e746f10a245a5cb3d8bf010dfa30e7de6430e1f248e88d9acbb88596d01c53be

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/02/2024, 19:49

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General

Target

Chimera-1.4/lib/filesystem_control.py
Size

1KB
MD5

f5a66c998b3bd837dce2ed5dde863a92
SHA1

4eda27b3729b41b8c0316c07051d206c71268012
SHA256

44e19922e16ea21013cbc4472e36e98edcd12a274fa661672655198b5cad59e5
SHA512

3a1e42142565847959a63886ec2ceefe505d1d451963b807875c1a0ee6f4ab39e4c9b44b5a94125e18bacce84b8b71c0ec0d22e909080411063631caceb06446

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-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\.py	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2712	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2712	AcroRd32.exe
2712	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2572	2200	cmd.exe	29
PID 2200 wrote to memory of 2572	2200	cmd.exe	29
PID 2200 wrote to memory of 2572	2200	cmd.exe	29
PID 2572 wrote to memory of 2712	2572	rundll32.exe	30
PID 2572 wrote to memory of 2712	2572	rundll32.exe	30
PID 2572 wrote to memory of 2712	2572	rundll32.exe	30
PID 2572 wrote to memory of 2712	2572	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Chimera-1.4\lib\filesystem_control.py
1⤵
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Chimera-1.4\lib\filesystem_control.py
  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\Chimera-1.4\lib\filesystem_control.py"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2712

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

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Downloads

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

Filesize
3KB

MD5
51e25c4e6ddae1a393e6b9e7f846bf94

SHA1
7cf1ef6de1b93200561ab5cea52dce0df0e01a9d

SHA256
89d686f903dfd74475e73381d5ff21d38be9f3ba213ace16ab628c2f5192b983

SHA512
f0b403f5506db32bdd7cc2d034007547aee4f03b7dd9c687534e8bd372d3e78bd644dac9cdb9871d9077b28788d1402debc78f0bb51884920e72154c528918df

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