remcos | f091affa4bfe7b5d24c784295f49ce788032b3dd89b0160e95caca1d08f92768

General

Target

PO-33463334788.exe
Size

511KB
MD5

77a1c8918ae7893671d3dfe3b410a107
SHA1

c863d6378582314b9898054031b0eb7019cff637
SHA256

f091affa4bfe7b5d24c784295f49ce788032b3dd89b0160e95caca1d08f92768
SHA512

341f7d0749886c8b9efc4e3a2ec2f99bee712418a338a22261fd20d688ddc327cd80754ca36d5f640395cd87c58624b525b3341ac1beab445f45c6d57f1f27b3
SSDEEP

12288:QXbtieDFJ/9GGYLtORcN1zk2Mt4yGOup8WWfL8s:QXxpDFJ/99Y/WKVbs

Score

10^/10

remcos remotehost collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

23.227.202.197:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-QPTXAI
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
Remcos family
remcos

Detected Nirsoft tools 7 IoCs

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

resource	yara_rule
behavioral2/memory/5068-34-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3368-45-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3368-44-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4696-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5068-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4696-33-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4696-49-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5068-34-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/5068-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4696-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4696-33-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4696-49-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
2568	PO-33463334788.exe
2568	PO-33463334788.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	PO-33463334788.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1036	PO-33463334788.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2568	PO-33463334788.exe
1036	PO-33463334788.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2568 set thread context of 1036	2568	PO-33463334788.exe	98
PID 1036 set thread context of 4696	1036	PO-33463334788.exe	100
PID 1036 set thread context of 5068	1036	PO-33463334788.exe	101
PID 1036 set thread context of 3368	1036	PO-33463334788.exe	102

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	PO-33463334788.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-33463334788.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-33463334788.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-33463334788.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO-33463334788.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4696	PO-33463334788.exe
4696	PO-33463334788.exe
3368	PO-33463334788.exe
3368	PO-33463334788.exe
4696	PO-33463334788.exe
4696	PO-33463334788.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2568	PO-33463334788.exe
1036	PO-33463334788.exe
1036	PO-33463334788.exe
1036	PO-33463334788.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3368	PO-33463334788.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1036	PO-33463334788.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 1036	2568	PO-33463334788.exe	98
PID 2568 wrote to memory of 1036	2568	PO-33463334788.exe	98
PID 2568 wrote to memory of 1036	2568	PO-33463334788.exe	98
PID 2568 wrote to memory of 1036	2568	PO-33463334788.exe	98
PID 2568 wrote to memory of 1036	2568	PO-33463334788.exe	98
PID 1036 wrote to memory of 4696	1036	PO-33463334788.exe	100
PID 1036 wrote to memory of 4696	1036	PO-33463334788.exe	100
PID 1036 wrote to memory of 4696	1036	PO-33463334788.exe	100
PID 1036 wrote to memory of 5068	1036	PO-33463334788.exe	101
PID 1036 wrote to memory of 5068	1036	PO-33463334788.exe	101
PID 1036 wrote to memory of 5068	1036	PO-33463334788.exe	101
PID 1036 wrote to memory of 3368	1036	PO-33463334788.exe	102
PID 1036 wrote to memory of 3368	1036	PO-33463334788.exe	102
PID 1036 wrote to memory of 3368	1036	PO-33463334788.exe	102

C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe
"C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe
  "C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1036
- - C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe
    C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe /stext "C:\Users\Admin\AppData\Local\Temp\cjnzqezsvgxwcyxgknb"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4696
- - C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe
    C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe /stext "C:\Users\Admin\AppData\Local\Temp\mmbjqxkujopbfmlkbynvne"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:5068
- - C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe
    C:\Users\Admin\AppData\Local\Temp\PO-33463334788.exe /stext "C:\Users\Admin\AppData\Local\Temp\xggcrpdnxwhfpshokjawprnmt"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
12a91be0dab7b4e82413f324709a968e

SHA1
6bafd44e222726ae18825b4d713e967bbcc9725b

SHA256
797c5825e402402d5fb534c346b939b4f01a00ad159407b5227ea8e456ddd5bc

SHA512
6da8cb8b8727a97a525ff9fa27a6e3ef7cc79863c60f9591432ac2f3ec71669234b40bb90959125f3ceb0c067fdc0f166e08d70ab2bd20b31d2cd3e68f9e06d4

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

Filesize
4KB

MD5
562a58578d6d04c7fb6bda581c57c03c

SHA1
12ab2b88624d01da0c5f5d1441aa21cbc276c5f5

SHA256
ff5c70287ba432a83f9015209d6e933462edca01d68c53c09882e1e4d22241c8

SHA512
3f6e19faa0196bd4c085defa587e664abdd63c25ef30df8f4323e60a5a5aca3cd2709466f772e64ab00fe331d4264841422d6057451947f3500e9252a132254e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsf7996.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/1036-52-0x0000000037510000-0x0000000037529000-memory.dmp

Filesize
100KB

Download
memory/1036-16-0x0000000077088000-0x0000000077089000-memory.dmp

Filesize
4KB

Download
memory/1036-18-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-22-0x0000000077001000-0x0000000077121000-memory.dmp

Filesize
1.1MB

Download
memory/1036-23-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-25-0x0000000077001000-0x0000000077121000-memory.dmp

Filesize
1.1MB

Download
memory/1036-85-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-55-0x0000000037510000-0x0000000037529000-memory.dmp

Filesize
100KB

Download
memory/1036-82-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-58-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-79-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-56-0x0000000037510000-0x0000000037529000-memory.dmp

Filesize
100KB

Download
memory/1036-67-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-61-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/1036-17-0x00000000770A5000-0x00000000770A6000-memory.dmp

Filesize
4KB

Download
memory/1036-64-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2568-15-0x0000000073E65000-0x0000000073E66000-memory.dmp

Filesize
4KB

Download
memory/2568-14-0x0000000077001000-0x0000000077121000-memory.dmp

Filesize
1.1MB

Download
memory/3368-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3368-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3368-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3368-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3368-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4696-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4696-49-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4696-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4696-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4696-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5068-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5068-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5068-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5068-34-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

Analysis

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