a102b644fd134778f28e1105e4645e84ff4d05687351990de90ae27a89f0513b

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 06:44

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General

Target
$TEMP/mode/Thumbs.db/intern/PermCalc.exe
Size 28KB
Sample240531-hhlbhsbb66
SHA256 57f248daa64d83c215189a3d38b9692f93125273ee046328febe33e69df01ded
MD5 c2efc9fcbbf2d6952110fea17841b71e
SHA1 4860494e79e88beacb0155584056699adb073f44
SHA512 5aa7033b6b9de91c309554b354d47d63c08d15d4d5ebe4ac6e98e059873c74149c869dea731a2754ca31dee526f27221cd210555693e5f6886cc26d271f39ae0
SSDEEP 384:xL8f6BoGrFTth3SAUnZV7OKAyXSKglWYbW:98iBoGxtSHqKgB
MD5 SHA1 SHA512 SSDEEP

Score

1^/10

Malware Config

Signatures

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeRestorePrivilege	2616	dw20.exe
Token: SeBackupPrivilege	2616	dw20.exe
Token: SeBackupPrivilege	2616	dw20.exe
Token: SeBackupPrivilege	2616	dw20.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1328 wrote to memory of 2616	1328	PermCalc.exe	84
PID 1328 wrote to memory of 2616	1328	PermCalc.exe	84
PID 1328 wrote to memory of 2616	1328	PermCalc.exe	84

C:\Users\Admin\AppData\Local\Temp\$TEMP\mode\Thumbs.db\intern\PermCalc.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\mode\Thumbs.db\intern\PermCalc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 828
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:2616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1328-0-0x0000000074722000-0x0000000074723000-memory.dmp

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memory/1328-1-0x0000000074720000-0x0000000074CD1000-memory.dmp

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memory/1328-2-0x0000000074720000-0x0000000074CD1000-memory.dmp

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memory/1328-9-0x0000000074720000-0x0000000074CD1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads