fb2e430884d3a71604aeb2b8643d42a85215d9145bc7791bef3ef70c85b68ec8

Analysis

max time kernel
1565s
max time network
1566s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 19:16

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General

Target

Unconfirmed 361706.crdownload
Size

16KB
MD5

a683ce8842677a44a46c44d66a2686ae
SHA1

a3da18f801d03d659b4fa28a03e91a52b78868df
SHA256

fb2e430884d3a71604aeb2b8643d42a85215d9145bc7791bef3ef70c85b68ec8
SHA512

7bc639233698d9bf48329a8e64ea6b481dba3959c2e22c0f87b353d770bd73dfd82ce867bc0c23b07d038102d10afa173272ff2e2261726e10941d659eefad5a
SSDEEP

384:dq4F4xuFtb5+Nxt/ZtNNxuQOq/9rQdIu2/L1anjZ:7ixotWxllNFn/cIv/onN

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
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.crdownload\ = "crdownload_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\crdownload_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.crdownload	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2840	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2840	AcroRd32.exe
2840	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2636	2204	cmd.exe	29
PID 2204 wrote to memory of 2636	2204	cmd.exe	29
PID 2204 wrote to memory of 2636	2204	cmd.exe	29
PID 2636 wrote to memory of 2840	2636	rundll32.exe	30
PID 2636 wrote to memory of 2840	2636	rundll32.exe	30
PID 2636 wrote to memory of 2840	2636	rundll32.exe	30
PID 2636 wrote to memory of 2840	2636	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Unconfirmed 361706.crdownload"
1⤵
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Unconfirmed 361706.crdownload
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2636
- - 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\Unconfirmed 361706.crdownload"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2840

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
3f6bc14a37fb2b81aa62aac5de1ad556

SHA1
1e5ed2924c294ba7068b1c5b122db0bc697bda4e

SHA256
24fc686a3fd3d4500e9d1788a7968035f4f91fe87c51fc6381040a44b91591d1

SHA512
9be57f028a6a85b216b3ce76f23558fad71f81f9000c4b515145560a7f2b8c342980ed91342db477f38c298d8926391c09059df62aee41655a027f76ca01e18f

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