Malware Analysis Report

2024-08-06 07:58

Sample ID 230906-kebn1sec62
Target Note.zip
SHA256 09233ec1998287e1addfde586c10fe3493ac90fa51d2bb0ed95a5bf685f258fe
Tags
cobaltstrike 1359593325 backdoor persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

09233ec1998287e1addfde586c10fe3493ac90fa51d2bb0ed95a5bf685f258fe

Threat Level: Known bad

The file Note.zip was found to be: Known bad.

Malicious Activity Summary

cobaltstrike 1359593325 backdoor persistence trojan

Cobaltstrike

Adds Run key to start application

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2023-09-06 08:30

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral4

Detonation Overview

Submitted

2023-09-06 08:30

Reported

2023-09-06 08:33

Platform

win10-20230831-en

Max time kernel

107s

Max time network

112s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\mschost.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\mschost.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.0.1.0.0.0.0.0.0.0.0.0.0.3.f.2.0.0.1.0.0.0.8.1.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 104.193.132.51.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2023-09-06 08:30

Reported

2023-09-06 08:33

Platform

win10-20230831-en

Max time kernel

126s

Max time network

132s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\msword.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\msword.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 224.162.46.104.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-06 08:30

Reported

2023-09-06 08:33

Platform

win10-20230831-en

Max time kernel

140s

Max time network

131s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\AppvIsvSubsystems64.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\AppvIsvSubsystems64.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 168.117.168.52.in-addr.arpa udp

Files

memory/2552-0-0x00007FFBAB950000-0x00007FFBABB2B000-memory.dmp

memory/2552-2-0x00007FFBA9BC0000-0x00007FFBA9C6E000-memory.dmp

memory/2552-3-0x00007FFB8FCE0000-0x00007FFB9000E000-memory.dmp

memory/2552-5-0x00007FFBA8C60000-0x00007FFBA8EA9000-memory.dmp

memory/2552-6-0x00007FFBA9480000-0x00007FFBA9779000-memory.dmp

memory/2552-7-0x00007FFBA7E70000-0x00007FFBA7F66000-memory.dmp

memory/2552-8-0x00007FFBAB410000-0x00007FFBAB535000-memory.dmp

memory/2552-9-0x00007FFBA8EB0000-0x00007FFBA8F5A000-memory.dmp

memory/2552-10-0x00007FFBA9140000-0x00007FFBA915D000-memory.dmp

memory/2552-11-0x00007FFBA8F60000-0x00007FFBA90AA000-memory.dmp

memory/2552-12-0x00007FFBA80E0000-0x00007FFBA80FE000-memory.dmp

memory/2552-13-0x00007FFBA9220000-0x00007FFBA9247000-memory.dmp

memory/2552-14-0x00007FFBA8A20000-0x00007FFBA8BA9000-memory.dmp

memory/2552-15-0x00007FFBAB8A0000-0x00007FFBAB8CD000-memory.dmp

memory/2552-16-0x00007FFBAB2C0000-0x00007FFBAB361000-memory.dmp

memory/2552-17-0x00007FFBA9C70000-0x00007FFBAB0A7000-memory.dmp

memory/2552-18-0x00007FFBA91C0000-0x00007FFBA9211000-memory.dmp

memory/2552-19-0x00007FFBAB370000-0x00007FFBAB40D000-memory.dmp

memory/2552-20-0x00007FFBA7F70000-0x00007FFBA7FDA000-memory.dmp

memory/2552-21-0x00007FFBA7FE0000-0x00007FFBA807A000-memory.dmp

memory/2552-22-0x00007FFBA6560000-0x00007FFBA65F5000-memory.dmp

memory/2552-23-0x00007FFBA7DC0000-0x00007FFBA7DD5000-memory.dmp

memory/2552-24-0x00007FFBA7DE0000-0x00007FFBA7E2C000-memory.dmp

memory/2552-25-0x00007FFBA3CA0000-0x00007FFBA3CBB000-memory.dmp

memory/2552-26-0x00007FFBAB540000-0x00007FFBAB599000-memory.dmp

memory/2552-27-0x00007FFBA8100000-0x00007FFBA87F2000-memory.dmp

memory/2552-28-0x00007FFBAB950000-0x00007FFBABB2B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-06 08:30

Reported

2023-09-06 08:31

Platform

win10-20230831-en

Max time kernel

22s

Max time network

25s

Command Line

C:\Windows\system32\ApplicationFrameHost.exe -Embedding

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3618012334-189558363-1282585034-1000\Software\Microsoft\Windows\CurrentVersion\Run\MsWordHostService = "C:\\Users\\Admin\\AppData\\Local\\MsWordHostService\\Note .exe" c:\windows\system32\svchost.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Note .exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A c:\windows\system32\svchost.exe N/A
N/A N/A c:\windows\system32\taskhostw.exe N/A
N/A N/A C:\Windows\system32\ApplicationFrameHost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4864 wrote to memory of 2684 N/A C:\Users\Admin\AppData\Local\Temp\Note .exe c:\windows\system32\svchost.exe
PID 4864 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\Note .exe c:\windows\system32\taskhostw.exe
PID 4864 wrote to memory of 4592 N/A C:\Users\Admin\AppData\Local\Temp\Note .exe C:\Windows\system32\ApplicationFrameHost.exe
PID 4864 wrote to memory of 3768 N/A C:\Users\Admin\AppData\Local\Temp\Note .exe C:\Windows\System32\RuntimeBroker.exe

