remcos | caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a

General

Target

caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
Size

482KB
MD5

d82f58136dcb77606b7298c80818fbf8
SHA1

a1a75c2416da3bf3294e1953c88037a0eb551beb
SHA256

caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a
SHA512

d845e38e727c2990e3a9a33ee1e97ed7c677c601f03a68aabe70c997983e3187932a5b6a3f5c335f69230b06701a9f8ec1ec40d39c5ce5e895750f3bb29522a8
SSDEEP

6144:KTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrS4T4:KTlrYw1RUh3NFn+N5WfIQIjbs/ZBkT4

Score

10^/10

remcos akpu idemili collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Akpu idemili

C2

closen.kozow.com: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-3WVVD0
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/2116-8-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5104-9-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2116-14-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5104-10-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4248-24-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4248-21-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2116-26-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5104-9-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/5104-10-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2116-8-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2116-14-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2116-26-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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-1-5-21-2412658365-3084825385-3340777666-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 2116	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	89
PID 2892 set thread context of 5104	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	90
PID 2892 set thread context of 4248	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	91

System Location Discovery: System Language Discovery 1 TTPs 4 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	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2116	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
2116	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
4248	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
4248	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
2116	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
2116	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4248	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2116	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	89
PID 2892 wrote to memory of 2116	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	89
PID 2892 wrote to memory of 2116	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	89
PID 2892 wrote to memory of 5104	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	90
PID 2892 wrote to memory of 5104	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	90
PID 2892 wrote to memory of 5104	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	90
PID 2892 wrote to memory of 4248	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	91
PID 2892 wrote to memory of 4248	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	91
PID 2892 wrote to memory of 4248	2892	caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe	91

C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
"C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
  C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe /stext "C:\Users\Admin\AppData\Local\Temp\hyzlkvuuxbhjidvb"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2116
- C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
  C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe /stext "C:\Users\Admin\AppData\Local\Temp\ktmwlnnnljznsrrffair"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:5104
- C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe
  C:\Users\Admin\AppData\Local\Temp\caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a.exe /stext "C:\Users\Admin\AppData\Local\Temp\unroeyxpzrrsvxfjokcsogk"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4248

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
bf9b871700dd0928910e2b73c254c084

SHA1
1d409404f0463015c41fa4b3993d206db9af082f

SHA256
cd85e312d0ce8092346793af3c4d076e804400cd46924a11d9a36a8e043a3348

SHA512
8635851ff87f094317c2ca0879c38c86d09ad85b572c61b84b0eeb7a0a6f61673edd830adbb879ca448fe8475a4b596c02185bc7078b5474a7a475ee31109a6f

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

Filesize
4KB

MD5
c0ab2847671ed5375328c5127a02cc72

SHA1
dc2bcb51562fb17e5c8787833bc0181d88a5b75e

SHA256
e961f466a0638bc99182d0056245e2d8bf1ccc13a189b802aada981f379e2384

SHA512
0b8b634d21ac71e02cef86687bf84b6fcecfd24dafab8130f42ce8b4b3f308a2e1b1fa7bf8d37f2eda76efae2b30b8d39f41d808d771562d8545ed144241924f

Download Submit
memory/2116-14-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2116-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2116-8-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2116-3-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2116-4-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2892-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2892-32-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2892-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2892-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2892-29-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4248-15-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4248-21-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4248-24-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4248-20-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4248-22-0x0000000000430000-0x00000000004F9000-memory.dmp

Filesize
804KB

Download
memory/4248-19-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5104-5-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5104-7-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5104-10-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5104-9-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

Analysis

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