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

Processes:

MicrosoftApi.exeMicrosoftApi.exeScreanDriver.exe

pid process

3412 MicrosoftApi.exe
772 MicrosoftApi.exe
2724 ScreanDriver.exe

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

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.exeMicrosoftApi.exe

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

Processes:

resource	yara_rule
behavioral2/memory/4056-115-0x00007FF7769D0000-0x00007FF7769D1000-memory.dmp	themida
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida
behavioral2/memory/3412-123-0x00007FF669BF0000-0x00007FF669BF1000-memory.dmp	themida
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.exeMicrosoftApi.exe

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

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.exeMicrosoftApi.exe

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

Processes:

schtasks.exe

pid process

2984 schtasks.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

3948 timeout.exe
3936 timeout.exe

pid	process
4056	a4bd709d2da4d231ecbeca29fa852bdd.exe
3412	MicrosoftApi.exe
772	MicrosoftApi.exe

pid	process
2984	schtasks.exe

pid	process
3948	timeout.exe
3936	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

powershell.exeMicrosoftApi.exeScreanDriver.exe

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

Processes:

powershell.exeMicrosoftApi.exeScreanDriver.exe

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

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.execmd.execmd.exeMicrosoftApi.exe

description	pid	process	target process
PID 4056 wrote to memory of 3412	4056	a4bd709d2da4d231ecbeca29fa852bdd.exe	MicrosoftApi.exe
PID 4056 wrote to memory of 3412	4056	a4bd709d2da4d231ecbeca29fa852bdd.exe	MicrosoftApi.exe
PID 3412 wrote to memory of 2132	3412	MicrosoftApi.exe	cmd.exe
PID 3412 wrote to memory of 2132	3412	MicrosoftApi.exe	cmd.exe
PID 3412 wrote to memory of 3124	3412	MicrosoftApi.exe	cmd.exe
PID 3412 wrote to memory of 3124	3412	MicrosoftApi.exe	cmd.exe
PID 2132 wrote to memory of 3936	2132	cmd.exe	timeout.exe
PID 2132 wrote to memory of 3936	2132	cmd.exe	timeout.exe
PID 3124 wrote to memory of 3948	3124	cmd.exe	timeout.exe
PID 3124 wrote to memory of 3948	3124	cmd.exe	timeout.exe
PID 2132 wrote to memory of 1240	2132	cmd.exe	powershell.exe
PID 2132 wrote to memory of 1240	2132	cmd.exe	powershell.exe
PID 3124 wrote to memory of 2984	3124	cmd.exe	schtasks.exe
PID 3124 wrote to memory of 2984	3124	cmd.exe	schtasks.exe
PID 772 wrote to memory of 2724	772	MicrosoftApi.exe	ScreanDriver.exe
PID 772 wrote to memory of 2724	772	MicrosoftApi.exe	ScreanDriver.exe

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MicrosoftApi.exe.log

MD5
91da0e0d6c73120560eafe3fb0a762fa

SHA1
450b05f8ca5afb737da4312cf7d1603e695ec136

SHA256
bbb62e473ac1b24a55b9fca67848cebc87764d47a6bf60f51d85ed6de28575d1

SHA512
05fb7457b58d099581121c9afc361543a5d2d4b3444994be5cf6a36b3010a76a13310698f77452e2921dc6d1ac511240d95588030a5983eaee7899b625f4e11a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC039.tmp.cmd

MD5
0457e472a69bd0bd6dab41dfe2c4be2f

SHA1
c0f9d27f76a6ee36c55d16e69103437bb2cd6a66

SHA256
01aa092c73faf492be367824798f1aefc863d18f477c0963635f1b8b42b70c2c

SHA512
f4f345f21739b36be16f03a433be6349aafb542d634ae8f8de3759aa42d4b5e5c39c54198ca2982ad3b0253bfa072b372a2144acb9fbe02cab1d17b01bcb530c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC049.tmp.cmd

MD5
6ec11257d6bb8b60a13cf638386a9baa

SHA1
53bc99732ba259186391726eaa4c185def8abf02

SHA256
7b1787ae614204f02e7895178434723983f5e9b82bd6ffdd26de08eb0b4ac675

SHA512
4881669f59cbd2b8c8d4bea7874b225ac6daf2f9ed6147261c3487848c2a82f99ecba0555a4dd7599af01e00620684a8b8581453b7d1481a8b3fd719a3646dc8

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ICSharpCode.SharpZipLib.dll

MD5
5a5ab6c6bf9a23d07bc72cc19c37a432

SHA1
12fd67b780088a9d95eecd06c59658447e42f65c

SHA256
85ff339d1e0b853b0f544530fb022a30254f398d8cecfcdfa9e3c0310c3f4791

SHA512
16f5d6af94daa0833d4a95fcf261273f7610a6aaba01b775a358bee6c4ff25d90ad93abfcaf917256038d0abd272502c10e4e8933a062d456db3db077a7221bd

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe

MD5
a4bd709d2da4d231ecbeca29fa852bdd

SHA1
4cad398255d98302db4bff95ef837a8adef11472

SHA256
ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

SHA512
7c44d71b6aa8e3939c191aed3da246e53b77c121ab6b605b7b1ab799ea49ac195050d3c7066a3e1214cd5899bc50bfc1e67063509d4eccf99481c54bf60ed8f1

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe

MD5
a4bd709d2da4d231ecbeca29fa852bdd

SHA1
4cad398255d98302db4bff95ef837a8adef11472

SHA256
ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

SHA512
7c44d71b6aa8e3939c191aed3da246e53b77c121ab6b605b7b1ab799ea49ac195050d3c7066a3e1214cd5899bc50bfc1e67063509d4eccf99481c54bf60ed8f1

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe

MD5
a4bd709d2da4d231ecbeca29fa852bdd

SHA1
4cad398255d98302db4bff95ef837a8adef11472

SHA256
ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

SHA512
7c44d71b6aa8e3939c191aed3da246e53b77c121ab6b605b7b1ab799ea49ac195050d3c7066a3e1214cd5899bc50bfc1e67063509d4eccf99481c54bf60ed8f1

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe

MD5
7d5dce7315ef85297c70b1cc5dfe90fc

SHA1
cd782852ecb85cbc4355003e265d5caa7003da20

SHA256
4c2d0c1ffd5db4f4f6027f801dee59a0c38cc9cfb55ae60280a7e4aad2b5e370

SHA512
aba0deb7ffd417772329489092752f6ad72edf003186baf4eabdbf30b6202c1e13d290a1bc63c9696d7fb5790e0afb250caa4ed840b158d31721e3497662550f

Download Submit
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe

MD5
7d5dce7315ef85297c70b1cc5dfe90fc

SHA1
cd782852ecb85cbc4355003e265d5caa7003da20

SHA256
4c2d0c1ffd5db4f4f6027f801dee59a0c38cc9cfb55ae60280a7e4aad2b5e370

SHA512
aba0deb7ffd417772329489092752f6ad72edf003186baf4eabdbf30b6202c1e13d290a1bc63c9696d7fb5790e0afb250caa4ed840b158d31721e3497662550f

Download Submit
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/1240-133-0x0000000000000000-mapping.dmp

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/2132-127-0x0000000000000000-mapping.dmp

Download
memory/2724-183-0x0000000000000000-mapping.dmp

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/2984-134-0x0000000000000000-mapping.dmp

Download
memory/3124-128-0x0000000000000000-mapping.dmp

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/3412-119-0x0000000000000000-mapping.dmp

Download
memory/3936-131-0x0000000000000000-mapping.dmp

Download
memory/3948-132-0x0000000000000000-mapping.dmp

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