Processes

C:\Windows\system32\ApplicationFrameHost.exe

C:\Windows\system32\ApplicationFrameHost.exe -Embedding

C:\Windows\System32\RuntimeBroker.exe

C:\Windows\System32\RuntimeBroker.exe -Embedding

c:\windows\system32\taskhostw.exe

taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}

c:\windows\system32\svchost.exe

c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc

C:\Users\Admin\AppData\Local\Temp\Note .exe

"C:\Users\Admin\AppData\Local\Temp\Note .exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 communitypowersports.com udp
IT 179.43.162.63:443 communitypowersports.com tcp
IT 179.43.162.63:443 communitypowersports.com tcp

Files

memory/4864-1-0x00007FF913170000-0x00007FF91334B000-memory.dmp

memory/4864-3-0x00007FF9121D0000-0x00007FF91227E000-memory.dmp

memory/4864-4-0x00007FF8F8B70000-0x00007FF8F8E9E000-memory.dmp

memory/4864-5-0x00007FF910380000-0x00007FF9105C9000-memory.dmp

memory/4864-6-0x00007FF912280000-0x00007FF912579000-memory.dmp

memory/4864-7-0x00007FF90F8C0000-0x00007FF90F9B6000-memory.dmp

memory/4864-9-0x00007FF912810000-0x00007FF9128BA000-memory.dmp

memory/4864-8-0x00007FF913040000-0x00007FF913165000-memory.dmp

memory/4864-10-0x00007FF912B20000-0x00007FF912C6A000-memory.dmp

memory/4864-11-0x00007FF9102F0000-0x00007FF91030E000-memory.dmp

memory/4864-12-0x00007FF912E10000-0x00007FF912E37000-memory.dmp

memory/4864-13-0x00007FF90F690000-0x00007FF90F819000-memory.dmp

memory/4864-14-0x00007FF912C70000-0x00007FF912C9D000-memory.dmp

memory/4864-15-0x00007FF910CE0000-0x00007FF910D81000-memory.dmp

memory/4864-16-0x00007FF910D90000-0x00007FF9121C7000-memory.dmp

memory/4864-17-0x00007FF90F4B0000-0x00007FF90F4D5000-memory.dmp

memory/4864-18-0x00007FF9106D0000-0x00007FF910721000-memory.dmp

memory/4864-19-0x00007FF912770000-0x00007FF91280D000-memory.dmp

memory/4864-20-0x00007FF910310000-0x00007FF91037A000-memory.dmp

memory/4864-21-0x00007FF90F820000-0x00007FF90F8BA000-memory.dmp

memory/4864-22-0x00007FF90F600000-0x00007FF90F615000-memory.dmp

memory/4864-23-0x00007FF90F640000-0x00007FF90F68C000-memory.dmp

memory/4864-25-0x00007FF912FE0000-0x00007FF913039000-memory.dmp

memory/4864-24-0x00007FF90A500000-0x00007FF90A51B000-memory.dmp

memory/4864-26-0x00007FF90F9C0000-0x00007FF9100B2000-memory.dmp

memory/4864-28-0x00007FF913170000-0x00007FF91334B000-memory.dmp

memory/4864-33-0x00007FF90F8C0000-0x00007FF90F9B6000-memory.dmp

memory/4864-45-0x00007FF912770000-0x00007FF91280D000-memory.dmp

memory/2684-53-0x00007FF8F8B70000-0x00007FF8F8E9E000-memory.dmp

memory/2684-54-0x00007FF913171000-0x00007FF91327F000-memory.dmp

memory/2684-55-0x00007FF9121D1000-0x00007FF912244000-memory.dmp

memory/2684-56-0x00007FF910381000-0x00007FF910464000-memory.dmp

memory/2684-57-0x00007FF910D90000-0x00007FF9121C7000-memory.dmp

memory/2684-58-0x00007FF9106D0000-0x00007FF910721000-memory.dmp

memory/2684-59-0x00007FF90F600000-0x00007FF90F615000-memory.dmp

memory/2684-60-0x00007FF90A500000-0x00007FF90A51B000-memory.dmp

memory/2684-61-0x00007FF90F9C0000-0x00007FF9100B2000-memory.dmp

memory/2684-70-0x00000217C3A70000-0x00000217C3B1A000-memory.dmp

memory/2684-72-0x00000217C3A70000-0x00000217C3BBA000-memory.dmp

memory/2684-77-0x00000217C3A70000-0x00000217C3B2F000-memory.dmp

memory/2684-79-0x00000217C3A70000-0x00000217C3B11000-memory.dmp

memory/2684-81-0x00000217C3A70000-0x00000217C3B47000-memory.dmp

memory/4864-108-0x00007FF913170000-0x00007FF91334B000-memory.dmp

memory/2888-130-0x000002B8D5C20000-0x000002B8D5C60000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2023-09-06 08:30

Reported

2023-09-06 08:33

Platform

win10-20230831-en

Max time kernel

126s

Max time network

132s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\envsrv.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\envsrv.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 4.173.189.20.in-addr.arpa udp

Files

N/A