bluefox | 50a20d968ac12ec915b3d12d57feea7c8ce1cbc5e0ec79c678fe2194edd34d21

General

Target

Setup.exe
Size

376.3MB
MD5

38eb2b2611ed105e0a1bb9e331abb038
SHA1

fa05ff8ecca6a42e15e1218c423316a7cad3674a
SHA256

08e4f43424b6845ea482ac01d1094d883a1d18b631669a4d9627c77dbf7acf76
SHA512

e33128a3f516c6dc903850090b546f764182a46f38563faf57029e861ae165ce45ca713c99d26a16d6cc1e3ae0d6e7c3e2c990d3b7f2a393d12243b72aa7a3a8
SSDEEP

49152:XToqRjktHN+cEUoqJCCudWoCoRXb2YP4Fu7iHeCNVrMqaXsd4AC:jTRAB7Ci5OXb2YP4Fu7+eCNVwqxd4AC

Score

10^/10

bluefox evasion stealer themida trojan

Malware Config

Signatures

BlueFox
BlueFox is an infostealer written in C# and first seen in December 2021.
stealer bluefox

BlueFox Stealer payload 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3752-133-0x0000000000DF0000-0x00000000013D3000-memory.dmp	family_bluefox
behavioral2/memory/3752-136-0x0000000000DF0000-0x00000000013D3000-memory.dmp	family_bluefox
behavioral2/memory/2384-139-0x0000000000DF0000-0x00000000013D3000-memory.dmp	family_bluefox
behavioral2/memory/2384-140-0x0000000000DF0000-0x00000000013D3000-memory.dmp	family_bluefox

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Setup.exeSetup.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ Setup.exe
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ Setup.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Setup.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Setup.exe

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:

Setup.exeSetup.exe

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

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/3752-132-0x0000000000DF0000-0x00000000013D3000-memory.dmp	themida
behavioral2/memory/3752-133-0x0000000000DF0000-0x00000000013D3000-memory.dmp	themida
behavioral2/memory/3752-136-0x0000000000DF0000-0x00000000013D3000-memory.dmp	themida
behavioral2/memory/2384-139-0x0000000000DF0000-0x00000000013D3000-memory.dmp	themida
behavioral2/memory/2384-140-0x0000000000DF0000-0x00000000013D3000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

Setup.exeSetup.exe

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

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Setup.exeSetup.exe

pid process

3752 Setup.exe
2384 Setup.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Setup.exeSetup.exe

pid process

3752 Setup.exe
3752 Setup.exe
2384 Setup.exe
2384 Setup.exe

pid	process
3752	Setup.exe
2384	Setup.exe

pid	process
3752	Setup.exe
3752	Setup.exe
2384	Setup.exe
2384	Setup.exe

C:\Users\Admin\AppData\Local\Temp\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:3752

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1576

C:\Users\Admin\AppData\Local\Temp\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:2384

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\Setup.exe.log

Filesize
426B

MD5
5a664d2a0541423c0ffa430f3d013c61

SHA1
dcfaa94b883875bdaa09fd401f4d794b4025503b

SHA256
177e204d0933dbcd56c7857018db8c8c6e49dd3e9b47f0d5e247b3a4b855a209

SHA512
f382b7de1b12f1ec2d6ed57550b04348d6b8f9844f63723946361a05be48d96c56d2d6a7f3758342cfbfe9f858cd042f00d7f2f5e1b1bbc59a90b250bd132cd9

Download Submit
memory/2384-144-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/2384-140-0x0000000000DF0000-0x00000000013D3000-memory.dmp

Filesize
5.9MB

Download
memory/2384-141-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/2384-149-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/2384-142-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/2384-148-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/2384-139-0x0000000000DF0000-0x00000000013D3000-memory.dmp

Filesize
5.9MB

Download
memory/2384-143-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/3752-137-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/3752-134-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/3752-135-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/3752-132-0x0000000000DF0000-0x00000000013D3000-memory.dmp

Filesize
5.9MB

Download
memory/3752-145-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/3752-146-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/3752-133-0x0000000000DF0000-0x00000000013D3000-memory.dmp

Filesize
5.9MB

Download
memory/3752-138-0x0000000074210000-0x00000000747C1000-memory.dmp

Filesize
5.7MB

Download
memory/3752-136-0x0000000000DF0000-0x00000000013D3000-memory.dmp

Filesize
5.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads