60fd532a312154ace7b2a8c06299b576c691c7b6355c691fe4abaca53edf957b

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26-03-2024 13:11

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General

Target

cstealer.pyc
Size

67KB
MD5

23563d0708832f0ee177f36f2c1b610e
SHA1

4641b6ce3af6d9ca8c89848b3aa3e6a505cf9959
SHA256

02f2a7c06f214fc99f2591185645edab1fde2b7930b1a997b98b0dc397728051
SHA512

f9a1712a0fee47fecfc22013b0094f14fde9f861230bdf8f91c6587ad4e753b209a6e2736e3c1c756362b28d80f697fd858130de7c39cf2cbddc9b89d2b9455e
SSDEEP

1536:l0xqOg+xpqBJlMstbo88jLQQcXf9qS0VL+LRheB:lqr/+bo88PiXX0L+LRc

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-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.pyc	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2752	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2752	AcroRd32.exe
2752	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2408	2180	cmd.exe	29
PID 2180 wrote to memory of 2408	2180	cmd.exe	29
PID 2180 wrote to memory of 2408	2180	cmd.exe	29
PID 2408 wrote to memory of 2752	2408	rundll32.exe	30
PID 2408 wrote to memory of 2752	2408	rundll32.exe	30
PID 2408 wrote to memory of 2752	2408	rundll32.exe	30
PID 2408 wrote to memory of 2752	2408	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\cstealer.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:2180
- 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 use of WriteProcessMemory
  PID:2408
- - 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:2752

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
3bd527bf8d42db1cb384fda61205317d

SHA1
72fb0649b6c198862c778fcdb72439e487d12a03

SHA256
6a7322698c7e685e92a0086c4f4359c2d842ab9f9da23c76545700c3626b74e1

SHA512
1ad57c63a37a832e72ff9ba6fc17718f9d454be8119a099c0e170b63fefa85ca1eb928473627c5a24c473751d612b0caa3ac3d0130b232cc3674b4327db7b6ed

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