1c0913f43f2493177202262428a38fdcd4c275932d1b2d91cca48742c921ede9

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
02-08-2024 09:42

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General

Target

crypt32.dll.mui
Size

39KB
MD5

6180719d1dd96f5af6e8af4b162becee
SHA1

3ab145119aa1559f02347091604b0fcea3f821f9
SHA256

1c0913f43f2493177202262428a38fdcd4c275932d1b2d91cca48742c921ede9
SHA512

4449a8907e036b78749eee5bb3c030526d16249a5ecdc46906ca0b732d4fadaba4f54ffd38f38b68bb6216f574563ad26395933ea2cf86820ed4ca5d6d948c1a
SSDEEP

3::

Score

3^/10

discovery

Malware Config

Signatures

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\.mui	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\.mui\ = "mui_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000_CLASSES\mui_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2672	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2672	AcroRd32.exe
2672	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1728	1956	cmd.exe	31
PID 1956 wrote to memory of 1728	1956	cmd.exe	31
PID 1956 wrote to memory of 1728	1956	cmd.exe	31
PID 1728 wrote to memory of 2672	1728	rundll32.exe	32
PID 1728 wrote to memory of 2672	1728	rundll32.exe	32
PID 1728 wrote to memory of 2672	1728	rundll32.exe	32
PID 1728 wrote to memory of 2672	1728	rundll32.exe	32

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\crypt32.dll.mui
1⤵
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\crypt32.dll.mui
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1728
- - 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\crypt32.dll.mui"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

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
9acfacc3ac1db60f4b25cd3fe0e1a488

SHA1
810a1bd95596b666524bd0fd981e3713ddcd2cc2

SHA256
baf17272d7b121295853de7042e329c90c3e5edc190c2041d91722dd5ee280da

SHA512
239ac5640cab3be7c1f9e45ce930fb59f0618da2a513a161e4f33de9f60b38d8669ef8652c8adf14876688de92df2680742c97f4ad46c0dea9a596db485efa61

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