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Analysis
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max time kernel
120s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
10/07/2024, 17:18
Behavioral task
behavioral1
Sample
installer.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
installer.exe
Resource
win10v2004-20240709-en
Behavioral task
behavioral3
Sample
cstealer.pyc
Resource
win7-20240704-en
Behavioral task
behavioral4
Sample
cstealer.pyc
Resource
win10v2004-20240709-en
General
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Target
cstealer.pyc
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Size
75KB
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MD5
44d80709f492610a377eafff857aa413
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SHA1
91e53c38437797bd7e0ae5bb45a3e03144c4ec21
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SHA256
2312b7c1b6704e66d44d44971fed7492d2fa9655009e3cc00c6a7a79e59d8c53
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SHA512
b3b42555de7648aa4a1d6dfc94ae0503964913af7baa9528b623e5f9991a560734d43b9c88608a3cca5f13c507debfd4711951230d2932933d981b7c0b31f0d0
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SSDEEP
1536:DvIiOtbI3vkwsJlYaa2Is8qRai+jjV6P4grrRheEX:DvQ29t2Is8HdgP4grrRnX
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 9 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\.pyc rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_Classes\Local Settings rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\.pyc\ = "pyc_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file\shell\Read rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000_CLASSES\pyc_auto_file\shell\Read\command rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 2 IoCs
pid Process 2540 rundll32.exe 2556 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2556 AcroRd32.exe 2556 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2624 wrote to memory of 2540 2624 cmd.exe 31 PID 2624 wrote to memory of 2540 2624 cmd.exe 31 PID 2624 wrote to memory of 2540 2624 cmd.exe 31 PID 2540 wrote to memory of 2556 2540 rundll32.exe 32 PID 2540 wrote to memory of 2556 2540 rundll32.exe 32 PID 2540 wrote to memory of 2556 2540 rundll32.exe 32 PID 2540 wrote to memory of 2556 2540 rundll32.exe 32
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\cstealer.pyc1⤵
- Suspicious use of WriteProcessMemory
PID:2624 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\cstealer.pyc2⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2540 -
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\cstealer.pyc"3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2556
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3KB
MD5cc64198daaa4c6f553ae543080f08efa
SHA1ee86085a0e42f1d1f24aeb187d6862e10ffae030
SHA2567fd02db8a1b0a3defc499ca084ab8c4eef365a8df4e402cb2ee152ae3af1f1ec
SHA512f7ea619982986667fd1deda3f70dd405866ca38fa3fe44e5caa1bfaca63b05a34c32056b3bb5381622917c118457446fb18dbabfb53f1662ac4a5ddec42e8cf0