remcos | 31fdf75cd3cf71f770eb158141183b08ed0845b27ecd2e90ce20eb3c4e4642c0

Analysis

max time kernel
147s
max time network
141s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
26/07/2024, 21:54

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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.

resource	yara_rule
behavioral1/memory/2548-20-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2548-24-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/3012-35-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/3028-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/3012-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/3028-30-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/3028-36-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2548-41-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/3012-44-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/3012-35-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/3012-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/3012-44-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2548-20-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2548-24-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2548-41-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	installutil.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2276 set thread context of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2760 set thread context of 2548	2760	installutil.exe	33
PID 2760 set thread context of 3012	2760	installutil.exe	36
PID 2760 set thread context of 3028	2760	installutil.exe	38

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

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

pid	Process
2276	Shipping documents PO 16103 INV.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2548	installutil.exe
2548	installutil.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2760	installutil.exe
2760	installutil.exe
2760	installutil.exe
2760	installutil.exe
2760	installutil.exe
2760	installutil.exe
2760	installutil.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3028	installutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2760	installutil.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2276 wrote to memory of 2760	2276	Shipping documents PO 16103 INV.exe	31
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2540	2760	installutil.exe	32
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2548	2760	installutil.exe	33
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2596	2760	installutil.exe	34
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 2616	2760	installutil.exe	35
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 3012	2760	installutil.exe	36
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 2208	2760	installutil.exe	37
PID 2760 wrote to memory of 3028	2760	installutil.exe	38
PID 2760 wrote to memory of 3028	2760	installutil.exe	38
PID 2760 wrote to memory of 3028	2760	installutil.exe	38
PID 2760 wrote to memory of 3028	2760	installutil.exe	38

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:2276
- 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:2760
- - 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\kzyxjaaocn"
    3⤵
    PID:2540
- - 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\kzyxjaaocn"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2548
- - 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\vcehktkqqvmzd"
    3⤵
    PID:2596
- - 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\vcehktkqqvmzd"
    3⤵
    PID:2616
- - 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\vcehktkqqvmzd"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3012
- - 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\xwrallvkedemnagq"
    3⤵
    PID:2208
- - 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\xwrallvkedemnagq"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3028

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
090a0cdc39ad7d708af09f3de76bac81

SHA1
58b700cf07d3ea2a1cac3aa4c1d0371a40815c2d

SHA256
8da9a32925fcc8db34fa2b93838c16d7a82a95c4530a1219210ac9a03cffdab1

SHA512
37ff0006276de1a7cedd1e86f4b9925525c64a801b4d5e63eee32300c270c4b06918b588a408f84fe6d57e0be9269f29dc9507ffb4581c88a0ceb402e1ae8684

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2548-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2548-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2548-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2548-20-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2548-19-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2548-17-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2760-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-0-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-2-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-45-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2760-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2760-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2760-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3012-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3012-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3012-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3012-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3012-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3012-23-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3028-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3028-29-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3028-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3028-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3028-27-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download