remcos | 3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-10-2024 20:31

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General

Target

3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe
Size

1.6MB
MD5

6b737ec9c99212f82ad21f718d102c07
SHA1

073666a7026034ab313e573b19f8b32abb85979c
SHA256

3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591
SHA512

6d9f2e9f344544e46ff56317c3a0abf4b6ef88f0af7792ad053ae77e3915192f26c2d7b64aced249d84191fc0dd01ba2fd0edb987ff5d195d63e43ef260f47a4
SSDEEP

24576:FfmMv6Ckr7Mny5QlxdojKM41UJ2FdS/JWhtT2NDH2/fqcLPDMplL3T3W:F3v+7/5Qlxd7WaYchN2QfqcTDMXTm

Score

10^/10

remcos remotehost collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

45.95.169.124:2404

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-EWMBFF
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

Detected Nirsoft tools 7 IoCs

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

resource	yara_rule
behavioral1/memory/2784-34-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2760-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2784-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2760-31-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2692-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2784-43-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2760-45-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2760-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2760-31-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2760-45-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2784-34-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2784-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2784-43-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2528 set thread context of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2160 set thread context of 2784	2160	svchost.exe	32
PID 2160 set thread context of 2760	2160	svchost.exe	33
PID 2160 set thread context of 2692	2160	svchost.exe	34

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2784	svchost.exe
2784	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe
2160	svchost.exe
2160	svchost.exe
2160	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2528 wrote to memory of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2528 wrote to memory of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2528 wrote to memory of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2528 wrote to memory of 2160	2528	3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe	31
PID 2160 wrote to memory of 2784	2160	svchost.exe	32
PID 2160 wrote to memory of 2784	2160	svchost.exe	32
PID 2160 wrote to memory of 2784	2160	svchost.exe	32
PID 2160 wrote to memory of 2784	2160	svchost.exe	32
PID 2160 wrote to memory of 2784	2160	svchost.exe	32
PID 2160 wrote to memory of 2760	2160	svchost.exe	33
PID 2160 wrote to memory of 2760	2160	svchost.exe	33
PID 2160 wrote to memory of 2760	2160	svchost.exe	33
PID 2160 wrote to memory of 2760	2160	svchost.exe	33
PID 2160 wrote to memory of 2760	2160	svchost.exe	33
PID 2160 wrote to memory of 2692	2160	svchost.exe	34
PID 2160 wrote to memory of 2692	2160	svchost.exe	34
PID 2160 wrote to memory of 2692	2160	svchost.exe	34
PID 2160 wrote to memory of 2692	2160	svchost.exe	34
PID 2160 wrote to memory of 2692	2160	svchost.exe	34

C:\Users\Admin\AppData\Local\Temp\3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe
"C:\Users\Admin\AppData\Local\Temp\3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\3b8887359ad82101a2e050475601c339ae2fab0676712f7dded280e7d52b9591.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2160
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ghvkeilxmmazvjlryhlyd"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2784
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\rjicfavzzusmxpzvpryaoqma"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2760
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\bdnngtgtnckqhvvzzcsbrdhrrehv"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2160-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2160-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2160-50-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2160-46-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2160-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2528-2-0x0000000003FE0000-0x00000000043E0000-memory.dmp

Filesize
4.0MB

Download
memory/2692-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2692-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2692-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2692-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2760-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2760-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2760-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2760-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2760-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2784-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2784-23-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2784-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2784-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2784-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download