remcos | 05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 11:11

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General

Target
proof of payment.exe
Size 906KB
Sample240503-nae3esdb2x
SHA256 05a341a2577c728e8a994775b17b8c5562539146d78a5de948e3534e1ae1c629
MD5 931254205cd64ad16b18fc9b318e2ca6
SHA1 4e5c18fcbf06212d952e084b1b455ecc136e4845
SHA512 d6464e122e6eb02d0d32dec6866555bcfe1b644382eda79b6242f93b39df70071a9eb92c66817e2c1cf2d0b7a7bdf09c12b52e21471e56b2bf4ac7c3745332d9
SSDEEP 12288:ppB778QH0fay4iJDieHNq5lVnsUc/Nb2JF5xXwGp94GEXHMY1E7LgHPPkqM7E6:bBWkithtq5jsT/9mb9PUsv7LMPZM7E6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost collection execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

37.120.235.122:2269

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-F9KCYW
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 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1336-60-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1600-59-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/1336-60-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1600-59-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1016-64-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2584	powershell.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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	proof of payment.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1924 set thread context of 2704	1924	proof of payment.exe	32
PID 2704 set thread context of 1600	2704	proof of payment.exe	35
PID 2704 set thread context of 1336	2704	proof of payment.exe	36
PID 2704 set thread context of 1016	2704	proof of payment.exe	37

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

pid	Process
2664	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1924	proof of payment.exe
1924	proof of payment.exe
2584	powershell.exe
1600	proof of payment.exe
1600	proof of payment.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2704	proof of payment.exe
2704	proof of payment.exe
2704	proof of payment.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1924	proof of payment.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	1016	proof of payment.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	proof of payment.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 2584	1924	proof of payment.exe	28
PID 1924 wrote to memory of 2584	1924	proof of payment.exe	28
PID 1924 wrote to memory of 2584	1924	proof of payment.exe	28
PID 1924 wrote to memory of 2584	1924	proof of payment.exe	28
PID 1924 wrote to memory of 2664	1924	proof of payment.exe	30
PID 1924 wrote to memory of 2664	1924	proof of payment.exe	30
PID 1924 wrote to memory of 2664	1924	proof of payment.exe	30
PID 1924 wrote to memory of 2664	1924	proof of payment.exe	30
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 1924 wrote to memory of 2704	1924	proof of payment.exe	32
PID 2704 wrote to memory of 1600	2704	proof of payment.exe	35
PID 2704 wrote to memory of 1600	2704	proof of payment.exe	35
PID 2704 wrote to memory of 1600	2704	proof of payment.exe	35
PID 2704 wrote to memory of 1600	2704	proof of payment.exe	35
PID 2704 wrote to memory of 1600	2704	proof of payment.exe	35
PID 2704 wrote to memory of 1336	2704	proof of payment.exe	36
PID 2704 wrote to memory of 1336	2704	proof of payment.exe	36
PID 2704 wrote to memory of 1336	2704	proof of payment.exe	36
PID 2704 wrote to memory of 1336	2704	proof of payment.exe	36
PID 2704 wrote to memory of 1336	2704	proof of payment.exe	36
PID 2704 wrote to memory of 1016	2704	proof of payment.exe	37
PID 2704 wrote to memory of 1016	2704	proof of payment.exe	37
PID 2704 wrote to memory of 1016	2704	proof of payment.exe	37
PID 2704 wrote to memory of 1016	2704	proof of payment.exe	37
PID 2704 wrote to memory of 1016	2704	proof of payment.exe	37

C:\Users\Admin\AppData\Local\Temp\proof of payment.exe
"C:\Users\Admin\AppData\Local\Temp\proof of payment.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\NvbYSEq.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NvbYSEq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3FCE.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2664
- C:\Users\Admin\AppData\Local\Temp\proof of payment.exe
  "C:\Users\Admin\AppData\Local\Temp\proof of payment.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Users\Admin\AppData\Local\Temp\proof of payment.exe
    "C:\Users\Admin\AppData\Local\Temp\proof of payment.exe" /stext "C:\Users\Admin\AppData\Local\Temp\qjdherfdzezonhyifrccbdtcgktgg"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1600
- - C:\Users\Admin\AppData\Local\Temp\proof of payment.exe
    "C:\Users\Admin\AppData\Local\Temp\proof of payment.exe" /stext "C:\Users\Admin\AppData\Local\Temp\alrafkqfnmrbyvmmpbpvehntpqlphrik"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1336
- - C:\Users\Admin\AppData\Local\Temp\proof of payment.exe
    "C:\Users\Admin\AppData\Local\Temp\proof of payment.exe" /stext "C:\Users\Admin\AppData\Local\Temp\cgwk"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

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

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 4a718f7f8e8065e7a4e064bac86423b4cad92d9085a89748092583f1d9f2709b
MD5 b04a8f243b92c3e7d65f282e86e21f59
SHA1 9cd1a22101d78cf6eda7f3cd63c6bbd95e6c2300
SHA512 384dd49a45d96b8fcffce33dee4b94fad9f54daf2bae0e5965d27f32ff475532e3e3e14d174b73271681d0d0614a1dff0e6bd639040994b07e3dc8255db91aaf
MD5 SHA1 SHA512

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qjdherfdzezonhyifrccbdtcgktgg

Path C:\Users\Admin\AppData\Local\Temp\qjdherfdzezonhyifrccbdtcgktgg
Size 2B
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
MD5 SHA1 SHA512

Submit Download

tmp3FCE.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp3FCE.tmp
Size 1KB
SHA256 c49f6a8d4fd02aa39a53657aade29dda97528c6eeda213b2100458c096c44bf1
MD5 3d79d9ad6a342654f41e602316672edf
SHA1 4897d62b53f8d0334fca89a6112cb0a5a7288560
SHA512 e77fe46608f7a8cb13997801199208394599f1d705d777eddc82b4e0b8738f97aa119441165f17337a75f72953dba0cdf8d745aa1c6bed2d079276bfb810b8f4
MD5 SHA1 SHA512

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memory/1016-63-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/1016-62-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/1016-64-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/1336-58-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1336-56-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1336-60-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1600-57-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1600-59-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1600-53-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1600-54-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1924-3-0x00000000003D0000-0x00000000003E8000-memory.dmp

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memory/1924-0-0x0000000074B6E000-0x0000000074B6F000-memory.dmp

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memory/1924-38-0x0000000074B60000-0x000000007524E000-memory.dmp

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memory/1924-6-0x0000000005110000-0x00000000051D0000-memory.dmp

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memory/1924-2-0x0000000074B60000-0x000000007524E000-memory.dmp

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memory/1924-1-0x0000000001270000-0x0000000001358000-memory.dmp

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memory/1924-4-0x0000000000430000-0x000000000043E000-memory.dmp

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memory/1924-5-0x0000000000440000-0x0000000000456000-memory.dmp

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memory/2704-36-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-33-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-39-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-40-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-41-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-42-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-44-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-46-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-49-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-51-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-26-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-16-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-20-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-22-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-24-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-37-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2704-18-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-31-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-32-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-28-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-15-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-71-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2704-74-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2704-75-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2704-77-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-79-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-80-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-87-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-88-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-96-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-95-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2704-103-0x0000000000400000-0x0000000000482000-memory.dmp

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