eeafcdef94d71214d03a23f7d7aa75feec16f1c00152a6598cd51859921be29b

Analysis

max time kernel
42s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
13-01-2023 16:53

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General

Target

Office 2021.7z
Size

11.2MB
MD5

f0dc586a5a538de3e346500ece1d46af
SHA1

827643662ffa8ade2cd074535c36aa535d2d4e6d
SHA256

eeafcdef94d71214d03a23f7d7aa75feec16f1c00152a6598cd51859921be29b
SHA512

79edabff8819390ef27f71820389c554f48e0b58c211a6f10ef7124ab4fa2e1681177b5c662be626aa236e17b6b66deaacd9ce5d4c16bcc5ac8efadc32f0b513
SSDEEP

196608:E9SezaLAk+qKN+eI9jhTtbY6nx7PjGy4lVE9jGXFJwFxNhPU11EvwkHBrBjIrLjY:gSeqM89jb/xj19qwFxMPRkHBJIrLgD

Score

3^/10

Malware Config

Signatures

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-1-5-21-3845472200-3839195424-595303356-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.7z	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\7z_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1712	AcroRd32.exe
1712	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1532 wrote to memory of 2028	1532	cmd.exe	28
PID 1532 wrote to memory of 2028	1532	cmd.exe	28
PID 1532 wrote to memory of 2028	1532	cmd.exe	28
PID 2028 wrote to memory of 1712	2028	rundll32.exe	29
PID 2028 wrote to memory of 1712	2028	rundll32.exe	29
PID 2028 wrote to memory of 1712	2028	rundll32.exe	29
PID 2028 wrote to memory of 1712	2028	rundll32.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Office 2021.7z"
1⤵
- Suspicious use of WriteProcessMemory
PID:1532
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Office 2021.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2028
- - 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\Office 2021.7z"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1712

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

Replay Monitor

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Downloads

memory/1532-54-0x000007FEFB751000-0x000007FEFB753000-memory.dmp

Filesize
8KB

Download
memory/1712-81-0x0000000000000000-mapping.dmp

Download
memory/1712-82-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/2028-76-0x0000000000000000-mapping.dmp

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