Temp\ebiymubklgjrxlukzcuyesuohvofk"
    3⤵
    - Executes dropped EXE
    PID:5052
- - C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe
    C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe /stext "C:\Users\Admin\AppData\Local\Temp\ebiymubklgjrxlukzcuyesuohvofk"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2932
- - C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe
    C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe /stext "C:\Users\Admin\AppData\Local\Temp\gdnqnnmdzobwzriwinprpfofqkgolixvs"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Aaberg

Filesize
196KB

MD5
6588c63871313b36d201516ae1c764e8

SHA1
46ffb71844c6227197a56c3e680b9ce9b51689ae

SHA256
f03cb4a116a5b74618c042b0a41f78dab02158387b185f8980c2900bb67f7652

SHA512
fb83bbdb5bfa40aa2514113a387b9b1edf5deceb557693257e428347a8dc59bff23b715604a602e82f0fe30f427e5087d5df3e5092db558f97e17ec7c90f47a6

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

Filesize
4KB

MD5
15e28d82a9ee8a45c10bcf671fef0362

SHA1
2b126b086a1191cb8b4d444e87781358d51af3a4

SHA256
012fbb5f15d52a9560cf0e77fd36837ec2c56aff7a989d31c3d40d4f6df6cf9d

SHA512
3dd749523858a54e7e5ededba47d54715c9d5663dd0bd609363de7442436d1f0e924c5e4706e3ac413b79ddb6a18c796cc0ad166b4c87a3a7a6b009ba77fee82

Download Submit
C:\Users\Admin\AppData\Local\unfatigued\silvexes.exe

Filesize
1.2MB

MD5
323397f3967b998c748e0111ec1b6780

SHA1
6bcdff206537eed61e8182bd5a2654b650be9e6f

SHA256
7f7ec27fa019564213fa1e506b17c451f298c7b6a09ba614a6a92a81bcb2a0f3

SHA512
5d221597c633bce724d0da9dc7e30d66672b0c8ad421c7affd32b01265152d3d0b11a33bf73a31dd5cfd11f75a15fa577455cffd1726e764846d66478a484430

Download Submit
memory/1020-11-0x0000000001970000-0x0000000001974000-memory.dmp

Filesize
16KB

Download
memory/2104-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2104-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2104-54-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2456-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2456-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2456-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2456-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2456-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2732-67-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2732-63-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2732-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-66-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2732-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2732-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2932-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2932-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2932-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2932-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2932-56-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

Analysis

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