596263884d5474c2d3bb01238718eb30ce2c8539c99f66fa26b92171c6786c26

Analysis

max time kernel
144s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
07-07-2024 10:56

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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

flow	pid	Process
15	4524	rundll32.exe
16	4524	rundll32.exe
18	4524	rundll32.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2480455240-981575606-1030659066-1000\Control Panel\International\Geo\Nation	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe

Loads dropped DLL 1 IoCs

pid	Process
4524	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

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

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

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

pid	pid_target	Process	procid_target
4836	4524	WerFault.exe	86

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4524	rundll32.exe
4524	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 1956	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	85
PID 1104 wrote to memory of 1956	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	85
PID 1104 wrote to memory of 1956	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	85
PID 1104 wrote to memory of 4524	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	86
PID 1104 wrote to memory of 4524	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	86
PID 1104 wrote to memory of 4524	1104	6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe	86

C:\Users\Admin\AppData\Local\Temp\lab_samples\6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe
"C:\Users\Admin\AppData\Local\Temp\lab_samples\6562e2ac60afa314cd463f771fcfb8be70f947f6e2b314b0c48187eebb33dd82.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1104
- 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:1956
- 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
  PID:4524
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4524 -s 1416
    3⤵
    - Program crash
    PID:4836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4524 -ip 4524
1⤵
PID:212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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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