cobaltstrike | b8191fcab4089c6089d8dd0bf7a81380b49dece0ec055ed15195a20a18ee06cf

General

Target

umpdc.dll
Size

391KB
MD5

1570c92c1c5f039c438295ac68ff7e82
SHA1

3ee6c1d3582361e8af4efec44b1d1420494ab728
SHA256

b41b4e32607a4e21593332da63ce1bcf9c1d43f8f6754789a43bea7428833ea4
SHA512

fbf28062d81538f814e1a615caf9993aa24e54fd0b7ff84ead7e22002bac0a4c866d334fd445d6c7844289a7310e82a0febd07d7f02536ea51d11f9f884e4992
SSDEEP

6144:JAuyRydkljgV0gy791xfB9yDAxRX9yMhklyCgk0gyWYFgdDlmZdHyHydkl9Tr0g/:JAAU8V0ZrH88Y2k0md8dHdUB0BwH

Score

10^/10

cobaltstrike 987654321 backdoor persistence trojan

Malware Config

Extracted

Family

cobaltstrike

Botnet

987654321

C2

http://45.12.253.139:443/an.js

Attributes

access_type
512
beacon_type
2048
host
45.12.253.139,/an.js
http_header1
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
http_header2
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
http_method1
GET
http_method2
POST
jitter
9472
polling_time
55991
port_number
443
sc_process32
%windir%\syswow64\dllhost.exe
sc_process64
%windir%\sysnative\dllhost.exe
state_machine
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCMEuNG3asVOp+bgSmSog10bB55R9e+aj5dF2sVbnRjA/dTkltRdDD0DdF5vJh/gURBikZ4FxqqmfqR2SPAheOzDDrYvV7ScpwPkZe8IUd/DbJmPs30ST9SGHn+eLjTQQEU+I142t7yTsO7HCKf1CTDMHfS3PNoz3V8ivNRwL1aiQIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown1
9.63976192e+08
unknown2
AAAABAAAAAIAAANxAAAAAwAAAA0AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
uri
/ch
user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/42.0.2311.135
watermark
987654321

Signatures

Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
trojan backdoor cobaltstrike
Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs

Processes:

rundll32.exe

description pid process target process

PID 4352 created 1036 4352 rundll32.exe Explorer.EXE
PID 4352 created 1036 4352 rundll32.exe Explorer.EXE

description	pid	process	target process
PID 4352 created 1036	4352	rundll32.exe	Explorer.EXE
PID 4352 created 1036	4352	rundll32.exe	Explorer.EXE

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicrosoftLibrary = "powershell.exe -noP -sta -w 1 Set-Location -Path $env:Public\\Libraries\\MicrosoftLibrary; Start-Process $env:Public\\Libraries\\MicrosoftLibrary\\RuntimeBroker.exe\""	reg.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4712 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

5112 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

4352 rundll32.exe
4352 rundll32.exe
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 2 IoCs

Processes:

rundll32.exe

pid process

4352 rundll32.exe
4352 rundll32.exe

pid	process
4712	schtasks.exe

pid	process
5112	reg.exe

pid	process
4352	rundll32.exe
4352	rundll32.exe

pid	process
4352	rundll32.exe
4352	rundll32.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

rundll32.execmd.exe

description	pid	process	target process
PID 4352 wrote to memory of 4984	4352	rundll32.exe	wermgr.exe
PID 4352 wrote to memory of 4984	4352	rundll32.exe	wermgr.exe
PID 4352 wrote to memory of 4984	4352	rundll32.exe	wermgr.exe
PID 4352 wrote to memory of 4720	4352	rundll32.exe	cmd.exe
PID 4352 wrote to memory of 4720	4352	rundll32.exe	cmd.exe
PID 4352 wrote to memory of 4712	4352	rundll32.exe	schtasks.exe
PID 4352 wrote to memory of 4712	4352	rundll32.exe	schtasks.exe
PID 4720 wrote to memory of 5112	4720	cmd.exe	reg.exe
PID 4720 wrote to memory of 5112	4720	cmd.exe	reg.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\umpdc.dll,#1
1⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of WriteProcessMemory
PID:4352

C:\Windows\System32\cmd.exe
/C reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v MicrosoftLibrary /t REG_SZ /d "powershell.exe -noP -sta -w 1 Set-Location -Path $env:Public\Libraries\MicrosoftLibrary; Start-Process $env:Public\Libraries\MicrosoftLibrary\RuntimeBroker.exe"" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4720

C:\Windows\system32\reg.exe
reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v MicrosoftLibrary /t REG_SZ /d "powershell.exe -noP -sta -w 1 Set-Location -Path $env:Public\Libraries\MicrosoftLibrary; Start-Process $env:Public\Libraries\MicrosoftLibrary\RuntimeBroker.exe"" /f
3⤵
- Adds Run key to start application
- Modifies registry key
PID:5112

C:\Windows\System32\schtasks.exe
/F /Create /TN Microsoft_Library /sc minute /MO 80 /TR "powershell.exe -WindowStyle hidden -noP -sta -w 1 Set-Location -Path $env:Public\Libraries\MicrosoftLibrary; Start-Process $env:Public\Libraries\MicrosoftLibrary\RuntimeBroker.exe
2⤵
- Creates scheduled task(s)
PID:4712

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1036

C:\windows\system32\wermgr.exe
"C:\windows\system32\wermgr.exe"
2⤵
PID:4984

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4352-132-0x00007FFA14BF0000-0x00007FFA14DE5000-memory.dmp

Filesize
2.0MB

Download
memory/4352-139-0x00007FFA14BF0000-0x00007FFA14DE5000-memory.dmp

Filesize
2.0MB

Download
memory/4712-137-0x0000000000000000-mapping.dmp

Download
memory/4720-136-0x0000000000000000-mapping.dmp

Download
memory/4984-133-0x0000000000000000-mapping.dmp

Download
memory/4984-134-0x0000024BA2570000-0x0000024BA25B4000-memory.dmp

Filesize
272KB

Download
memory/4984-135-0x0000024BA2810000-0x0000024BA288E000-memory.dmp

Filesize
504KB

Download
memory/5112-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads