c63eeb3e872b93ebce0ff49a3524133dc099017763c73dfe3779ee031f525053

Analysis

max time kernel
299s
max time network
33s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
27-06-2023 13:38

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General

Target

cstealer-main/README.md
Size

5KB
MD5

4c3d65af4c3a541b8260bdbcfb2e4246
SHA1

6b6df676fd2add7d0fa0ce4b04ef07c275bad687
SHA256

62e47e1c0a289846bdc1f907c4fd74963d2ec655d3002eeb71f58a26d8568bea
SHA512

8f4188b7ece197663f7bd148e03b94746bb1b202e7555fa2ccf3b65a0f172be024c5ee83f56a7efbdd19bbf10efc04c117260bf4b03d11b54ca06ee4ad2d671d
SSDEEP

96:UIL6rU6RImEUttIGI21IHVAH7ndJFK5RSQgbWI4WIbWIBQWI4JE+BWm7GwUhgZ:UXrUED17wVAH7vMMna9jQAxqM

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 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\.md	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\.md\ = "md_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419557010-3639509551-242374962-1000_CLASSES\md_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1508	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1508	AcroRd32.exe
1508	AcroRd32.exe
1508	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 1492	1760	cmd.exe	29
PID 1760 wrote to memory of 1492	1760	cmd.exe	29
PID 1760 wrote to memory of 1492	1760	cmd.exe	29
PID 1492 wrote to memory of 1508	1492	rundll32.exe	30
PID 1492 wrote to memory of 1508	1492	rundll32.exe	30
PID 1492 wrote to memory of 1508	1492	rundll32.exe	30
PID 1492 wrote to memory of 1508	1492	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\cstealer-main\README.md
1⤵
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\cstealer-main\README.md
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1492
- - 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-main\README.md"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1508

Network

MITRE ATT&CK Enterprise v6

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
f6263cc35b8f37d927fc96a04ff1c1d2

SHA1
3e00693dcd34e24189fb3f09288050a9e3c49a16

SHA256
46e81a2e4036a9ea995df117a88583582f5e070a6bd594c0e7f8977cbe305380

SHA512
61a4a341674f6f551f53faa8c7a8064ff81735e58f087e4f6a343097407d566609f654e4b27dcb0109c1c3a8c24741246fd5876bee315d15cde4421d94819613

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