b27ce7a62e676cd9318bab38bd522f960c20caa4b966f2c1bf18708fe98c2e8b

General

Target

BIHBXRSIVW.dll
Size

14.5MB
MD5

9c10a526a73893354ffda1070e3c438f
SHA1

ce854ebd481c03df98625619bcc258614fc19515
SHA256

9fc52a3f3062b09ef6fe25ceeead5bcf3f80c712e8468fe887a57fbe19884b2c
SHA512

56f8cdfb10cbe024842390b7878e6cc83f4c644942d3785711310583c25499111e6427e1cb6954b17edf6db1ca9275d1e823ac5b32decfd62bddc13f1d624466
SSDEEP

393216:y1+g8B3BQ6lV7Vb3LBgTovVLRAsDEI3mtPuQTC35BeI:y1Vs3BQmBFiMVLRAsYI3OGx

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

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.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

Processes:

rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1956 rundll32.exe

pid	process
1956	rundll32.exe

Themida packer 15 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1956-54-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-55-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-56-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-58-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-57-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-59-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-60-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-61-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-62-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-63-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-64-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-66-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-67-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-85-0x0000000002240000-0x0000000004799000-memory.dmp	themida
behavioral1/memory/1956-92-0x0000000002240000-0x0000000004799000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

1956 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1704 1956 WerFault.exe rundll32.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

rundll32.exe

pid process

1956 rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

pid	process
1956	rundll32.exe

pid	pid_target	process	target process
1704	1956	WerFault.exe	rundll32.exe

pid	process
1956	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1956	1928	rundll32.exe	rundll32.exe
PID 1956 wrote to memory of 1704	1956	rundll32.exe	WerFault.exe
PID 1956 wrote to memory of 1704	1956	rundll32.exe	WerFault.exe
PID 1956 wrote to memory of 1704	1956	rundll32.exe	WerFault.exe
PID 1956 wrote to memory of 1704	1956	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\BIHBXRSIVW.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1928

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\BIHBXRSIVW.dll,#1
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1956 -s 332
3⤵
- Program crash
PID:1704

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

\Users\Admin\AppData\Local\Temp\29489780.dll

Filesize
8KB

MD5
d8f4ab8284f0fda871d6834e24bc6f37

SHA1
641948e44a1dcfd0ef68910768eb4b1ea6b49d10

SHA256
c09d0790e550694350b94ca6b077c54f983c135fab8990df5a75462804150912

SHA512
f65a916041846718306567d33273c3d0f41e0b26589cf6db46ec6c788ba0d87a708c94979d3bd0609142badca9e7129690b92169a07dcf7cd8c66698827d2fa0

Download Submit
memory/1956-62-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-61-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-58-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-57-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-63-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-60-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-56-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-54-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-59-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-64-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-66-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-67-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-69-0x0000000061E00000-0x0000000061EC1000-memory.dmp

Filesize
772KB

Download
memory/1956-85-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-55-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download
memory/1956-92-0x0000000002240000-0x0000000004799000-memory.dmp

Filesize
37.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads