remcos | 52171e2ce416f16ddfc7eae063a610badf15a83da5fef831b0acd05e54906c59

General

Target

decoded_3stage.ps1
Size

1023B
MD5

49e37de2f7edc6ec685b974554e7f2fa
SHA1

a7ce3554a0c0d9e5c95bcc0f8bcd92ad18099a23
SHA256

52171e2ce416f16ddfc7eae063a610badf15a83da5fef831b0acd05e54906c59
SHA512

2ca054158129052877d8ba4bae81abd8bda8abde508ee17edaf3de304a7d584b759f40fb2605c3b3aea1380f40f9d0d7b70b04e01f83247440dc1ac91a02e019

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

top.noforabusers1.xyz:2090

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-1IWDHQ
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

Processes:

powershell.exe

flow pid process

13 3084 powershell.exe
30 3084 powershell.exe

flow	pid	process
13	3084	powershell.exe
30	3084	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

powershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2192493100-457715857-1189582111-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Path = "C:\\ProgramData\\regasm.vbe"	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 3084 set thread context of 3428 3084 powershell.exe RegAsm.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

3084 powershell.exe
3084 powershell.exe
1132 powershell.exe
1132 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 3084 powershell.exe
Token: SeDebugPrivilege 1132 powershell.exe

description	pid	process	target process
PID 3084 set thread context of 3428	3084	powershell.exe	RegAsm.exe

pid	process
3084	powershell.exe
3084	powershell.exe
1132	powershell.exe
1132	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3084	powershell.exe
Token: SeDebugPrivilege	1132	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 3084 wrote to memory of 1132	3084	powershell.exe	powershell.exe
PID 3084 wrote to memory of 1132	3084	powershell.exe	powershell.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe
PID 3084 wrote to memory of 3428	3084	powershell.exe	RegAsm.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\decoded_3stage.ps1
1⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3084

C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe" -WindowStyle Hidden Copy-Item -Path *.vbe -Destination C:\ProgramData\regasm.vbe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1132

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:3428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
6cf293cb4d80be23433eecf74ddb5503

SHA1
24fe4752df102c2ef492954d6b046cb5512ad408

SHA256
b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

SHA512
0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
aff57c5c51c697fe6db7a667ed9bf0e3

SHA1
da21cd728e30dc5d8973a2840ef5919d83f965ca

SHA256
613983c3b08559da98de4c799cced0b0d626c35e2065a85ba20232c5a088b1e4

SHA512
071ba086883deeffbce9d64186f8f1c7b9af733d847e5c3c6784c394b542da543132b062ddf50434a84187cb39e74326439dc3d70f14e7ceaac3cd59f8ab1409

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gmpxec2z.crr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1132-23-0x00007FFDDE2A0000-0x00007FFDDED61000-memory.dmp

Filesize
10.8MB

Download
memory/1132-43-0x00007FFDDE2A0000-0x00007FFDDED61000-memory.dmp

Filesize
10.8MB

Download
memory/3084-26-0x00000298AC120000-0x00000298AC128000-memory.dmp

Filesize
32KB

Download
memory/3084-10-0x00007FFDDE2A0000-0x00007FFDDED61000-memory.dmp

Filesize
10.8MB

Download
memory/3084-0-0x00000298ABAF0000-0x00000298ABB12000-memory.dmp

Filesize
136KB

Download
memory/3084-13-0x00000298ABB40000-0x00000298ABB4A000-memory.dmp

Filesize
40KB

Download
memory/3084-12-0x0000029893160000-0x0000029893170000-memory.dmp

Filesize
64KB

Download
memory/3084-11-0x0000029893160000-0x0000029893170000-memory.dmp

Filesize
64KB

Download
memory/3084-31-0x00007FFDDE2A0000-0x00007FFDDED61000-memory.dmp

Filesize
10.8MB

Download
memory/3428-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3428-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads