45b98eb93ac47dc935eef58720a7b84e952eda334b4f24315282d938bbaf49c1

Analysis

max time kernel
291s
max time network
130s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01-08-2024 07:59

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General

Target

BearFlix\BearFlix.exe
Size

393KB
MD5

219cc860813f9cdfad1e7e45a19da1a4
SHA1

e7d27e4b0441283acc06b8270de41918dbd9ec7a
SHA256

1422481834c140a96979b1618db835231b4e67475854c9a200fa08f0cdb02371
SHA512

c9d7419db07c3d6820ab5dddbcfdca1ba787e6d4777248354d4f596987f9eb9bdd301ab6a102a95469c8031bf259cd9e0f58fca64df30d01861150a952574fc4
SSDEEP

6144:GfUXZAwseFnp0Ak27gU6bF8ViOAOupdDCXPaKFh:GsJrrFnphE78IOQWXPaEh

Score

9^/10

agilenet discovery evasion themida trojan

Malware Config

Signatures

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

winsrvhost.exestrip.cfg

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	winsrvhost.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	strip.cfg

Checks BIOS information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

winsrvhost.exestrip.cfg

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	winsrvhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	winsrvhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	strip.cfg
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	strip.cfg

Executes dropped EXE 2 IoCs

Processes:

UserOOOBE.exewinsrvhost.exe

pid process

2456 UserOOOBE.exe
1924 winsrvhost.exe
Loads dropped DLL 5 IoCs

Processes:

BearFlix.exestrip.cfg

pid process

2912 BearFlix.exe
2912 BearFlix.exe
2912 BearFlix.exe
2912 BearFlix.exe
2356 strip.cfg

pid	process
2456	UserOOOBE.exe
1924	winsrvhost.exe

pid	process
2912	BearFlix.exe
2912	BearFlix.exe
2912	BearFlix.exe
2912	BearFlix.exe
2356	strip.cfg

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

Processes:

resource	yara_rule
behavioral1/memory/2356-27-0x0000000000310000-0x0000000000A22000-memory.dmp	agile_net

Themida packer 15 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
C:\ProgramData\winsrvhost\winsrvhost.exe	themida
behavioral1/memory/1924-26-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-25-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-24-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-23-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-22-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-21-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-20-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/1924-19-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
C:\Users\Admin\AppData\Local\Temp\2e082fe2-809f-4139-90cf-9dcb3fb2c4b1\AgileDotNetRT.dll	themida
behavioral1/memory/2356-34-0x000000006FC40000-0x0000000070259000-memory.dmp	themida
behavioral1/memory/2356-35-0x000000006FC40000-0x0000000070259000-memory.dmp	themida
behavioral1/memory/2356-36-0x000000006FC40000-0x0000000070259000-memory.dmp	themida
behavioral1/memory/1924-39-0x00000000012C0000-0x000000000171B000-memory.dmp	themida
behavioral1/memory/2356-38-0x000000006FC40000-0x0000000070259000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

winsrvhost.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA winsrvhost.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

strip.cfg

pid process

2356 strip.cfg
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2808 2356 WerFault.exe strip.cfg

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

pid	process
2356	strip.cfg

pid	pid_target	process	target process
2808	2356	WerFault.exe	strip.cfg

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

winsrvhost.exestrip.cfgBearFlix.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winsrvhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	strip.cfg
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BearFlix.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

BearFlix.exestrip.cfg

description	pid	process	target process
PID 2912 wrote to memory of 2456	2912	BearFlix.exe	UserOOOBE.exe
PID 2912 wrote to memory of 2456	2912	BearFlix.exe	UserOOOBE.exe
PID 2912 wrote to memory of 2456	2912	BearFlix.exe	UserOOOBE.exe
PID 2912 wrote to memory of 2456	2912	BearFlix.exe	UserOOOBE.exe
PID 2912 wrote to memory of 2356	2912	BearFlix.exe	strip.cfg
PID 2912 wrote to memory of 2356	2912	BearFlix.exe	strip.cfg
PID 2912 wrote to memory of 2356	2912	BearFlix.exe	strip.cfg
PID 2912 wrote to memory of 2356	2912	BearFlix.exe	strip.cfg
PID 2912 wrote to memory of 1924	2912	BearFlix.exe	winsrvhost.exe
PID 2912 wrote to memory of 1924	2912	BearFlix.exe	winsrvhost.exe
PID 2912 wrote to memory of 1924	2912	BearFlix.exe	winsrvhost.exe
PID 2912 wrote to memory of 1924	2912	BearFlix.exe	winsrvhost.exe
PID 2356 wrote to memory of 2808	2356	strip.cfg	WerFault.exe
PID 2356 wrote to memory of 2808	2356	strip.cfg	WerFault.exe
PID 2356 wrote to memory of 2808	2356	strip.cfg	WerFault.exe
PID 2356 wrote to memory of 2808	2356	strip.cfg	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\BearFlix\BearFlix.exe
"C:\Users\Admin\AppData\Local\Temp\BearFlix\BearFlix.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2912

C:\ProgramData\UserOOOBE\UserOOOBE.exe
C:\ProgramData\\UserOOOBE\\UserOOOBE.exe ,.
2⤵
- Executes dropped EXE
PID:2456

C:\Users\Admin\AppData\Local\Temp\BearFlix\strip.cfg
strip.cfg
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 652
3⤵
- Program crash
PID:2808

C:\ProgramData\winsrvhost\winsrvhost.exe
C:\ProgramData\\winsrvhost\\winsrvhost.exe fUhKJYNVptKDkRc4TZ8i2qrNArpfQ0KW3bLpDrGQYVEtTff7fRL4tmxadfEipHsp
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
PID:1924

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\winsrvhost\winsrvhost.exe

Filesize
3.0MB

MD5
a553208ea4a57f1334669fe1e80113b7

SHA1
509aebd8384adb5f0d5f37dd3dd2b799ca7ddae6

SHA256
c868a800bef638fd579202534fa763a584cf78a01447afc89908ed1bae308ace

SHA512
08765ce1ed9d095527b469495b2138e6446c9034916f4030e7c02c43ea7b39708c1d3cd4f35c9df156633e77cdcb702258f7d627c028c902ac3f450dd0643eef

Download Submit
C:\Users\Admin\AppData\Local\Temp\2e082fe2-809f-4139-90cf-9dcb3fb2c4b1\AgileDotNetRT.dll

Filesize
2.3MB

MD5
105e678e6ee84e0fa7fbe34df1f9639c

SHA1
17e4d775f4405e3a81a793b5bf775e9c95da5af9

SHA256
4ef4551d44fde6e46c470314b0b89f6418a54eee3f1ad9eb7456b2a20e3065a2

SHA512
3a15a2f188a4f572923d1999a77ef6d14b243d1c0e3a4442b5a6825756b93b40e2c6197d106df62ae3b427c62ff6b21fc2fe8181a3b6709e9991f1ddd36e5689

Download Submit
\ProgramData\UserOOOBE\UserOOOBE.exe

Filesize
1.6MB

MD5
939712a4d4341fb67c0214621a78fca7

SHA1
53225cb2d07e8131c9fdb086a70a81cd41f588ea

SHA256
f594ff49ea0a51dc4a76609291b7c3e44fcc92789378f899349609407ac55b61

SHA512
f9cd9997394dae980b99018902e347a48b4eab44041e88bad6fc3d10c173b31cea44b0202e7233b1dc934c102c27f1ce5662a01e53b1b0f80197c9c73bb24144

Download Submit
memory/1924-25-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-19-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-24-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-23-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-22-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-21-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-20-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-26-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/1924-39-0x00000000012C0000-0x000000000171B000-memory.dmp

Filesize
4.4MB

Download
memory/2356-34-0x000000006FC40000-0x0000000070259000-memory.dmp

Filesize
6.1MB

Download
memory/2356-35-0x000000006FC40000-0x0000000070259000-memory.dmp

Filesize
6.1MB

Download
memory/2356-36-0x000000006FC40000-0x0000000070259000-memory.dmp

Filesize
6.1MB

Download
memory/2356-37-0x0000000074BA0000-0x0000000074C20000-memory.dmp

Filesize
512KB

Download
memory/2356-27-0x0000000000310000-0x0000000000A22000-memory.dmp

Filesize
7.1MB

Download
memory/2356-38-0x000000006FC40000-0x0000000070259000-memory.dmp

Filesize
6.1MB

Download
memory/2912-13-0x00000000002C0000-0x00000000002D0000-memory.dmp

Filesize
64KB

Download