ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

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

1804 MicrosoftApi.exe
1096 MicrosoftApi.exe
1520 ScreanDriver.exe

pid	process
1804	MicrosoftApi.exe
1096	MicrosoftApi.exe
1520	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\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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	a4bd709d2da4d231ecbeca29fa852bdd.exe

Loads dropped DLL 2 IoCs

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.exe

pid process

1724 a4bd709d2da4d231ecbeca29fa852bdd.exe
1096 MicrosoftApi.exe

pid	process
1724	a4bd709d2da4d231ecbeca29fa852bdd.exe
1096	MicrosoftApi.exe

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1724-61-0x000000013F960000-0x000000013F961000-memory.dmp	themida
\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida
behavioral1/memory/1804-69-0x000000013F410000-0x000000013F411000-memory.dmp	themida
C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe	themida
behavioral1/memory/1096-80-0x000000013F790000-0x000000013F791000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

MicrosoftApi.exeMicrosoftApi.exea4bd709d2da4d231ecbeca29fa852bdd.exe

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

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.exeMicrosoftApi.exe

pid process

1724 a4bd709d2da4d231ecbeca29fa852bdd.exe
1804 MicrosoftApi.exe
1096 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

1444 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1064 timeout.exe

pid	process
1724	a4bd709d2da4d231ecbeca29fa852bdd.exe
1804	MicrosoftApi.exe
1096	MicrosoftApi.exe

pid	process
1444	schtasks.exe

pid	process
1064	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

MicrosoftApi.exeScreanDriver.exe

pid	process
1096	MicrosoftApi.exe
1096	MicrosoftApi.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe
1520	ScreanDriver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

MicrosoftApi.exeScreanDriver.exe

description pid process

Token: SeDebugPrivilege 1096 MicrosoftApi.exe
Token: SeDebugPrivilege 1520 ScreanDriver.exe

description	pid	process
Token: SeDebugPrivilege	1096	MicrosoftApi.exe
Token: SeDebugPrivilege	1520	ScreanDriver.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

a4bd709d2da4d231ecbeca29fa852bdd.exeMicrosoftApi.execmd.exetaskeng.exeMicrosoftApi.exe

description	pid	process	target process
PID 1724 wrote to memory of 1804	1724	a4bd709d2da4d231ecbeca29fa852bdd.exe	MicrosoftApi.exe
PID 1724 wrote to memory of 1804	1724	a4bd709d2da4d231ecbeca29fa852bdd.exe	MicrosoftApi.exe
PID 1724 wrote to memory of 1804	1724	a4bd709d2da4d231ecbeca29fa852bdd.exe	MicrosoftApi.exe
PID 1804 wrote to memory of 820	1804	MicrosoftApi.exe	cmd.exe
PID 1804 wrote to memory of 820	1804	MicrosoftApi.exe	cmd.exe
PID 1804 wrote to memory of 820	1804	MicrosoftApi.exe	cmd.exe
PID 820 wrote to memory of 1064	820	cmd.exe	timeout.exe
PID 820 wrote to memory of 1064	820	cmd.exe	timeout.exe
PID 820 wrote to memory of 1064	820	cmd.exe	timeout.exe
PID 820 wrote to memory of 1444	820	cmd.exe	schtasks.exe
PID 820 wrote to memory of 1444	820	cmd.exe	schtasks.exe
PID 820 wrote to memory of 1444	820	cmd.exe	schtasks.exe
PID 1472 wrote to memory of 1096	1472	taskeng.exe	MicrosoftApi.exe
PID 1472 wrote to memory of 1096	1472	taskeng.exe	MicrosoftApi.exe
PID 1472 wrote to memory of 1096	1472	taskeng.exe	MicrosoftApi.exe
PID 1096 wrote to memory of 1520	1096	MicrosoftApi.exe	ScreanDriver.exe
PID 1096 wrote to memory of 1520	1096	MicrosoftApi.exe	ScreanDriver.exe
PID 1096 wrote to memory of 1520	1096	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
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1724
- 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:1804
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpACC3.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:820
  - - C:\Windows\system32\timeout.exe
      timeout 4
      4⤵
      Delays execution with timeout.exe
      PID:1064
  - - 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:1444

