7d93356ce79e5c931bc2951c4284d42fc9210c8e130ffec7833463f3d7aaaa75

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04-05-2024 12:28

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General

Target

$INSTDIR"/OpalViewerUninstall.exe
Size

33KB
MD5

f6dfe8bc82bd1e1152afa6ee3fac4646
SHA1

18320868bc2fb7446f009254bb2d3cb7646b7f09
SHA256

541e22d9e35f613427ba76ed6c5b9e6302b91488496ce2995df6f4a9653b842f
SHA512

2f7e8cf844af80269beddf6f9e9cdd9fc637ba1039425c40603f24e0da1c44debff3e0506a5be939d592352426fe43f9fa66d47528a15c4b4f33d61dd2907ab5
SSDEEP

768:l1cVhpQI2EQK0iPDh84nScF15GYbWjXO3XJjJRnypHxSh:TQpQ5EP0ijnRTXJ+Ah

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1820	Au_.exe

Loads dropped DLL 4 IoCs

pid	Process
880	OpalViewerUninstall.exe
1820	Au_.exe
1820	Au_.exe
1820	Au_.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral3/files/0x0006000000017458-2.dat	nsis_installer_1
behavioral3/files/0x0006000000017458-2.dat	nsis_installer_2

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1820	Au_.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28
PID 880 wrote to memory of 1820	880	OpalViewerUninstall.exe	28

C:\Users\Admin\AppData\Local\Temp\$INSTDIR_\OpalViewerUninstall.exe
"C:\Users\Admin\AppData\Local\Temp\$INSTDIR_\OpalViewerUninstall.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:880
- C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
  "C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe" _?=C:\Users\Admin\AppData\Local\Temp\$INSTDIR_\
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: GetForegroundWindowSpam
  PID:1820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe

Filesize
33KB

MD5
f6dfe8bc82bd1e1152afa6ee3fac4646

SHA1
18320868bc2fb7446f009254bb2d3cb7646b7f09

SHA256
541e22d9e35f613427ba76ed6c5b9e6302b91488496ce2995df6f4a9653b842f

SHA512
2f7e8cf844af80269beddf6f9e9cdd9fc637ba1039425c40603f24e0da1c44debff3e0506a5be939d592352426fe43f9fa66d47528a15c4b4f33d61dd2907ab5

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