remcos | bd8ff468b6fb4958059537257894153fc0cb9eb43f4a05c0b7c42ddd0fac7df9

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19/04/2024, 03:41

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General

Target
Tax Organizer 2023/g2m.dll
Size 25.9MB
Sample240419-d8xp1sff94
SHA256 2643dbabde4595b6505a2c5f74810022a75322cb1c0a7a889783ad794f55df7d
MD5 485b8cc54d8a2fc27a1c0c1cafe21811
SHA1 b0011058e2babc680273aacf9eb382e85532d5a5
SHA512 e7e7c207d76e00b047875b0937b6b81dbfd2623095095aaff656e2b9c90c49b5ba710bf9f997af346a928f7d1967cb39ee842e6ee62792aa5d100d90bdd86560
SSDEEP 196608:+5H3zHriM3lONIfjm0S6VFWxtswdO8Nw3MRfW8+IiAp7kz8roTsWbbh7nkMM9haK:8rmKSPoTsWbbh7nkMGRNc4Y/kyZpJIgi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

faststaynow.duckdns.org:5057

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-DRFJJD
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
12	2208	WScript.exe
14	3004	WScript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\HEARTB.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2200	regsvr32.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 360 wrote to memory of 2200	360	regsvr32.exe	28
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 2200 wrote to memory of 1048	2200	regsvr32.exe	29
PID 1048 wrote to memory of 2208	1048	regsvr32.exe	31
PID 1048 wrote to memory of 2208	1048	regsvr32.exe	31
PID 1048 wrote to memory of 2208	1048	regsvr32.exe	31
PID 1048 wrote to memory of 2208	1048	regsvr32.exe	31
PID 1048 wrote to memory of 3004	1048	regsvr32.exe	33
PID 1048 wrote to memory of 3004	1048	regsvr32.exe	33
PID 1048 wrote to memory of 3004	1048	regsvr32.exe	33
PID 1048 wrote to memory of 3004	1048	regsvr32.exe	33
PID 2200 wrote to memory of 2044	2200	regsvr32.exe	34
PID 2200 wrote to memory of 2044	2200	regsvr32.exe	34
PID 2200 wrote to memory of 2044	2200	regsvr32.exe	34
PID 2200 wrote to memory of 2044	2200	regsvr32.exe	34
PID 2044 wrote to memory of 1828	2044	cmd.exe	36
PID 2044 wrote to memory of 1828	2044	cmd.exe	36
PID 2044 wrote to memory of 1828	2044	cmd.exe	36
PID 2044 wrote to memory of 1828	2044	cmd.exe	36

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\Tax Organizer 2023\g2m.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:360
- C:\Windows\SysWOW64\regsvr32.exe
  /s "C:\Users\Admin\AppData\Local\Temp\Tax Organizer 2023\g2m.dll"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1048
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
      4⤵
      Blocklisted process makes network request
      PID:2208
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
      4⤵
      Blocklisted process makes network request
      PID:3004
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2044
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      PID:1828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Memory.vbs

Path C:\Users\Admin\AppData\Local\Temp\Memory.vbs
Size 6.8MB
SHA256 f90c2ec81fb78e657dc3d359bcf59a557d56ddc8e1b33e9b205707a221e21f36
MD5 8f3213dd5a26f9faf8b278b11c3c2c8f
SHA1 e2af8417a760edbcad8ff75ba7eed8f7bd653487
SHA512 0bbe6acf8ab4e704fef80960eb50044e2978cf3d8b38aea837ae49019be24aa4c6090ba0e84d3d4c636697079e6d44323e976010e83ea93f9f7db95c2d2f7159
SSDEEP 24576:F8jVQ8jVT5tlxuSylBNxaR0L3j8jVt8jVj8jVf8jVv8jVV8jVd8jVK8jV88jVs8b:klxMimWUcPp5o122lReRWSCMaE
MD5 SHA1 SHA512 SSDEEP

Submit Download

CNECB.tmp

Path C:\Users\Admin\AppData\Roaming\WindowsServices\CNECB.tmp
Size 966KB
SHA256 703588188e5c764857935cc21c6466d822b88ad3d8aca0f14827184718f29a76
MD5 862c15aa93e709a74729218e2adf6bf3
SHA1 b6cda89f33bc375e3f1eccf73802a4d02426f7d3
SHA512 4f053949a459c51bcb3ea4bf81ceb899b46e6067910a9c0af10af9e38375178533abbcd6f16405d979c61fd376dd33dc2a91c1df3abc5d26a9cd47d30dc86d25
SSDEEP 12288:KAP5tlxfGS+lBMu6Wf4KlSXa9Xl9/noLIbbSygBii2b/52EM+TVL32:75tlxuSylBNxaR0L32
MD5 SHA1 SHA512 SSDEEP

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VJQSJ.cmd

Path C:\Users\Admin\AppData\Roaming\WindowsServices\VJQSJ.cmd
Size 75B
SHA256 b05c782898be147fc51e30f958325cf4d0494a46ee37ae8bbe52d47202aa792e
MD5 98a00a7606758604e4af1ffcd456465a
SHA1 14f816305992f17a0c082f307d3f73ab94c1f859
SHA512 99c37921a6ed3c380848ee10a1edc5f61e807bdc25db9f4f64f9242029c12dc0430e72483c59716d1270714241f7cf8180564b49180ba63d4961fb70dbd60901
MD5 SHA1 SHA512

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FDNUA.vbs

Path C:\Users\Admin\Start Menu\Programs\Startup\FDNUA.vbs
Size 276B
SHA256 5819dd543e8a14f37c805762dcd5a5d29d7dad9ff8c16041605576cab4fb2fd0
MD5 0f6fb21da68a3c96727f7b3f41c6396e
SHA1 556af81855f434e38ad4a48a99f1c026ee7490d8
SHA512 26ca306248dcd8af7e02cad85058823b6f46a49d0af6264311d096dd942471ca151b6978a813270b3858e3309f55313006422a836fcdf11bd56042513c2fbd9b
MD5 SHA1 SHA512

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WindowsServices-RDGVW.lnk

Path C:\Users\Admin\Start Menu\Programs\Startup\WindowsServices-RDGVW.lnk
Size 941B
SHA256 d13d76a6d5fbf36560a78dfe0d0c7b65e4f36dc117ca2d9e8849183197a37272
MD5 77af7dd0d5ec8c0090561c6a295eba28
SHA1 ce46c23bdb02ba5edb03e5bf3787fdea8827c658
SHA512 b8cad1c1e8ba0e717e5d7c0245396e36243780ced5ce6cb597304eac89bd653c0da8f05f6672932d92468852849d3b1f4598a0b907c81c880a980f0f2e56e774
MD5 SHA1 SHA512

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memory/1048-26-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-31-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-17-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-15-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-66-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-8-0x0000000000090000-0x0000000000091000-memory.dmp

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memory/1048-2-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-19-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-20-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-21-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-23-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-65-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-14-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-18-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-35-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-10-0x0000000000090000-0x0000000000091000-memory.dmp

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memory/1048-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1048-64-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-62-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-58-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/1048-59-0x0000000000120000-0x00000000001A2000-memory.dmp

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memory/2200-3-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2200-5-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2200-1-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2200-13-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2208-60-0x0000000000F80000-0x0000000000F81000-memory.dmp

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memory/3004-61-0x0000000000D70000-0x0000000000D71000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads