remcos | bd8ff468b6fb4958059537257894153fc0cb9eb43f4a05c0b7c42ddd0fac7df9

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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
42	976	WScript.exe
56	2200	WScript.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	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-1-5-21-2177723727-746291240-1644359950-1000\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
2192	regsvr32.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000_Classes\Local Settings	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
460	powershell.exe
460	powershell.exe
4908	powershell.exe
4908	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	460	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 2192	4768	regsvr32.exe	86
PID 4768 wrote to memory of 2192	4768	regsvr32.exe	86
PID 4768 wrote to memory of 2192	4768	regsvr32.exe	86
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 4320	2192	regsvr32.exe	87
PID 2192 wrote to memory of 1340	2192	regsvr32.exe	88
PID 2192 wrote to memory of 1340	2192	regsvr32.exe	88
PID 2192 wrote to memory of 1340	2192	regsvr32.exe	88
PID 1340 wrote to memory of 3844	1340	cmd.exe	90
PID 1340 wrote to memory of 3844	1340	cmd.exe	90
PID 1340 wrote to memory of 3844	1340	cmd.exe	90
PID 4320 wrote to memory of 976	4320	regsvr32.exe	91
PID 4320 wrote to memory of 976	4320	regsvr32.exe	91
PID 4320 wrote to memory of 976	4320	regsvr32.exe	91
PID 4320 wrote to memory of 2200	4320	regsvr32.exe	92
PID 4320 wrote to memory of 2200	4320	regsvr32.exe	92
PID 4320 wrote to memory of 2200	4320	regsvr32.exe	92
PID 976 wrote to memory of 4104	976	WScript.exe	101
PID 976 wrote to memory of 4104	976	WScript.exe	101
PID 976 wrote to memory of 4104	976	WScript.exe	101
PID 4104 wrote to memory of 460	4104	cmd.exe	104
PID 4104 wrote to memory of 460	4104	cmd.exe	104
PID 4104 wrote to memory of 460	4104	cmd.exe	104
PID 2200 wrote to memory of 2620	2200	WScript.exe	105
PID 2200 wrote to memory of 2620	2200	WScript.exe	105
PID 2200 wrote to memory of 2620	2200	WScript.exe	105
PID 2620 wrote to memory of 4908	2620	cmd.exe	107
PID 2620 wrote to memory of 4908	2620	cmd.exe	107
PID 2620 wrote to memory of 4908	2620	cmd.exe	107

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\Tax Organizer 2023\g2m.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:4768
- 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:2192
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:4320
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
      4⤵
      Blocklisted process makes network request
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:976
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\WindowsServices\VJQSJ.cmd" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4104
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        PowerShell.exe -NoProfile -ExecutionPolicy Bypass -Command C:\Users\Admin\AppData\Roaming\WindowsServices\FNOBH.ps1
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:460
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
      4⤵
      Blocklisted process makes network request
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:2200
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\WindowsServices\VJQSJ.cmd" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2620
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        PowerShell.exe -NoProfile -ExecutionPolicy Bypass -Command C:\Users\Admin\AppData\Roaming\WindowsServices\FNOBH.ps1
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4908
- - 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:1340
  - - 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:3844

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 1KB
SHA256 b23ced31b855e5a39c94afa1f9d55b023b8c40d4dc62143e0539c6916c12c9d2
MD5 33b19d75aa77114216dbc23f43b195e3
SHA1 36a6c3975e619e0c5232aa4f5b7dc1fec9525535
SHA512 676fa2fd34878b75e5899197fe6826bb5604541aa468804bc9835bd3acabed2e6759878a8f1358955413818a51456816e90f149133828575a416c2a74fc7d821
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 15KB
SHA256 9a5e05a2b10fca6060ce17892b195a1e5ee85c80282f4fb570c2d4f4cf3d7224
MD5 0dcb955c9e574006771a5f045f7e44e9
SHA1 4a0ceb881db88de1c20a95197c55647f2962a7d5
SHA512 519b0d76cfacb88c03b66a53d2bd974f4cef87a09891329fe1022c22667e3414514dea1b96cf5b6d6baa3f32b66959f05329f1bc1a5d8ce33e4132d89f1b1ecf
SSDEEP 384:Irf++9i+tfccPkBFEkJk4o9o2TJK6seYZsE/Qi3SoZO9s1lu9Alwntb5:SfXfI/EFto2TJN2LnShGlvYL
MD5 SHA1 SHA512 SSDEEP

Submit Download

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

__PSScriptPolicyTest_pou3grbs.rkb.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pou3grbs.rkb.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

FDNUA.vbs

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

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

Submit Download

WindowsServices-RDGVW.lnk

Path C:\Users\Admin\Start Menu\Programs\Startup\WindowsServices-RDGVW.lnk
Size 1KB
SHA256 e4a3626b1227d4490cca72f613567dfd0442be6d6bcbd525248dd41ccc76233d
MD5 b010b266f7599b73adf6b3ef5abf12d8
SHA1 72f23c0fd301a3594f6c5ba0c0544ee3867271ed
SHA512 60592820f30097e330a490d2a27f2d26d231eb32ee5eecee446caaeb9dbd364be5be0b07ad0043bff4d2646e3a8dac14a8c4962bff9f7a672be3b59208cb98cb
MD5 SHA1 SHA512

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memory/460-72-0x00000000051D0000-0x00000000057F8000-memory.dmp

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memory/460-70-0x0000000072A60000-0x0000000073210000-memory.dmp

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memory/460-76-0x0000000005A70000-0x0000000005AD6000-memory.dmp

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memory/460-69-0x0000000004B60000-0x0000000004B96000-memory.dmp

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memory/460-85-0x0000000005CC0000-0x0000000006014000-memory.dmp

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memory/460-73-0x0000000005180000-0x00000000051A2000-memory.dmp

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memory/460-86-0x0000000006110000-0x000000000612E000-memory.dmp

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memory/460-84-0x0000000005C50000-0x0000000005CB6000-memory.dmp

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memory/460-71-0x0000000004B50000-0x0000000004B60000-memory.dmp

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memory/460-87-0x0000000006150000-0x000000000619C000-memory.dmp

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memory/460-90-0x0000000072A60000-0x0000000073210000-memory.dmp

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memory/2192-9-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2192-4-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/2192-0-0x0000000010000000-0x0000000011A85000-memory.dmp

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memory/4320-15-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-5-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-66-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-29-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-24-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-19-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-16-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-14-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-13-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-12-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-11-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-10-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-7-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-67-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-112-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-111-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-110-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-109-0x0000000000E80000-0x0000000000F02000-memory.dmp

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memory/4320-1-0x0000000000F10000-0x0000000000F11000-memory.dmp

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memory/4908-106-0x0000000006440000-0x000000000648C000-memory.dmp

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memory/4908-108-0x0000000073010000-0x00000000737C0000-memory.dmp

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memory/4908-104-0x0000000005D00000-0x0000000006054000-memory.dmp

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memory/4908-94-0x0000000002D00000-0x0000000002D10000-memory.dmp

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memory/4908-93-0x0000000002D00000-0x0000000002D10000-memory.dmp

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memory/4908-92-0x0000000073010000-0x00000000737C0000-memory.dmp

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