remcos | b5df8f6578e3bea1306d79065d33f02c61d50b9511936e97a27bb8d35bdeb8c2

Analysis

max time kernel
149s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
27-07-2024 02:21

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General

Target

Shipping documents PO 16103 INV.exe
Size

2.5MB
MD5

671423091cbffb473016291d68a5b49b
SHA1

07f1a0c895fa372f6043fbf013b78321a6939193
SHA256

31fdf75cd3cf71f770eb158141183b08ed0845b27ecd2e90ce20eb3c4e4642c0
SHA512

23782fee548af5a284ac9d833041604a4e1965df0c7f7bad6f4eaa7c1f13a0712c2d3218b868c06cb7779df57ec2f79fdb1dcc1b9f951cda95fa095e925f486e
SSDEEP

49152:Qg7eO7kjTav5AwVZGKY3uS+s1vm1lOt+2QpTay:F7lQfjQd

Score

10^/10

remcos dollar man collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

Dollar Man

178.23.190.118:52499

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-SJ9MVF
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 9 IoCs

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

Processes:

resource	yara_rule
behavioral2/memory/3532-18-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3532-21-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3964-22-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3964-20-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1956-31-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1956-30-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1956-32-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3964-28-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3532-36-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/3964-22-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3964-20-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3964-28-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/3532-18-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3532-21-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3532-36-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

installutil.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	installutil.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Shipping documents PO 16103 INV.exeinstallutil.exe

description	pid	process	target process
PID 3288 set thread context of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3164 set thread context of 3532	3164	installutil.exe	installutil.exe
PID 3164 set thread context of 3964	3164	installutil.exe	installutil.exe
PID 3164 set thread context of 1956	3164	installutil.exe	installutil.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

installutil.exeinstallutil.exeinstallutil.exeinstallutil.exe

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	installutil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs
Adversaries may check for Internet connectivity on compromised systems.
discovery

Internet Connection Discovery
T1016.001

Processes:

Shipping documents PO 16103 INV.exe

pid process

3288 Shipping documents PO 16103 INV.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

installutil.exeinstallutil.exe

pid process

3532 installutil.exe
3532 installutil.exe
1956 installutil.exe
1956 installutil.exe
3532 installutil.exe
3532 installutil.exe
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

installutil.exe

pid process

3164 installutil.exe
3164 installutil.exe
3164 installutil.exe
3164 installutil.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

installutil.exe

description pid process

Token: SeDebugPrivilege 1956 installutil.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

installutil.exe

pid process

3164 installutil.exe

pid	process
3288	Shipping documents PO 16103 INV.exe

pid	process
3532	installutil.exe
3532	installutil.exe
1956	installutil.exe
1956	installutil.exe
3532	installutil.exe
3532	installutil.exe

pid	process
3164	installutil.exe
3164	installutil.exe
3164	installutil.exe
3164	installutil.exe

description	pid	process
Token: SeDebugPrivilege	1956	installutil.exe

pid	process
3164	installutil.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Shipping documents PO 16103 INV.exeinstallutil.exe

description	pid	process	target process
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3288 wrote to memory of 3164	3288	Shipping documents PO 16103 INV.exe	installutil.exe
PID 3164 wrote to memory of 3532	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3532	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3532	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3532	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3964	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3964	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3964	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3964	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3436	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3436	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 3436	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 1956	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 1956	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 1956	3164	installutil.exe	installutil.exe
PID 3164 wrote to memory of 1956	3164	installutil.exe	installutil.exe

C:\Users\Admin\AppData\Local\Temp\Shipping documents PO 16103 INV.exe
"C:\Users\Admin\AppData\Local\Temp\Shipping documents PO 16103 INV.exe"
1⤵
- Suspicious use of SetThreadContext
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:3288

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3164

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\iosekkwk"
3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:3532

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\sqxxkdgevgiy"
3⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
PID:3964

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\dkcplvrfjoadphh"
3⤵
PID:3436

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\dkcplvrfjoadphh"
3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1956

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

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
1e8be73f7f57ec4287483425fb720297

SHA1
62a319bdccc1e5c168172101923f0ca6aa7b5998

SHA256
ee13c77d8eade7b44fb2f5d2dd345ac85ae178afd73589f62dd11a90e237be4a

SHA512
23d677b7bb6907d4d74c3e38e46c8339ee960de0ad4d99c2081702d0768a61e0f6a4e6b3f7fa13425228d902b8f28364752f2415b30ef869e107f259a5fc3b48

Download Submit
C:\Users\Admin\AppData\Local\Temp\iosekkwk

Filesize
4KB

MD5
bb67cb4a1d558663b754221fc46df47d

SHA1
25c46e3fc8d2d615f37caf361bbe31a15808aaae

SHA256
99581e3fb78083e7edb6995aacc8c63d2c8e8814271fc3042cee08ee5858bef9

SHA512
7607a7963b0263d11eab96ea762d779d0ccb2173df2d57a14b02979b27118fb04d719723e9397103f1c3cdba14629c2179756a1f4c98ad75e1a0ea197e911d93

Download Submit
memory/1956-24-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1956-32-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1956-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1956-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1956-29-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3164-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-1-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-42-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3164-41-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3164-39-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3164-2-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3164-0-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3532-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3532-13-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3532-16-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3532-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3532-18-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3964-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3964-19-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3964-20-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3964-22-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3964-15-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download