8c56c87ce3bff886a23a12f780a9aa304c92da1111f0992f1bbece295bc77ae9

Analysis

max time kernel
150s
max time network
33s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
30/06/2023, 12:45

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General

Target

Revs.class
Size

670B
MD5

04cad6596866946185789f1e9e9d5cf6
SHA1

e571436287ecad8f17419a3156a2aad9882a4bde
SHA256

8c56c87ce3bff886a23a12f780a9aa304c92da1111f0992f1bbece295bc77ae9
SHA512

2ebbde777d124f74b381d9fc013db11086fab3328eabfb185cf94d33f11f258e3cdd54b94330e8ac280a7f1d0371ad78d912e7ff744958c038f512e37894d20a

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\.class	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
744	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
744	AcroRd32.exe
744	AcroRd32.exe
744	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 1884	1664	cmd.exe	29
PID 1664 wrote to memory of 1884	1664	cmd.exe	29
PID 1664 wrote to memory of 1884	1664	cmd.exe	29
PID 1884 wrote to memory of 744	1884	rundll32.exe	30
PID 1884 wrote to memory of 744	1884	rundll32.exe	30
PID 1884 wrote to memory of 744	1884	rundll32.exe	30
PID 1884 wrote to memory of 744	1884	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Revs.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Revs.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1884
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\Revs.class"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
7949e04cf39d097eae5eecf4c44042e4

SHA1
fb766527585285d75764397ed5a285d3d57a8e35

SHA256
5c5caf790ec6818c670aa12e8355ac7a948349da4daa1448bfef3c926fcab8a1

SHA512
72098946bd0bb46cff23dc8c2bcf55d59dc864a9757d9ccc420ec42272fdee83b408a967252960187501a0021f81849e3da634a90827198ccdf35ad40fdf9678

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