841a98464457d2fceff8a35e6b575b1e5e0681f7232cb3c2b94c698e38960a25

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25-03-2024 21:05

240325-zxdnnahe48 3

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25-03-2024 20:56

25-03-2024 20:51

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Analysis

max time kernel
18s
max time network
16s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25-03-2024 20:51

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General

Target

Prefetch/CMDINSTALL.EXE-71D8CC25.pf
Size

16KB
MD5

3d02b48afe12a4015b7a70fa95d5bed6
SHA1

45482bcb900080289b0e33522c98670df0a8e164
SHA256

227cb00649f3a75666dbcbaa531cf422b40a8f56a479911b728ea22cbde0e6be
SHA512

8cb40cbddfd9122107341652dd47c25caeb0b9ca16bcfec7bd97c07711928d65a555d28e19c92c95f9c4a4d5032c0dbed1d09ca56df009573a8f4f2eb45f4046
SSDEEP

384:CrX0Sgf9//q5mG55sui6v1WDvtNCG0r48nrK4YW4w:CrX0SgB/m55Nie1pG583

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 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.pf\ = "pf_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.pf	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\pf_auto_file\	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2724	AcroRd32.exe
2724	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 292 wrote to memory of 2572	292	cmd.exe	29
PID 292 wrote to memory of 2572	292	cmd.exe	29
PID 292 wrote to memory of 2572	292	cmd.exe	29
PID 2572 wrote to memory of 2724	2572	rundll32.exe	30
PID 2572 wrote to memory of 2724	2572	rundll32.exe	30
PID 2572 wrote to memory of 2724	2572	rundll32.exe	30
PID 2572 wrote to memory of 2724	2572	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Prefetch\CMDINSTALL.EXE-71D8CC25.pf
1⤵
- Suspicious use of WriteProcessMemory
PID:292
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Prefetch\CMDINSTALL.EXE-71D8CC25.pf
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2572
- - 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\Prefetch\CMDINSTALL.EXE-71D8CC25.pf"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:2724

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

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

Filesize
3KB

MD5
6b32f6136d7bba1be3a5afaa65cd5d68

SHA1
e91915a548351d4b6db97362db8872d74ddb62d2

SHA256
094e7e0fca6f1dc2a62a76a99f98687bac5e96b59137963b7470890c4f5dd95c

SHA512
b1e2b0581766ce5de8f5996560ce97b6728364fce08eeae0df86a427f697dfce1b435202c1e384e7f39dd23fcf75d676df36c498394900aba9c92b746ebe76e3

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