4a9f863bc2b653a78885958f4062b42b1989e045728cac836374efacc066d09b

Analysis

max time kernel
49s
max time network
44s
platform
windows7_x64
resource
win7-20220414-en
submitted
13/05/2022, 16:13

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General

Target

Log4J Malware/Elknot/90ee1a8e8f0ea5085b83b8efe174674a93260b599729bf53e1b140e2acc7d26f.7z
Size

362KB
MD5

86a016b9b15f8b409b1b022069c1eb42
SHA1

fbed2f40fac21a2ef654026e37eafb82fb9f4ca5
SHA256

f43aa2f2aad2308deeb2d2f5f01280f1a544412d8805422a7714d9bf758c4fe1
SHA512

49d7c6b2b64903b149c0337a7ee7463a6e6fa8abcf3a6d2c7456f854b5f8b53535280d936a2499d803e1258b25994ed805ae90f197ba18ad81301627c7c26430

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-1-5-21-2277218442-1199762539-2004043321-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\7z_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\7z_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_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-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\7z_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000_CLASSES\.7z	rundll32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: 33	1528	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1528	AUDIODG.EXE
Token: 33	1528	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1528	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1004	AcroRd32.exe
1004	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 1764	1580	cmd.exe	29
PID 1580 wrote to memory of 1764	1580	cmd.exe	29
PID 1580 wrote to memory of 1764	1580	cmd.exe	29
PID 1764 wrote to memory of 1004	1764	rundll32.exe	30
PID 1764 wrote to memory of 1004	1764	rundll32.exe	30
PID 1764 wrote to memory of 1004	1764	rundll32.exe	30
PID 1764 wrote to memory of 1004	1764	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Log4J Malware\Elknot\90ee1a8e8f0ea5085b83b8efe174674a93260b599729bf53e1b140e2acc7d26f.7z"
1⤵
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Log4J Malware\Elknot\90ee1a8e8f0ea5085b83b8efe174674a93260b599729bf53e1b140e2acc7d26f.7z
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1764
- - 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\Log4J Malware\Elknot\90ee1a8e8f0ea5085b83b8efe174674a93260b599729bf53e1b140e2acc7d26f.7z"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1004

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x55c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1528

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

memory/1004-82-0x0000000075E51000-0x0000000075E53000-memory.dmp

Filesize
8KB

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memory/1580-54-0x000007FEFBA61000-0x000007FEFBA63000-memory.dmp

Filesize
8KB

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