b11afbe3b821ff6e6b6ea3c74058b7c2b10cbf5dfe1da52befcad7b85c032a15

Analysis

max time kernel
138s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
07/01/2024, 03:06

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General

Target

Fragment.exe
Size

3.6MB
MD5

96aeac278f4c16b5545d8264b9d9103e
SHA1

6d9e1db1fac6aa99eb2ff60be514f7c045b64d67
SHA256

b11afbe3b821ff6e6b6ea3c74058b7c2b10cbf5dfe1da52befcad7b85c032a15
SHA512

8da68eff7cf8565fb55f95da129bdc0ad3673de3a1707988d702be955279362577092848fa93f90f0b4eb2fba8680f431d6c6f43578163279ffa3d91c6dcaa66
SSDEEP

98304:mJK2vINDgbGwDD0kSWh4KeapPPCufYKA0tC:mJKrVtwca49ySz

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Fragment.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Fragment.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Fragment.exe

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/3356-0-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida
behavioral1/memory/3356-1-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida
behavioral1/memory/3356-2-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida
behavioral1/memory/3356-3-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida
behavioral1/memory/3356-4-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida
behavioral1/memory/3356-5-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Fragment.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3356	Fragment.exe
3356	Fragment.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3356 wrote to memory of 1484	3356	Fragment.exe	94
PID 3356 wrote to memory of 1484	3356	Fragment.exe	94
PID 1484 wrote to memory of 1336	1484	cmd.exe	99
PID 1484 wrote to memory of 1336	1484	cmd.exe	99
PID 1484 wrote to memory of 3556	1484	cmd.exe	97
PID 1484 wrote to memory of 3556	1484	cmd.exe	97
PID 1484 wrote to memory of 4100	1484	cmd.exe	96
PID 1484 wrote to memory of 4100	1484	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\Fragment.exe
"C:\Users\Admin\AppData\Local\Temp\Fragment.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3356
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Fragment.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\system32\find.exe
    find /i /v "certutil"
    3⤵
    PID:4100
- - C:\Windows\system32\find.exe
    find /i /v "md5"
    3⤵
    PID:3556
- - C:\Windows\system32\certutil.exe
    certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Fragment.exe" MD5
    3⤵
    PID:1336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3356-0-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3356-1-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3356-2-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3356-3-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3356-4-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download
memory/3356-5-0x00007FF7A4630000-0x00007FF7A4DE0000-memory.dmp

Filesize
7.7MB

Download