remcos | d7a7a6550d5e7c8fafe12dbed4b342114f27815c39515d68f5482984b1497673

General

Target

d7a7a6550d5e7c8fafe12dbed4b342114f27815c39515d68f5482984b1497673.rtf
Size

659KB
MD5

7df152da06e5d2f3df5b86722d756e8f
SHA1

63be60641defd5addffcc8f1fb01d4cb2e87a8ed
SHA256

d7a7a6550d5e7c8fafe12dbed4b342114f27815c39515d68f5482984b1497673
SHA512

444f93d17c24c7946fd2804ca4f5438706a9a5c0f29caea51b5ed788b9ac00a390f822e035c698d2737de729fc7b78d28ebc4d25f524c9c8ab6b79c42c00454b
SSDEEP

6144:1wAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAr:1

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

www.kposlifestyle.design: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
edefdefffff
mouse_option
false
mutex
Rmc-OH1QS4
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
4	2752	EQNEDT32.EXE
7	2752	EQNEDT32.EXE

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1020	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2712	plugchromeiume.exe
2000	plugchromeiume.exe

Loads dropped DLL 1 IoCs

pid	Process
2752	EQNEDT32.EXE

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2712 set thread context of 2000	2712	plugchromeiume.exe	36

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

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	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	plugchromeiume.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	plugchromeiume.exe

Office loads VBA resources, possible macro or embedded object present

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2752	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2552	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1020	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1020	powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2552	WINWORD.EXE
2552	WINWORD.EXE
2000	plugchromeiume.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 2712	2752	EQNEDT32.EXE	29
PID 2752 wrote to memory of 2712	2752	EQNEDT32.EXE	29
PID 2752 wrote to memory of 2712	2752	EQNEDT32.EXE	29
PID 2752 wrote to memory of 2712	2752	EQNEDT32.EXE	29
PID 2552 wrote to memory of 2828	2552	WINWORD.EXE	33
PID 2552 wrote to memory of 2828	2552	WINWORD.EXE	33
PID 2552 wrote to memory of 2828	2552	WINWORD.EXE	33
PID 2552 wrote to memory of 2828	2552	WINWORD.EXE	33
PID 2712 wrote to memory of 1020	2712	plugchromeiume.exe	34
PID 2712 wrote to memory of 1020	2712	plugchromeiume.exe	34
PID 2712 wrote to memory of 1020	2712	plugchromeiume.exe	34
PID 2712 wrote to memory of 1020	2712	plugchromeiume.exe	34
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36
PID 2712 wrote to memory of 2000	2712	plugchromeiume.exe	36

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\d7a7a6550d5e7c8fafe12dbed4b342114f27815c39515d68f5482984b1497673.rtf"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:2828

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Users\Admin\AppData\Roaming\plugchromeiume.exe
  "C:\Users\Admin\AppData\Roaming\plugchromeiume.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\plugchromeiume.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1020
- - C:\Users\Admin\AppData\Roaming\plugchromeiume.exe
    "C:\Users\Admin\AppData\Roaming\plugchromeiume.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\edefdefffff\logs.dat

Filesize
326B

MD5
1f0119960b07bbb268cb87fcbc1103b1

SHA1
386470e4ae502d9968530789805eabf600df9755

SHA256
2ef783bed085f4a0626abb500020c880d6ad0f7dccbd7e5e3fee432b92b661e3

SHA512
9870e0c23cf881800c3bac64ad004fc3feb0ed860c3331f3313a61066fe5148b0feefec3c15ef262cf1123bc70cf537acf07420a84a723a29253698a5e33d3e7

Download Submit
\Users\Admin\AppData\Roaming\plugchromeiume.exe

Filesize
1.0MB

MD5
139a100bdbef4afcd45377d48b1beb85

SHA1
060748f2572808df5c93131a5656fff82ab870c1

SHA256
3ba181bbdfdd57e0fbc79d5eec317db90663f5f9bd5ac306ec246b1a6f0b4640

SHA512
716c0cb31a58a261c72b54225ebd2e6f310363d9f884ccd9eac394b70fa6f1b9cfbdced87c0bf004facb9e3c7d43b58ab7e6f2e19b0142611e6c935044b55afb

Download Submit
memory/2000-59-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-72-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-41-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-95-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-88-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-87-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-58-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-55-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-54-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-52-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-51-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2000-49-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-47-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-45-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-96-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-39-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-43-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-62-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2000-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2552-2-0x0000000071A5D000-0x0000000071A68000-memory.dmp

Filesize
44KB

Download
memory/2552-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2552-36-0x0000000071A5D000-0x0000000071A68000-memory.dmp

Filesize
44KB

Download
memory/2552-0-0x000000002F941000-0x000000002F942000-memory.dmp

Filesize
4KB

Download
memory/2712-30-0x0000000001210000-0x000000000131C000-memory.dmp

Filesize
1.0MB

Download
memory/2712-38-0x0000000006230000-0x00000000062F4000-memory.dmp

Filesize
784KB

Download
memory/2712-31-0x0000000000C00000-0x0000000000C26000-memory.dmp

Filesize
152KB

Download

Analysis

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