5abd0dd9cfbf6f323c0737b139b0daea3f568da4f95fe862b66b74ba3fc04ebe

Analysis

max time kernel
154s
max time network
169s
platform
windows7_x64
resource
win7-en-20211208
submitted
05/02/2022, 15:49

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General

Target
a566a00278189d47ba8a8f61e2142672.exe
Size 5.6MB
Sample220205-s9chsschc5
SHA256 5abd0dd9cfbf6f323c0737b139b0daea3f568da4f95fe862b66b74ba3fc04ebe
MD5 a566a00278189d47ba8a8f61e2142672
SHA1 1297b6a95d19e66ea9689b182213c757c3fe5d52
SHA512 6bae751ed665fd3162d574e702850fbb168b80ea86f86b2b20b451cc8132e8338379721cb1bcd647f9d5601bfe24f4136ccacac17485d6f87e89df75f75410c2
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
1916	services.exe
1436	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	a566a00278189d47ba8a8f61e2142672.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a566a00278189d47ba8a8f61e2142672.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
1792	cmd.exe
1916	services.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1104-55-0x0000000000400000-0x0000000000F23000-memory.dmp	themida
behavioral1/files/0x000400000000b1f2-62.dat	themida
behavioral1/files/0x000400000000b1f2-63.dat	themida
behavioral1/files/0x000400000000b1f2-64.dat	themida
behavioral1/memory/1916-65-0x0000000000400000-0x0000000000F23000-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	a566a00278189d47ba8a8f61e2142672.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	services.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1104	a566a00278189d47ba8a8f61e2142672.exe
1916	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
1456	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1104	a566a00278189d47ba8a8f61e2142672.exe
1916	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1104	a566a00278189d47ba8a8f61e2142672.exe
Token: SeDebugPrivilege	1916	services.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 1108	1104	a566a00278189d47ba8a8f61e2142672.exe	30
PID 1104 wrote to memory of 1108	1104	a566a00278189d47ba8a8f61e2142672.exe	30
PID 1104 wrote to memory of 1108	1104	a566a00278189d47ba8a8f61e2142672.exe	30
PID 1108 wrote to memory of 1456	1108	cmd.exe	32
PID 1108 wrote to memory of 1456	1108	cmd.exe	32
PID 1108 wrote to memory of 1456	1108	cmd.exe	32
PID 1104 wrote to memory of 1792	1104	a566a00278189d47ba8a8f61e2142672.exe	33
PID 1104 wrote to memory of 1792	1104	a566a00278189d47ba8a8f61e2142672.exe	33
PID 1104 wrote to memory of 1792	1104	a566a00278189d47ba8a8f61e2142672.exe	33
PID 1792 wrote to memory of 1916	1792	cmd.exe	35
PID 1792 wrote to memory of 1916	1792	cmd.exe	35
PID 1792 wrote to memory of 1916	1792	cmd.exe	35
PID 1916 wrote to memory of 1436	1916	services.exe	36
PID 1916 wrote to memory of 1436	1916	services.exe	36
PID 1916 wrote to memory of 1436	1916	services.exe	36
PID 1436 wrote to memory of 1548	1436	sihost64.exe	37
PID 1436 wrote to memory of 1548	1436	sihost64.exe	37
PID 1436 wrote to memory of 1548	1436	sihost64.exe	37
PID 1436 wrote to memory of 1548	1436	sihost64.exe	37

C:\Users\Admin\AppData\Local\Temp\a566a00278189d47ba8a8f61e2142672.exe
"C:\Users\Admin\AppData\Local\Temp\a566a00278189d47ba8a8f61e2142672.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:1104
- 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:1108
- - 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:1456
- 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:1792
- - 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:1916
  - - 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:1436
    - - C:\Windows\System32\conhost.exe
        
        "C:\Windows\System32\conhost.exe" "ccuntpovo"
        5⤵
        
        PID:1548

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/1104-60-0x000000001C1E6000-0x000000001C1E7000-memory.dmp

Download

memory/1104-55-0x0000000000400000-0x0000000000F23000-memory.dmp

Download

memory/1104-59-0x000000001C1E4000-0x000000001C1E6000-memory.dmp

Download

memory/1104-58-0x000000001C460000-0x000000001C654000-memory.dmp

Download

memory/1104-61-0x000000001C1E7000-0x000000001C1E8000-memory.dmp

Download

memory/1104-57-0x000000001C1E2000-0x000000001C1E4000-memory.dmp

Download

memory/1104-56-0x0000000002B20000-0x0000000002D14000-memory.dmp

Download

memory/1548-74-0x000000001AC92000-0x000000001AC94000-memory.dmp

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memory/1548-77-0x000000001AC97000-0x000000001AC98000-memory.dmp

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memory/1548-76-0x000000001AC96000-0x000000001AC97000-memory.dmp

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memory/1548-75-0x000000001AC94000-0x000000001AC96000-memory.dmp

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memory/1548-73-0x00000000000A0000-0x00000000000A6000-memory.dmp

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memory/1548-72-0x0000000001CC0000-0x0000000001CC6000-memory.dmp

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memory/1916-65-0x0000000000400000-0x0000000000F23000-memory.dmp

Download

memory/1916-69-0x000000001C217000-0x000000001C218000-memory.dmp

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memory/1916-68-0x000000001C216000-0x000000001C217000-memory.dmp

Download

memory/1916-67-0x000000001C214000-0x000000001C216000-memory.dmp

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memory/1916-66-0x000000001C212000-0x000000001C214000-memory.dmp

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