645e274fec3723d065308f9b16b33392ed7f51fbd5ffc3c00806c2efafb08b65

Analysis

max time kernel
102s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
19-07-2024 11:34

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General

Target

internal/extensions/CMemoryBlock.lua
Size

141B
MD5

5061c2e693ba5c470b76fd4b2ce7be24
SHA1

ec721428eea0d08bf501cc428cea046e3774152e
SHA256

400bc118e420ab428675226e08a2cba5e0bd4121834168a5fb9b8004502ae3f0
SHA512

c0168746854c5ddc3496dd9a2b5ac97b62d0eec2fc6a4c7fa8ef0676b08f753525bceefdd0ac9040f1105c83544b583ef47ff0ab1bbed09d0b054122087d3c91

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-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\.lua\ = "lua_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\.lua	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000_CLASSES\lua_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2828	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2828	AcroRd32.exe
2828	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 2400	2548	cmd.exe	30
PID 2548 wrote to memory of 2400	2548	cmd.exe	30
PID 2548 wrote to memory of 2400	2548	cmd.exe	30
PID 2400 wrote to memory of 2828	2400	rundll32.exe	31
PID 2400 wrote to memory of 2828	2400	rundll32.exe	31
PID 2400 wrote to memory of 2828	2400	rundll32.exe	31
PID 2400 wrote to memory of 2828	2400	rundll32.exe	31

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\internal\extensions\CMemoryBlock.lua
1⤵
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\internal\extensions\CMemoryBlock.lua
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2400
- - 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\internal\extensions\CMemoryBlock.lua"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2828

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
7c1af9eb452ad88f9453874791ebf5da

SHA1
d950f77ae14cd383dea5e0fc8346dffef72e6075

SHA256
86a15509a0777173d91783fecbd6c7e80257a21a211abf02b1a35680e1ff2b12

SHA512
57371f4d84c4a2749ea2a403ea1fc2e3d8295198bee43a24debb4df8fee5a7017b130760a3c3cb5c3c98d84fe1ed03fa54a088fd614b9c4eb75dd2319b5cd2c1

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