0c3c48fcbb51c1d1b2d3d49e33e1f9197bcb075cf0dedba27b7e7e0d47b93550

General

Target

iebwvjjvih.dll
Size

10.6MB
MD5

825bf79bf5ea0fc0bd1ec248d247647d
SHA1

01183ae1bfc3cf4c43312b45b8de227e949dee32
SHA256

78f5872d9cee1fdebd7700529958935ae07e7ee79872ff169601fad5964e1efe
SHA512

70be186a258ae6429c20398f981bec4695ae9a595ac7c11c41b9e4d335cd1453e7beddbf4e291ac91d9d119427b474c8db4d481d935399b28e1780161ab7dfbf

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

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/844-56-0x00000000021D0000-0x000000000331E000-memory.dmp	themida
behavioral1/memory/844-58-0x00000000021D0000-0x000000000331E000-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

844 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1412 844 WerFault.exe rundll32.exe

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

pid	process
844	rundll32.exe

pid	pid_target	process	target process
1412	844	WerFault.exe	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 844	1684	rundll32.exe	rundll32.exe
PID 844 wrote to memory of 1412	844	rundll32.exe	WerFault.exe
PID 844 wrote to memory of 1412	844	rundll32.exe	WerFault.exe
PID 844 wrote to memory of 1412	844	rundll32.exe	WerFault.exe
PID 844 wrote to memory of 1412	844	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\iebwvjjvih.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\iebwvjjvih.dll,#1
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 324
3⤵
- Program crash
PID:1412

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/844-54-0x0000000000000000-mapping.dmp

Download
memory/844-55-0x0000000076431000-0x0000000076433000-memory.dmp

Filesize
8KB

Download
memory/844-56-0x00000000021D0000-0x000000000331E000-memory.dmp

Filesize
17.3MB

Download
memory/844-57-0x0000000077480000-0x0000000077600000-memory.dmp

Filesize
1.5MB

Download
memory/844-58-0x00000000021D0000-0x000000000331E000-memory.dmp

Filesize
17.3MB

Download
memory/1412-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads