cobaltstrike | b8191fcab4089c6089d8dd0bf7a81380b49dece0ec055ed15195a20a18ee06cf

General

Target

RuntimeBroker.exe
Size

100KB
MD5

ba4cfe6461afa1004c52f19c8f2169dc
SHA1

ab8539ef6b2a93ff9589dec4b34a0257b6296c92
SHA256

e86870769ee6c797e09457bd99c58d9bf2303cf0193a24ef9b1222c2c3daf628
SHA512

2c5190d7609767237311260f241c619b82434ca640f396bb9710d356286844f82f320f9e05525a38707f2a52977790c0c3e2a217b36a7f0095a87c138b939af0
SSDEEP

1536:l5gC0wSKok6UAeVEBFgvozLmwCedFpQHI8PXjYlTx/2whBGE/5K5/EJD2VEUcO8h:sC+vEArBCgmejo8X/2whRJDAE2r+e

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:

RuntimeBroker.exe

description pid process target process

PID 4916 created 1032 4916 RuntimeBroker.exe Explorer.EXE
PID 4916 created 1032 4916 RuntimeBroker.exe Explorer.EXE

description	pid	process	target process
PID 4916 created 1032	4916	RuntimeBroker.exe	Explorer.EXE
PID 4916 created 1032	4916	RuntimeBroker.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
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
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run	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

1620 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

4704 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RuntimeBroker.exe

pid process

4916 RuntimeBroker.exe
4916 RuntimeBroker.exe
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 2 IoCs

Processes:

RuntimeBroker.exe

pid process

4916 RuntimeBroker.exe
4916 RuntimeBroker.exe

pid	process
1620	schtasks.exe

pid	process
4704	reg.exe

pid	process
4916	RuntimeBroker.exe
4916	RuntimeBroker.exe

pid	process
4916	RuntimeBroker.exe
4916	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

RuntimeBroker.execmd.exe

description	pid	process	target process
PID 4916 wrote to memory of 4812	4916	RuntimeBroker.exe	wermgr.exe
PID 4916 wrote to memory of 4812	4916	RuntimeBroker.exe	wermgr.exe
PID 4916 wrote to memory of 4812	4916	RuntimeBroker.exe	wermgr.exe
PID 4916 wrote to memory of 2488	4916	RuntimeBroker.exe	cmd.exe
PID 4916 wrote to memory of 2488	4916	RuntimeBroker.exe	cmd.exe
PID 4916 wrote to memory of 1620	4916	RuntimeBroker.exe	schtasks.exe
PID 4916 wrote to memory of 1620	4916	RuntimeBroker.exe	schtasks.exe
PID 2488 wrote to memory of 4704	2488	cmd.exe	reg.exe
PID 2488 wrote to memory of 4704	2488	cmd.exe	reg.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1032

C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
2⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of WriteProcessMemory
PID:4916

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
3⤵
- Suspicious use of WriteProcessMemory
PID:2488

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
4⤵
- Adds Run key to start application
- Modifies registry key
PID:4704

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
3⤵
- Creates scheduled task(s)
PID:1620

C:\windows\system32\wermgr.exe
"C:\windows\system32\wermgr.exe"
2⤵
PID:4812

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/1620-137-0x0000000000000000-mapping.dmp

Download
memory/2488-136-0x0000000000000000-mapping.dmp

Download
memory/4704-138-0x0000000000000000-mapping.dmp

Download
memory/4812-133-0x0000000000000000-mapping.dmp

Download
memory/4812-134-0x00000125264D0000-0x0000012526514000-memory.dmp

Filesize
272KB

Download
memory/4812-135-0x0000012526800000-0x000001252687E000-memory.dmp

Filesize
504KB

Download
memory/4916-132-0x00007FF82E030000-0x00007FF82E225000-memory.dmp

Filesize
2.0MB

Download
memory/4916-139-0x00007FF82E030000-0x00007FF82E225000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads