remcos | b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55

Analysis

max time kernel
148s
max time network
144s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
28-05-2024 01:30

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General

Target

b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe
Size

826KB
MD5

87aca91fc9b0ce5a4bc495b90133319e
SHA1

c51e9b32b39ab0bdc06055eaef3b38fc789844eb
SHA256

b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55
SHA512

a82ca6603265b8f31f0c4f478ff57cdff8bf9abc372653433b8090ecb3be9cbfc002cec3c6f0af7c3395a379fa7370608d6aa8ae45bc6e388446f7e81376fb28
SSDEEP

24576:oBXu9HGaVHwqf4Xabh4SqgjBKgBRlWbAL:ow9VHwqf4WeSxdKA

Score

10^/10

remcos remotehost collection rat upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

91.92.249.107:85

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-PZE93C
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

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 20 IoCs

resource	yara_rule
behavioral1/memory/2260-12-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-14-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-19-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-18-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-16-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-20-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-21-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-22-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-24-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-25-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-56-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-57-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-58-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-59-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-60-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-61-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-62-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-63-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-66-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral1/memory/2260-67-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Detects executables built or packed with MPress PE compressor 16 IoCs

resource	yara_rule
behavioral1/memory/2652-31-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2544-32-0x0000000000400000-0x0000000000478000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2816-42-0x0000000000400000-0x0000000000424000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2816-43-0x0000000000400000-0x0000000000424000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2816-41-0x0000000000400000-0x0000000000424000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2544-38-0x0000000000400000-0x0000000000478000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2544-36-0x0000000000400000-0x0000000000478000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2652-35-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2544-34-0x0000000000400000-0x0000000000478000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2544-48-0x0000000000400000-0x0000000000478000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2260-51-0x0000000010000000-0x0000000010019000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2260-55-0x0000000010000000-0x0000000010019000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral1/memory/2260-54-0x0000000010000000-0x0000000010019000-memory.dmp	INDICATOR_EXE_Packed_MPress

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs

resource	yara_rule
behavioral1/memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral1/memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral1/memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs

resource	yara_rule
behavioral1/memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
behavioral1/memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
behavioral1/memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2544-38-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2544-36-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2544-48-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral1/memory/2816-43-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2544-38-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2544-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2544-48-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/1340-0-0x0000000000160000-0x0000000000329000-memory.dmp	UPX
behavioral1/memory/1340-11-0x0000000000160000-0x0000000000329000-memory.dmp	UPX
behavioral1/memory/1340-17-0x0000000000160000-0x0000000000329000-memory.dmp	UPX

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1340-0-0x0000000000160000-0x0000000000329000-memory.dmp	upx
behavioral1/memory/1340-11-0x0000000000160000-0x0000000000329000-memory.dmp	upx
behavioral1/memory/1340-17-0x0000000000160000-0x0000000000329000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/1340-11-0x0000000000160000-0x0000000000329000-memory.dmp	autoit_exe
behavioral1/memory/1340-17-0x0000000000160000-0x0000000000329000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1340 set thread context of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 2260 set thread context of 2544	2260	svchost.exe	29
PID 2260 set thread context of 2652	2260	svchost.exe	30
PID 2260 set thread context of 2816	2260	svchost.exe	31

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2544	svchost.exe
2544	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe
2260	svchost.exe
2260	svchost.exe
2260	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe
1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe
1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 1340 wrote to memory of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 1340 wrote to memory of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 1340 wrote to memory of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 1340 wrote to memory of 2260	1340	b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe	28
PID 2260 wrote to memory of 2544	2260	svchost.exe	29
PID 2260 wrote to memory of 2544	2260	svchost.exe	29
PID 2260 wrote to memory of 2544	2260	svchost.exe	29
PID 2260 wrote to memory of 2544	2260	svchost.exe	29
PID 2260 wrote to memory of 2544	2260	svchost.exe	29
PID 2260 wrote to memory of 2652	2260	svchost.exe	30
PID 2260 wrote to memory of 2652	2260	svchost.exe	30
PID 2260 wrote to memory of 2652	2260	svchost.exe	30
PID 2260 wrote to memory of 2652	2260	svchost.exe	30
PID 2260 wrote to memory of 2652	2260	svchost.exe	30
PID 2260 wrote to memory of 2816	2260	svchost.exe	31
PID 2260 wrote to memory of 2816	2260	svchost.exe	31
PID 2260 wrote to memory of 2816	2260	svchost.exe	31
PID 2260 wrote to memory of 2816	2260	svchost.exe	31
PID 2260 wrote to memory of 2816	2260	svchost.exe	31

C:\Users\Admin\AppData\Local\Temp\b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe
"C:\Users\Admin\AppData\Local\Temp\b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\b6ef9315154feca08a0c4e65b650af9cb30fba63be8739507d9cc76ad034ef55.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2260
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\iizsxrhibumynpjvzrmxywwwrn"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2544
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\kcmkxksbpcedxvgziczzbjqnauzap"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2652
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\verdyclddkwiakudzmusmolwbijjioki"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1340-17-0x0000000000160000-0x0000000000329000-memory.dmp

Filesize
1.8MB

Download
memory/1340-11-0x0000000000160000-0x0000000000329000-memory.dmp

Filesize
1.8MB

Download
memory/1340-0-0x0000000000160000-0x0000000000329000-memory.dmp

Filesize
1.8MB

Download
memory/2260-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2260-54-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2260-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2260-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2260-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2544-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2544-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2544-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2544-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2544-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2544-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2652-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2652-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2652-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2652-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2652-50-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2652-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2816-40-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2816-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2816-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2816-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download