48334de0444dd96926c17691c1e0ff236c09d347efacd5722855688f70983d4d

Analysis

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

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General

Target

cstealer.pyc
Size

75KB
MD5

44d80709f492610a377eafff857aa413
SHA1

91e53c38437797bd7e0ae5bb45a3e03144c4ec21
SHA256

2312b7c1b6704e66d44d44971fed7492d2fa9655009e3cc00c6a7a79e59d8c53
SHA512

b3b42555de7648aa4a1d6dfc94ae0503964913af7baa9528b623e5f9991a560734d43b9c88608a3cca5f13c507debfd4711951230d2932933d981b7c0b31f0d0
SSDEEP

1536:DvIiOtbI3vkwsJlYaa2Is8qRai+jjV6P4grrRheEX:DvQ29t2Is8HdgP4grrRnX

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-1-5-21-3434294380-2554721341-1919518612-1000_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

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\cstealer.pyc
1⤵
- 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.pyc
  2⤵
  - 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

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
cc64198daaa4c6f553ae543080f08efa

SHA1
ee86085a0e42f1d1f24aeb187d6862e10ffae030

SHA256
7fd02db8a1b0a3defc499ca084ab8c4eef365a8df4e402cb2ee152ae3af1f1ec

SHA512
f7ea619982986667fd1deda3f70dd405866ca38fa3fe44e5caa1bfaca63b05a34c32056b3bb5381622917c118457446fb18dbabfb53f1662ac4a5ddec42e8cf0

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