remcos | ac43825c40c583e02818f1f76e97376fa1f94451e41acc8ce58afc84f081577d

Resubmissions

14/08/2024, 22:40

240814-2l2bpavapl10

06/08/2024, 19:59

240806-yqhhlasemd10

Analysis

max time kernel
154s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
14/08/2024, 22:40

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Report Analysis Logs

General

Target
39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe
Size 670KB
Sample240814-2l2bpavapl
SHA256 39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a
MD5 31dea80f55b9485ad4dd9a8636b7b12e
SHA1 d6987a2bed5c0af40ffa425a8bcd5960bc2a16b7
SHA512 2cca917add60b40c877a315b50382583c3a6a07055290dfa7345214e6d9cbfe501ef524f65f3427672231b8a241e8ec0394231e1cd0d606baa706bc9e3df84ad
SSDEEP 12288:cu70DgkcKSx+zPDp2eZcnbgvsFxqFGC4SEYSU+9vzqqYVYRDl0u:T4DgksE3ZvvsFxqFX/EYD+1fYVsn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

194.169.175.190:2404

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-LBZ2BK
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 8 IoCs

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

resource	yara_rule
behavioral1/memory/568-30-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1376-31-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1376-35-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1376-37-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/3660-36-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/3660-29-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/3660-27-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/568-39-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1376-31-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/1376-35-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/1376-37-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/568-30-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/568-39-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-6179872-1886041298-1573312864-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Caspol.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3280 set thread context of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 4356 set thread context of 568	4356	Caspol.exe	80
PID 4356 set thread context of 1376	4356	Caspol.exe	81
PID 4356 set thread context of 3660	4356	Caspol.exe	82

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Panther\UnattendGC\setupact.log	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\setuperr.log	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\diagerr.xml	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\diagwrn.xml	UserOOBEBroker.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	Caspol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caspol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caspol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DllHost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FileCoAuth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FileCoAuth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Caspol.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe
3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe
568	Caspol.exe
568	Caspol.exe
3660	Caspol.exe
3660	Caspol.exe
568	Caspol.exe
568	Caspol.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5016	OpenWith.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
4356	Caspol.exe
4356	Caspol.exe
4356	Caspol.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe
Token: SeDebugPrivilege	3660	Caspol.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3816	OpenWith.exe
5016	OpenWith.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3280 wrote to memory of 3984	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	78
PID 3280 wrote to memory of 3984	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	78
PID 3280 wrote to memory of 3984	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	78
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 3280 wrote to memory of 4356	3280	39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe	79
PID 4356 wrote to memory of 568	4356	Caspol.exe	80
PID 4356 wrote to memory of 568	4356	Caspol.exe	80
PID 4356 wrote to memory of 568	4356	Caspol.exe	80
PID 4356 wrote to memory of 568	4356	Caspol.exe	80
PID 4356 wrote to memory of 1376	4356	Caspol.exe	81
PID 4356 wrote to memory of 1376	4356	Caspol.exe	81
PID 4356 wrote to memory of 1376	4356	Caspol.exe	81
PID 4356 wrote to memory of 1376	4356	Caspol.exe	81
PID 4356 wrote to memory of 3660	4356	Caspol.exe	82
PID 4356 wrote to memory of 3660	4356	Caspol.exe	82
PID 4356 wrote to memory of 3660	4356	Caspol.exe	82
PID 4356 wrote to memory of 3660	4356	Caspol.exe	82

C:\Users\Admin\AppData\Local\Temp\39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe
"C:\Users\Admin\AppData\Local\Temp\39c096e77e2ce57c75d07b577dbf5899b5e883a3d3435a0a3d0313a52718496a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  PID:3984
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4356
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\acydjhnbybzxb"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:568
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\ledoczyvmjrcmrfwj"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1376
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\vyigcsiwarjhoxbatjav"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3660

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
1⤵
- System Location Discovery: System Language Discovery
PID:796

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,Control_RunDLL C:\Windows\System32\srchadmin.dll ,
1⤵
PID:428

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:3204

C:\Windows\System32\oobe\UserOOBEBroker.exe
C:\Windows\System32\oobe\UserOOBEBroker.exe -Embedding
1⤵
- Drops file in Windows directory
PID:3856

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding
1⤵
- System Location Discovery: System Language Discovery
PID:1800

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
PID:3816

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:5016

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding
1⤵
- System Location Discovery: System Language Discovery
PID:1376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

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Downloads

FileCoAuth-2024-8-14.2242.1800.1.odl

Path C:\Users\Admin\AppData\Local\Microsoft\OneDrive\logs\Common\FileCoAuth-2024-8-14.2242.1800.1.odl
Size 706B
SHA256 8158177911b2fcb9a5e996c4f8c2d5b61c907dc9d41896e1f01f047bbc29afff
MD5 ccfa91c2843af000942a31acd009a58b
SHA1 82e0b7386d84fcb3e4417d73d7fc3277d524261b
SHA512 567ed0d86cce52fe5321bf3a9861cf1048fc802305b94ed7cbb8301f8a05532cfa5cba7c08bb32f21fcf6d888f29c9ff7e3c96e1a666504d51d996640eadcdc4
MD5 SHA1 SHA512

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acydjhnbybzxb

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

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memory/568-24-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/568-39-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/568-30-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/568-18-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/568-28-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/1376-19-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1376-25-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1376-35-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1376-37-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1376-31-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/3280-2-0x0000018E643A0000-0x0000018E6441E000-memory.dmp

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memory/3280-1-0x0000018E49E30000-0x0000018E49EDC000-memory.dmp

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memory/3280-9-0x00007FFA1A570000-0x00007FFA1B032000-memory.dmp

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memory/3280-3-0x00007FFA1A570000-0x00007FFA1B032000-memory.dmp

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memory/3280-0-0x00007FFA1A573000-0x00007FFA1A575000-memory.dmp

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memory/3280-4-0x0000018E4A2E0000-0x0000018E4A2F4000-memory.dmp

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memory/3660-27-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3660-29-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3660-36-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3660-26-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3660-21-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4356-14-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-46-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-15-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-16-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-13-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-12-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-11-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-10-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-8-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-7-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-41-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4356-45-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4356-44-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4356-17-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-47-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-48-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-49-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-50-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-51-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-5-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-61-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-62-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-63-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4356-64-0x0000000000400000-0x0000000000482000-memory.dmp

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