ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

Analysis

max time kernel
150s
max time network
113s
platform
windows10_x64
resource
win10v20210410
submitted
19-07-2021 13:06

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General

Target

a4bd709d2da4d231ecbeca29fa852bdd.exe
Size

5.9MB
MD5

a4bd709d2da4d231ecbeca29fa852bdd
SHA1

4cad398255d98302db4bff95ef837a8adef11472
SHA256

ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397
SHA512

7c44d71b6aa8e3939c191aed3da246e53b77c121ab6b605b7b1ab799ea49ac195050d3c7066a3e1214cd5899bc50bfc1e67063509d4eccf99481c54bf60ed8f1

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 3 IoCs

pid	Process
3412	MicrosoftApi.exe
772	MicrosoftApi.exe
2724	ScreanDriver.exe

Checks BIOS information in registry 2 TTPs 6 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	a4bd709d2da4d231ecbeca29fa852bdd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a4bd709d2da4d231ecbeca29fa852bdd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	MicrosoftApi.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	MicrosoftApi.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	MicrosoftApi.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	MicrosoftApi.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/4056-115-0x00007FF7769D0000-0x00007FF7769D1000-memory.dmp	themida
behavioral2/files/0x000500000001ab70-120.dat	themida
behavioral2/files/0x000500000001ab70-121.dat	themida
behavioral2/memory/3412-123-0x00007FF669BF0000-0x00007FF669BF1000-memory.dmp	themida
behavioral2/files/0x000500000001ab70-175.dat	themida

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	a4bd709d2da4d231ecbeca29fa852bdd.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	MicrosoftApi.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	MicrosoftApi.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
4056	a4bd709d2da4d231ecbeca29fa852bdd.exe
3412	MicrosoftApi.exe
772	MicrosoftApi.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
2984	schtasks.exe

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
3948	timeout.exe
3936	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1240	powershell.exe
1240	powershell.exe
1240	powershell.exe
772	MicrosoftApi.exe
772	MicrosoftApi.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe
2724	ScreanDriver.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeIncreaseQuotaPrivilege	1240	powershell.exe
Token: SeSecurityPrivilege	1240	powershell.exe
Token: SeTakeOwnershipPrivilege	1240	powershell.exe
Token: SeLoadDriverPrivilege	1240	powershell.exe
Token: SeSystemProfilePrivilege	1240	powershell.exe
Token: SeSystemtimePrivilege	1240	powershell.exe
Token: SeProfSingleProcessPrivilege	1240	powershell.exe
Token: SeIncBasePriorityPrivilege	1240	powershell.exe
Token: SeCreatePagefilePrivilege	1240	powershell.exe
Token: SeBackupPrivilege	1240	powershell.exe
Token: SeRestorePrivilege	1240	powershell.exe
Token: SeShutdownPrivilege	1240	powershell.exe
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeSystemEnvironmentPrivilege	1240	powershell.exe
Token: SeRemoteShutdownPrivilege	1240	powershell.exe
Token: SeUndockPrivilege	1240	powershell.exe
Token: SeManageVolumePrivilege	1240	powershell.exe
Token: 33	1240	powershell.exe
Token: 34	1240	powershell.exe
Token: 35	1240	powershell.exe
Token: 36	1240	powershell.exe
Token: SeDebugPrivilege	772	MicrosoftApi.exe
Token: SeDebugPrivilege	2724	ScreanDriver.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 3412	4056	a4bd709d2da4d231ecbeca29fa852bdd.exe	80
PID 4056 wrote to memory of 3412	4056	a4bd709d2da4d231ecbeca29fa852bdd.exe	80
PID 3412 wrote to memory of 2132	3412	MicrosoftApi.exe	81
PID 3412 wrote to memory of 2132	3412	MicrosoftApi.exe	81
PID 3412 wrote to memory of 3124	3412	MicrosoftApi.exe	83
PID 3412 wrote to memory of 3124	3412	MicrosoftApi.exe	83
PID 2132 wrote to memory of 3936	2132	cmd.exe	86
PID 2132 wrote to memory of 3936	2132	cmd.exe	86
PID 3124 wrote to memory of 3948	3124	cmd.exe	85
PID 3124 wrote to memory of 3948	3124	cmd.exe	85
PID 2132 wrote to memory of 1240	2132	cmd.exe	87
PID 2132 wrote to memory of 1240	2132	cmd.exe	87
PID 3124 wrote to memory of 2984	3124	cmd.exe	88
PID 3124 wrote to memory of 2984	3124	cmd.exe	88
PID 772 wrote to memory of 2724	772	MicrosoftApi.exe	91
PID 772 wrote to memory of 2724	772	MicrosoftApi.exe	91

C:\Users\Admin\AppData\Local\Temp\a4bd709d2da4d231ecbeca29fa852bdd.exe
"C:\Users\Admin\AppData\Local\Temp\a4bd709d2da4d231ecbeca29fa852bdd.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe
  "C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe"
  2⤵
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC039.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2132
  - - C:\Windows\system32\timeout.exe
      timeout 4
      4⤵
      Delays execution with timeout.exe
      PID:3936
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1240
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC049.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3124
  - - C:\Windows\system32\timeout.exe
      timeout 4
      4⤵
      Delays execution with timeout.exe
      PID:3948
  - - C:\Windows\system32\schtasks.exe
      schtasks.exe /create /f /sc MINUTE /mo 1 /tn "MicrosoftApi" /tr "'C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe"'
      4⤵
      Creates scheduled task(s)
      PID:2984

C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe
1⤵
- Executes dropped EXE
- 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:772
- C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe
  "C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2724

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

Replay Monitor

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Downloads

memory/772-181-0x000002B785490000-0x000002B785491000-memory.dmp

Filesize
4KB

Download
memory/772-182-0x000002B79E010000-0x000002B79E012000-memory.dmp

Filesize
8KB

Download
memory/1240-145-0x0000023E82780000-0x0000023E82781000-memory.dmp

Filesize
4KB

Download
memory/1240-140-0x0000023E82200000-0x0000023E82201000-memory.dmp

Filesize
4KB

Download
memory/1240-158-0x0000023EFF483000-0x0000023EFF485000-memory.dmp

Filesize
8KB

Download
memory/1240-157-0x0000023EFF480000-0x0000023EFF482000-memory.dmp

Filesize
8KB

Download
memory/1240-160-0x0000023EFF486000-0x0000023EFF488000-memory.dmp

Filesize
8KB

Download
memory/1240-174-0x0000023EFF488000-0x0000023EFF489000-memory.dmp

Filesize
4KB

Download
memory/2724-186-0x0000018EFEFF0000-0x0000018EFEFF1000-memory.dmp

Filesize
4KB

Download
memory/2724-189-0x0000018E99E72000-0x0000018E99E74000-memory.dmp

Filesize
8KB

Download
memory/2724-188-0x0000018E99E70000-0x0000018E99E72000-memory.dmp

Filesize
8KB

Download
memory/2724-190-0x0000018E99E74000-0x0000018E99E76000-memory.dmp

Filesize
8KB

Download
memory/3412-126-0x00007FF800030000-0x00007FF800031000-memory.dmp

Filesize
4KB

Download
memory/3412-125-0x00007FF800000000-0x00007FF800002000-memory.dmp

Filesize
8KB

Download
memory/3412-123-0x00007FF669BF0000-0x00007FF669BF1000-memory.dmp

Filesize
4KB

Download
memory/4056-115-0x00007FF7769D0000-0x00007FF7769D1000-memory.dmp

Filesize
4KB

Download
memory/4056-118-0x00007FF800030000-0x00007FF800031000-memory.dmp

Filesize
4KB

Download
memory/4056-117-0x00007FF800000000-0x00007FF800002000-memory.dmp

Filesize
8KB

Download