remcos | e582b99d0e9ea6b9ee35cc35923ea7c093caf49f3a260091e499ea70924fc423

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 18:36

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General

Target

4b73654cf36400f07cca37f59c1f3045.exe
Size

1.2MB
MD5

4b73654cf36400f07cca37f59c1f3045
SHA1

f48126fe67484770f48c5a4154b72767a047d128
SHA256

e582b99d0e9ea6b9ee35cc35923ea7c093caf49f3a260091e499ea70924fc423
SHA512

e7a07b28cecaba8289bd2aa6b551bb25bc09f858f3fb4a33cda65a9e3dacb248c1a7189edf2c6b44eff2d167b8ad0dc1c78548f86370a581c321369bf654d9b6
SSDEEP

24576:CZVuHRMORLbIddddazvtyrSjX/f3RxyKs7smnUhvZg2ECLdr9wZaQWlHSb:UwRMOJbIddddaQU/f3Rxla/Uh5ECRDB2

Score

10^/10

remcos remotehost collection credential_access discovery persistence rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

23.106.127.123:91

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-TF3JTP
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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 1644 created 3380	1644	4b73654cf36400f07cca37f59c1f3045.exe	55

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 5 IoCs

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

resource	yara_rule
behavioral2/memory/3788-1118-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3860-1117-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3788-1124-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3860-1125-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2188-1127-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3860-1117-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3860-1125-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2188-1127-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	InstallUtil.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Gojxamxsp = "C:\\Users\\Admin\\AppData\\Roaming\\Gojxamxsp.exe"	4b73654cf36400f07cca37f59c1f3045.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1644 set thread context of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 548 set thread context of 2188	548	InstallUtil.exe	96
PID 548 set thread context of 3860	548	InstallUtil.exe	97
PID 548 set thread context of 3788	548	InstallUtil.exe	98

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	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b73654cf36400f07cca37f59c1f3045.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1644	4b73654cf36400f07cca37f59c1f3045.exe
3788	InstallUtil.exe
3788	InstallUtil.exe
2188	InstallUtil.exe
2188	InstallUtil.exe
2188	InstallUtil.exe
2188	InstallUtil.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
548	InstallUtil.exe
548	InstallUtil.exe
548	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1644	4b73654cf36400f07cca37f59c1f3045.exe
Token: SeDebugPrivilege	1644	4b73654cf36400f07cca37f59c1f3045.exe
Token: SeDebugPrivilege	3788	InstallUtil.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 1644 wrote to memory of 548	1644	4b73654cf36400f07cca37f59c1f3045.exe	88
PID 548 wrote to memory of 2188	548	InstallUtil.exe	96
PID 548 wrote to memory of 2188	548	InstallUtil.exe	96
PID 548 wrote to memory of 2188	548	InstallUtil.exe	96
PID 548 wrote to memory of 2188	548	InstallUtil.exe	96
PID 548 wrote to memory of 3860	548	InstallUtil.exe	97
PID 548 wrote to memory of 3860	548	InstallUtil.exe	97
PID 548 wrote to memory of 3860	548	InstallUtil.exe	97
PID 548 wrote to memory of 3860	548	InstallUtil.exe	97
PID 548 wrote to memory of 3788	548	InstallUtil.exe	98
PID 548 wrote to memory of 3788	548	InstallUtil.exe	98
PID 548 wrote to memory of 3788	548	InstallUtil.exe	98
PID 548 wrote to memory of 3788	548	InstallUtil.exe	98

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3380
- C:\Users\Admin\AppData\Local\Temp\4b73654cf36400f07cca37f59c1f3045.exe
  "C:\Users\Admin\AppData\Local\Temp\4b73654cf36400f07cca37f59c1f3045.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1644
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:548
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\gsfyjnzocpyxalprmeidvgqoxkmulmj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2188
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\inkqcgkqqxqkkrlvdpdfgtdxgqwdexzhby"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3860
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /stext "C:\Users\Admin\AppData\Local\Temp\thxbdy"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3788

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
4KB

MD5
2538ec9e8425a905937573069b77d4c2

SHA1
ad0c2b7aff4382e23444d26adac96d9697b849f3

SHA256
29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

SHA512
a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

Download Submit
memory/548-1095-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/548-1103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1644-18-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-1088-0x0000000005390000-0x00000000053E4000-memory.dmp

Filesize
336KB

Download
memory/1644-16-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-2-0x0000000004CA0000-0x0000000004DBC000-memory.dmp

Filesize
1.1MB

Download
memory/1644-4-0x0000000004EC0000-0x0000000004FDE000-memory.dmp

Filesize
1.1MB

Download
memory/1644-54-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-68-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-66-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-64-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-62-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-61-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-58-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-56-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-52-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-50-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-48-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-46-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-44-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-42-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-41-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-39-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-28-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-25-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-23-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-20-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-0-0x00000000752EE000-0x00000000752EF000-memory.dmp

Filesize
4KB

Download
memory/1644-3-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-14-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-1-0x0000000000100000-0x000000000022E000-memory.dmp

Filesize
1.2MB

Download
memory/1644-10-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-8-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-6-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-37-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-35-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-32-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-30-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-26-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-5-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-1077-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-1078-0x0000000005110000-0x00000000051A8000-memory.dmp

Filesize
608KB

Download
memory/1644-1079-0x0000000005070000-0x00000000050BC000-memory.dmp

Filesize
304KB

Download
memory/1644-1083-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-1084-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-1086-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-12-0x0000000004EC0000-0x0000000004FD7000-memory.dmp

Filesize
1.1MB

Download
memory/1644-1087-0x0000000005A20000-0x0000000005FC4000-memory.dmp

Filesize
5.6MB

Download
memory/1644-1085-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/1644-1096-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/2188-1119-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2188-1127-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3788-1118-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3788-1124-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3860-1117-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3860-1125-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download