f8e145b1e3ac2efc14f773586317dd40e7988afa3abbc7dfa494a1bf17a43e4b

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
02/09/2023, 04:09

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General

Target

b.7z
Size

282KB
MD5

7339c027be95777e1e3618ee9e4ca925
SHA1

2f03d5bb91c32a7a314d496650793a35ceebcc43
SHA256

f8e145b1e3ac2efc14f773586317dd40e7988afa3abbc7dfa494a1bf17a43e4b
SHA512

7a99515cfa1d1984d8f34ff673a8bcf766e0d9e37ca1dde8744698f84191ad347e9a5b531b8f25e0c2320b77099413f5550f167c54230dd755d6d64bab82618f
SSDEEP

6144:hCBq1lw73Uskvjo1/uz5QaVhMZyLF4w7GFYE0GZ/WMPp:hPlwghvj0AQseZyJV7GFY7GZ/Rx

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-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\.7z	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_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-1-5-21-686452656-3203474025-4140627569-1000_CLASSES\7z_auto_file\	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2776	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2776	AcroRd32.exe
2776	AcroRd32.exe
2776	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 2952	2948	cmd.exe	29
PID 2948 wrote to memory of 2952	2948	cmd.exe	29
PID 2948 wrote to memory of 2952	2948	cmd.exe	29
PID 2952 wrote to memory of 2776	2952	rundll32.exe	30
PID 2952 wrote to memory of 2776	2952	rundll32.exe	30
PID 2952 wrote to memory of 2776	2952	rundll32.exe	30
PID 2952 wrote to memory of 2776	2952	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\b.7z
1⤵
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\b.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2952
- - 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\b.7z"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2776

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

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
c406c0010554efa4593963c10f12cc49

SHA1
a4cf12852b70c2dccd97c50b09e0b17821777a58

SHA256
2a4577bb640aa3a20397e4903b09566f573e835690340e0cdc103dd8fbb6eabe

SHA512
d5cb0a9ce0b4ea13ea280e8812619a40bc9c7fd8a308c1459f7ea5bf6a9bc06861104f34b0d4871318848f4c48bd1eba0462e363c56cee5b84caa186166cbd61

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