remcos | 03541b2cf3bf022eda584b9ead6b6edeb7a47e8ccaa99b2415ee56694c9868cb

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2023, 12:05

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General

Target
21605edd439a91f69b7c2584413ae3f5.exe
Size 2.7MB
Sample230201-n86yssdb23
SHA256 03541b2cf3bf022eda584b9ead6b6edeb7a47e8ccaa99b2415ee56694c9868cb
MD5 21605edd439a91f69b7c2584413ae3f5
SHA1 76353ff45df865cee24b8802c2332c8f07590df6
SHA512 df4248687d7a92389a3aab90dd0ccc8ea7236e8b71555bd835c33816a6e27b9a147d10fe693b57a693698c0d7c3fdbd99a3587cbfba08929c0d0fc4f34efb128
SSDEEP 49152:Q61jlIn2e7zgWTSOa7Q4hVBP35NxVg1DHeTz0CTssEORTdQRYdN+1rHzE42i9:Q6FynB7JTSOWBBNxVg1zen0CLEOhdQTl
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos nigeria collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

nigeria

198.46.173.141:50482
198.46.173.141:50484

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-6CYNGG
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/576-152-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1776-153-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1776-154-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral2/memory/3984-151-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/576-152-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/1776-153-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1776-154-0x0000000000400000-0x0000000000478000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	21605edd439a91f69b7c2584413ae3f5.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
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	21605edd439a91f69b7c2584413ae3f5.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4820 set thread context of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 220 set thread context of 1776	220	21605edd439a91f69b7c2584413ae3f5.exe	91
PID 220 set thread context of 576	220	21605edd439a91f69b7c2584413ae3f5.exe	92
PID 220 set thread context of 3984	220	21605edd439a91f69b7c2584413ae3f5.exe	93

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3988	powershell.exe
3988	powershell.exe
3984	21605edd439a91f69b7c2584413ae3f5.exe
3984	21605edd439a91f69b7c2584413ae3f5.exe
1776	21605edd439a91f69b7c2584413ae3f5.exe
1776	21605edd439a91f69b7c2584413ae3f5.exe
1776	21605edd439a91f69b7c2584413ae3f5.exe
1776	21605edd439a91f69b7c2584413ae3f5.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
220	21605edd439a91f69b7c2584413ae3f5.exe
220	21605edd439a91f69b7c2584413ae3f5.exe
220	21605edd439a91f69b7c2584413ae3f5.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4820	21605edd439a91f69b7c2584413ae3f5.exe
Token: SeDebugPrivilege	3988	powershell.exe
Token: SeDebugPrivilege	3984	21605edd439a91f69b7c2584413ae3f5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
220	21605edd439a91f69b7c2584413ae3f5.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 3988	4820	21605edd439a91f69b7c2584413ae3f5.exe	81
PID 4820 wrote to memory of 3988	4820	21605edd439a91f69b7c2584413ae3f5.exe	81
PID 4820 wrote to memory of 3988	4820	21605edd439a91f69b7c2584413ae3f5.exe	81
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 4820 wrote to memory of 220	4820	21605edd439a91f69b7c2584413ae3f5.exe	89
PID 220 wrote to memory of 1776	220	21605edd439a91f69b7c2584413ae3f5.exe	91
PID 220 wrote to memory of 1776	220	21605edd439a91f69b7c2584413ae3f5.exe	91
PID 220 wrote to memory of 1776	220	21605edd439a91f69b7c2584413ae3f5.exe	91
PID 220 wrote to memory of 1776	220	21605edd439a91f69b7c2584413ae3f5.exe	91
PID 220 wrote to memory of 576	220	21605edd439a91f69b7c2584413ae3f5.exe	92
PID 220 wrote to memory of 576	220	21605edd439a91f69b7c2584413ae3f5.exe	92
PID 220 wrote to memory of 576	220	21605edd439a91f69b7c2584413ae3f5.exe	92
PID 220 wrote to memory of 576	220	21605edd439a91f69b7c2584413ae3f5.exe	92
PID 220 wrote to memory of 3984	220	21605edd439a91f69b7c2584413ae3f5.exe	93
PID 220 wrote to memory of 3984	220	21605edd439a91f69b7c2584413ae3f5.exe	93
PID 220 wrote to memory of 3984	220	21605edd439a91f69b7c2584413ae3f5.exe	93
PID 220 wrote to memory of 3984	220	21605edd439a91f69b7c2584413ae3f5.exe	93

C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
"C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3988
- C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
  C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:220
- - C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
    C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe /stext "C:\Users\Admin\AppData\Local\Temp\nskfrenxjqeiglzzzlmezfeiz"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1776
- - C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
    C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe /stext "C:\Users\Admin\AppData\Local\Temp\xvxpspxyxywnqzvdqvzxkjzzadpx"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:576
- - C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe
    C:\Users\Admin\AppData\Local\Temp\21605edd439a91f69b7c2584413ae3f5.exe /stext "C:\Users\Admin\AppData\Local\Temp\apcishistgoasfjpzgmznwuijkzydqx"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

nskfrenxjqeiglzzzlmezfeiz

Path C:\Users\Admin\AppData\Local\Temp\nskfrenxjqeiglzzzlmezfeiz
Size 4KB
SHA256 bec9bca76621ea0f0db461945ca513d00aba466d4cf882a437a8de82075784f1
MD5 9945b47a62f116c5707cfe39eba4e3a3
SHA1 3a891690b33791216df5ca70ff15c288b8ec3223
SHA512 7c0ba560d4332ca00c6b2e3e938c50e7006b0775ba2eec3ff287adf656de508795be097a6a12d9f3cb9a43ac63c0f52f2574ad1cdebe868fd4ac02e683687e48
SSDEEP 48:wvvv0qxfvvcqxfdvv0qxBvv0qxakvv0q7:mvvxvnp1vvPvvbvv7
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/220-144-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/220-160-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/220-159-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/220-156-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/220-146-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/220-147-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/220-145-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/220-143-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/576-152-0x0000000000400000-0x0000000000457000-memory.dmp

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memory/1776-153-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1776-154-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/3984-151-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3988-141-0x0000000006130000-0x000000000614A000-memory.dmp

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memory/3988-140-0x0000000007310000-0x000000000798A000-memory.dmp

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memory/3988-139-0x0000000005CB0000-0x0000000005CCE000-memory.dmp

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memory/3988-138-0x0000000005690000-0x00000000056F6000-memory.dmp

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memory/3988-137-0x0000000004E90000-0x0000000004EF6000-memory.dmp

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memory/3988-136-0x0000000004FB0000-0x00000000055D8000-memory.dmp

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memory/3988-135-0x00000000026E0000-0x0000000002716000-memory.dmp

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memory/4820-132-0x0000000000BF0000-0x0000000000EA2000-memory.dmp

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memory/4820-133-0x0000000005C80000-0x0000000005CA2000-memory.dmp

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