e394b31b5d3530ba36cc348fab8ddf79cbe635b81c7991e93d1dec14c7076a68

Analysis

max time kernel
17s
max time network
22s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
07/09/2024, 19:49

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General

Target

updater.exe
Size

6.1MB
MD5

be00675212ecb96e7603354c84387ba0
SHA1

ee4bfb93dea04a35e15e95dbcb096f66ffa8f907
SHA256

e394b31b5d3530ba36cc348fab8ddf79cbe635b81c7991e93d1dec14c7076a68
SHA512

bd0c5c530d162c70a440a471bad345c2d1d94caf6cfeb3c3a0ae38805eb68664a8a8d349b6d867747bcdc2416da39a16efd36f29ae83f04314dc06c4097d73b4
SSDEEP

98304:gJIMtJix6CC7mR6jatnIC6JCfoYFu/I36GU8seJBHh9NwQYENY1yIXXrjmjyirxc:3f3C7mRP9hPfXE/5GUJWKQKFrj0rxc

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__	updater.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\VideoBiosVersion	updater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	updater.exe

Executes dropped EXE 1 IoCs

pid	Process
1616	loader.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/3608-6-0x0000000140000000-0x0000000140E52000-memory.dmp	themida
behavioral1/memory/3608-7-0x0000000140000000-0x0000000140E52000-memory.dmp	themida
behavioral1/files/0x000200000002a06a-15.dat	themida
behavioral1/memory/3608-21-0x0000000140000000-0x0000000140E52000-memory.dmp	themida
behavioral1/memory/1616-23-0x0000000140000000-0x00000001436EF000-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	updater.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3608	updater.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\silence\loader.exe	updater.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3608	updater.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3608	updater.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 1616	3608	updater.exe	84
PID 3608 wrote to memory of 1616	3608	updater.exe	84

C:\Users\Admin\AppData\Local\Temp\updater.exe
"C:\Users\Admin\AppData\Local\Temp\updater.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
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Program Files\silence\loader.exe
  "C:\Program Files\silence\loader.exe"
  2⤵
  - Executes dropped EXE
  PID:1616

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2164

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

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Downloads

C:\Program Files\silence\loader.exe

Filesize
21.6MB

MD5
1f83dc0529085fcd339fc0fd5537773d

SHA1
260a92dcbab701b65218b4f0f5539984cc19481f

SHA256
d18edfdf943460fa7ee4a17543502d914fa3bcf71bead34734aa73e5de48258e

SHA512
a47f72f8a4b82d7b90c90a7a251985cac6a78224388510f510de4e0e2219167809c313ec4b52b4742d11df61dfe77a7700ca66464d0dc553e950820de5200942

Download Submit
memory/1616-23-0x0000000140000000-0x00000001436EF000-memory.dmp

Filesize
54.9MB

Download
memory/3608-3-0x00007FFA23B10000-0x00007FFA23BCD000-memory.dmp

Filesize
756KB

Download
memory/3608-0-0x0000000140000000-0x0000000140E52000-memory.dmp

Filesize
14.3MB

Download
memory/3608-4-0x00007FFA23B10000-0x00007FFA23BCD000-memory.dmp

Filesize
756KB

Download
memory/3608-6-0x0000000140000000-0x0000000140E52000-memory.dmp

Filesize
14.3MB

Download
memory/3608-7-0x0000000140000000-0x0000000140E52000-memory.dmp

Filesize
14.3MB

Download
memory/3608-8-0x0000000140000000-0x0000000140E52000-memory.dmp

Filesize
14.3MB

Download
memory/3608-9-0x00007FFA23B2A000-0x00007FFA23B2B000-memory.dmp

Filesize
4KB

Download
memory/3608-2-0x00007FFA23B10000-0x00007FFA23BCD000-memory.dmp

Filesize
756KB

Download
memory/3608-22-0x00007FFA23B10000-0x00007FFA23BCD000-memory.dmp

Filesize
756KB

Download
memory/3608-21-0x0000000140000000-0x0000000140E52000-memory.dmp

Filesize
14.3MB

Download
memory/3608-1-0x00007FFA23B2A000-0x00007FFA23B2B000-memory.dmp

Filesize
4KB

Download