0228149fc99d9323a5f2cfe773e1fac2652c043b1e591d4270472b08df7d85e8

Analysis

max time kernel
135s
max time network
24s
platform
windows7_x64
resource
win7-en-20211208
submitted
05/02/2022, 15:32

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General

Target
1f766ea9e592fb25e132e7c956321133.exe
Size 5.6MB
Sample220205-symvdsdaem
SHA256 0228149fc99d9323a5f2cfe773e1fac2652c043b1e591d4270472b08df7d85e8
MD5 1f766ea9e592fb25e132e7c956321133
SHA1 288d1bedde713c4cd3b52b298027da219c63e8de
SHA512 5f241fa2c4c25e8f494b5ed47229e4d80d7f47cf2e5bb721547c0fa4dd1b30e648e0eaee951d5c3f67bb70798a97fa35f94a60e230e65b28ef8bf75bffc1a7f1
MD5 SHA1 SHA512

Score

9^/10

evasion themida trojan

Malware Config

Signatures

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Executes dropped EXE 2 IoCs

pid	Process
288	services.exe
1060	sihost64.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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	1f766ea9e592fb25e132e7c956321133.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1f766ea9e592fb25e132e7c956321133.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	services.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	services.exe

Loads dropped DLL 2 IoCs

pid	Process
656	cmd.exe
288	services.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1584-55-0x0000000000400000-0x0000000000F2C000-memory.dmp	themida
behavioral1/files/0x000700000001267c-62.dat	themida
behavioral1/files/0x000700000001267c-63.dat	themida
behavioral1/files/0x000700000001267c-64.dat	themida
behavioral1/memory/288-65-0x0000000000400000-0x0000000000F2C000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	services.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	1f766ea9e592fb25e132e7c956321133.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1584	1f766ea9e592fb25e132e7c956321133.exe
288	services.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1584	1f766ea9e592fb25e132e7c956321133.exe
288	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1584	1f766ea9e592fb25e132e7c956321133.exe
Token: SeDebugPrivilege	288	services.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 1140	1584	1f766ea9e592fb25e132e7c956321133.exe	28
PID 1584 wrote to memory of 1140	1584	1f766ea9e592fb25e132e7c956321133.exe	28
PID 1584 wrote to memory of 1140	1584	1f766ea9e592fb25e132e7c956321133.exe	28
PID 1140 wrote to memory of 792	1140	cmd.exe	30
PID 1140 wrote to memory of 792	1140	cmd.exe	30
PID 1140 wrote to memory of 792	1140	cmd.exe	30
PID 1584 wrote to memory of 656	1584	1f766ea9e592fb25e132e7c956321133.exe	31
PID 1584 wrote to memory of 656	1584	1f766ea9e592fb25e132e7c956321133.exe	31
PID 1584 wrote to memory of 656	1584	1f766ea9e592fb25e132e7c956321133.exe	31
PID 656 wrote to memory of 288	656	cmd.exe	33
PID 656 wrote to memory of 288	656	cmd.exe	33
PID 656 wrote to memory of 288	656	cmd.exe	33
PID 288 wrote to memory of 1060	288	services.exe	34
PID 288 wrote to memory of 1060	288	services.exe	34
PID 288 wrote to memory of 1060	288	services.exe	34
PID 1060 wrote to memory of 2040	1060	sihost64.exe	35
PID 1060 wrote to memory of 2040	1060	sihost64.exe	35
PID 1060 wrote to memory of 2040	1060	sihost64.exe	35
PID 1060 wrote to memory of 2040	1060	sihost64.exe	35

C:\Users\Admin\AppData\Local\Temp\1f766ea9e592fb25e132e7c956321133.exe
"C:\Users\Admin\AppData\Local\Temp\1f766ea9e592fb25e132e7c956321133.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1584
- C:\Windows\system32\cmd.exe
  "cmd" /c schtasks /create /f /sc onlogon /rl highest /tn "services" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\services.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1140
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "services" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\services.exe"
    3⤵
    - Creates scheduled task(s)
    PID:792
- C:\Windows\system32\cmd.exe
  "cmd" cmd /c "C:\Users\Admin\AppData\Roaming\Microsoft\services.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:656
- - C:\Users\Admin\AppData\Roaming\Microsoft\services.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\services.exe
    3⤵
    - Executes dropped EXE
    - Checks BIOS information in registry
    - Loads dropped DLL
    - Checks whether UAC is enabled
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:288
  - - C:\Users\Admin\AppData\Roaming\Microsoft\Telemetry\sihost64.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Telemetry\sihost64.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:1060
    - - C:\Windows\System32\conhost.exe
        
        "C:\Windows\System32\conhost.exe" "rrrxdvvoxphiagg"
        5⤵
        
        PID:2040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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

memory/288-65-0x0000000000400000-0x0000000000F2C000-memory.dmp

Download

memory/288-67-0x000000001C234000-0x000000001C236000-memory.dmp

Download

memory/288-69-0x000000001C237000-0x000000001C238000-memory.dmp

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memory/288-68-0x000000001C236000-0x000000001C237000-memory.dmp

Download

memory/288-66-0x000000001C232000-0x000000001C234000-memory.dmp

Download

memory/1584-55-0x0000000000400000-0x0000000000F2C000-memory.dmp

Download

memory/1584-61-0x000000001C177000-0x000000001C178000-memory.dmp

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memory/1584-59-0x000000001C174000-0x000000001C176000-memory.dmp

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memory/1584-58-0x000000001C172000-0x000000001C174000-memory.dmp

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memory/1584-60-0x000000001C176000-0x000000001C177000-memory.dmp

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memory/1584-57-0x000000001C3F0000-0x000000001C5E4000-memory.dmp

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memory/1584-56-0x0000000002B70000-0x0000000002D64000-memory.dmp

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memory/2040-72-0x00000000002C0000-0x00000000002C6000-memory.dmp

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memory/2040-73-0x0000000000060000-0x0000000000066000-memory.dmp

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memory/2040-74-0x000000001A400000-0x000000001A480000-memory.dmp

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memory/2040-75-0x000000001A400000-0x000000001A480000-memory.dmp

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memory/2040-76-0x000000001A400000-0x000000001A480000-memory.dmp

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memory/2040-77-0x000000001A400000-0x000000001A480000-memory.dmp

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