9d0eef3560fd3b6f9207a21206c4f4337b07bff2cf082869c87bdc1ddd6d2e89

Analysis

max time kernel
1561s
max time network
1562s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
21/05/2024, 14:49 UTC

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General

Target

Osu.7z
Size

3.7MB
MD5

925d19382afe84113af3255a66d024d8
SHA1

dae8a69db43980e2335503a4a0a7d30576bed181
SHA256

9d0eef3560fd3b6f9207a21206c4f4337b07bff2cf082869c87bdc1ddd6d2e89
SHA512

1a6cf9bdc5666a4a9b0b4e4fc9d46eaecabf572a757fa9abb4faf24413abde504fef829660a0dd3a6681ab6c28f9032875c3c22a653f66939412ed853175ca45
SSDEEP

98304:00xdEVRkgh/ZxjuutKhnM5IYpu99zvp8sPhy//oSuks:00fq/mhnMqYp6B8sJ4Ts

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-1-5-21-3627615824-4061627003-3019543961-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.7z	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\7z_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
1764	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1764	AcroRd32.exe
1764	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 2660	2924	cmd.exe	29
PID 2924 wrote to memory of 2660	2924	cmd.exe	29
PID 2924 wrote to memory of 2660	2924	cmd.exe	29
PID 2660 wrote to memory of 1764	2660	rundll32.exe	30
PID 2660 wrote to memory of 1764	2660	rundll32.exe	30
PID 2660 wrote to memory of 1764	2660	rundll32.exe	30
PID 2660 wrote to memory of 1764	2660	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Osu.7z
1⤵
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Osu.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2660
- - 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\Osu.7z"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1764

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
b5152f7dc1808dda82fe43fb2c49df8b

SHA1
c96a0dc1e0814948317559f2c778b48b92f49eb8

SHA256
03e1c67ad758d24516eaf561c2699661be0c61c573f62c9ecf2c208933f4e190

SHA512
3888e76b20b40f77a6908247d5e59ea0efe6bcf5ba9399f9242ff83f124e519be36d9f1b83ae8a405df38d5ed8157f7897f6cedced06924aa309d64ca0a950dd

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