C:\Windows\system32\taskeng.exe
taskeng.exe {027A6E86-CFC5-40CC-82E2-CD1CBEFCABB1} S-1-5-21-2455352368-1077083310-2879168483-1000:QWOCTUPM\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1472
- 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
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe
    "C:\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\ScreanDriver.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpACC3.tmp.cmd

MD5
580e08c0388a1de3befca87d60082414

SHA1
7eecdc5e74511b47d26df7060af56c3ac1fe9cb0

SHA256
d757724cf6d91b3ee52682ec23afc1f5a2ce37c2cbeb5042606765e7de005874

SHA512
75b6b4bdef02af10b42fa1834e0ce4d0035cb6ba2b6d8e82b1ccb25de85ec252b1fae763b93eba234d89a2e2dad2ceb5998769d79f206018feee3f0f0341035a

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\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
\Users\Admin\AppData\Roaming\ServiceMicrosoftApi\MicrosoftApi.exe

MD5
a4bd709d2da4d231ecbeca29fa852bdd

SHA1
4cad398255d98302db4bff95ef837a8adef11472

SHA256
ff03a31c53b6e540bb918372dbc2a0213e5020273c6c46fdb2ef5f86ec7a0397

SHA512
7c44d71b6aa8e3939c191aed3da246e53b77c121ab6b605b7b1ab799ea49ac195050d3c7066a3e1214cd5899bc50bfc1e67063509d4eccf99481c54bf60ed8f1

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

MD5
7d5dce7315ef85297c70b1cc5dfe90fc

SHA1
cd782852ecb85cbc4355003e265d5caa7003da20

SHA256
4c2d0c1ffd5db4f4f6027f801dee59a0c38cc9cfb55ae60280a7e4aad2b5e370

SHA512
aba0deb7ffd417772329489092752f6ad72edf003186baf4eabdbf30b6202c1e13d290a1bc63c9696d7fb5790e0afb250caa4ed840b158d31721e3497662550f

Download Submit
memory/820-73-0x0000000000000000-mapping.dmp

Download
memory/1064-75-0x0000000000000000-mapping.dmp

Download
memory/1096-84-0x0000000002110000-0x0000000002112000-memory.dmp

Filesize
8KB

Download
memory/1096-77-0x0000000000000000-mapping.dmp

Download
memory/1096-80-0x000000013F790000-0x000000013F791000-memory.dmp

Filesize
4KB

Download
memory/1096-82-0x0000000000070000-0x0000000000071000-memory.dmp

Filesize
4KB

Download
memory/1096-83-0x000007FE80010000-0x000007FE80011000-memory.dmp

Filesize
4KB

Download
memory/1096-86-0x0000000002660000-0x0000000002661000-memory.dmp

Filesize
4KB

Download
memory/1444-76-0x0000000000000000-mapping.dmp

Download
memory/1520-88-0x0000000000000000-mapping.dmp

Download
memory/1520-94-0x000000001D566000-0x000000001D585000-memory.dmp

Filesize
124KB

Download
memory/1520-93-0x000000001D560000-0x000000001D562000-memory.dmp

Filesize
8KB

Download
memory/1520-91-0x000000013FA40000-0x000000013FA41000-memory.dmp

Filesize
4KB

Download
memory/1724-64-0x000007FE80010000-0x000007FE80011000-memory.dmp

Filesize
4KB

Download
memory/1724-61-0x000000013F960000-0x000000013F961000-memory.dmp

Filesize
4KB

Download
memory/1724-63-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/1804-70-0x0000000000070000-0x0000000000071000-memory.dmp

Filesize
4KB

Download
memory/1804-66-0x0000000000000000-mapping.dmp

Download
memory/1804-72-0x000007FE80010000-0x000007FE80011000-memory.dmp

Filesize
4KB

Download
memory/1804-69-0x000000013F410000-0x000000013F411000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads