8fccb69f5561ce9fba84f6e25491e9e6b238e8aef6111c4155fa6cb80fffd611

Analysis

max time kernel
46s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
26/03/2023, 16:48

Target

rehearsalunpacked.i64.7z
Size

49KB
MD5

22c961eb922bdaad4fd0419d47d4f9fe
SHA1

76404720b6fdfcd42b8e4ee313acadac1011b597
SHA256

8fccb69f5561ce9fba84f6e25491e9e6b238e8aef6111c4155fa6cb80fffd611
SHA512

bba7ceed81c9d55d1e22042cfd4824b1e4cd00cd08a5726b289a49b48addffcae258952d9fdecfac1cb8dd2781ec0077ac1dfd8405310c460ab9790ebae7f1cf
SSDEEP

1536:zzK/vQUAcUjc+59fQcgz1tiYacrYMpskzPaGyz:zzBU1Mc+59f7g/4SYTsP4

Score

3^/10

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000_CLASSES\.7z	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1812	AcroRd32.exe
1812	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 1932	1808	cmd.exe	29
PID 1808 wrote to memory of 1932	1808	cmd.exe	29
PID 1808 wrote to memory of 1932	1808	cmd.exe	29
PID 1932 wrote to memory of 1812	1932	rundll32.exe	30
PID 1932 wrote to memory of 1812	1932	rundll32.exe	30
PID 1932 wrote to memory of 1812	1932	rundll32.exe	30
PID 1932 wrote to memory of 1812	1932	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\rehearsalunpacked.i64.7z
1⤵
- Suspicious use of WriteProcessMemory
PID:1808
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\rehearsalunpacked.i64.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1932
- - 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\rehearsalunpacked.i64.7z"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1812

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact