2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459

General

Target

2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe
Size

416KB
MD5

f5d7b79ee6b6da6b50e536030bcc3b59
SHA1

751b555a8eede96d55395290f60adc43b28ba5e2
SHA256

2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459
SHA512

532b17cd2a6ac5172b1ddba1e63edd51ab53a4527204415241e3a78e8ffeb9728071bde5ae1eefabefd2627f00963f8a5458668cd7b8df041c8683252ff56b46
SSDEEP

12288:ISqMakU3v+GYLWIjD9dSbvBG5u2uQjdQco:jq53v+G4Wwub8Ljaco

Score

8^/10

discovery

Malware Config

Signatures

Downloads MZ/PE file

.NET Reactor proctector 2 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/files/0x0002000000022a83-17.dat	net_reactor
behavioral2/memory/3648-31-0x0000000000B40000-0x0000000001764000-memory.dmp	net_reactor

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	Hkbsse.exe

Executes dropped EXE 5 IoCs

pid	Process
2888	Hkbsse.exe
3940	Hkbsse.exe
5048	Hkbsse.exe
3648	openVPN.exe
5068	Hkbsse.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3648 set thread context of 3504	3648	openVPN.exe	103

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Hkbsse.job	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3144	3504	WerFault.exe	103

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Hkbsse.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	openVPN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3648	openVPN.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3624 wrote to memory of 2888	3624	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe	89
PID 3624 wrote to memory of 2888	3624	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe	89
PID 3624 wrote to memory of 2888	3624	2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe	89
PID 2888 wrote to memory of 3648	2888	Hkbsse.exe	102
PID 2888 wrote to memory of 3648	2888	Hkbsse.exe	102
PID 2888 wrote to memory of 3648	2888	Hkbsse.exe	102
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103
PID 3648 wrote to memory of 3504	3648	openVPN.exe	103

C:\Users\Admin\AppData\Local\Temp\2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe
"C:\Users\Admin\AppData\Local\Temp\2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3624
- C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
  "C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Users\Admin\AppData\Local\Temp\1000042001\openVPN.exe
    "C:\Users\Admin\AppData\Local\Temp\1000042001\openVPN.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3648
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:3504
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3504 -s 852
        5⤵
        Program crash
        
        PID:3144

C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:3940

C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3504 -ip 3504
1⤵
PID:8

C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:5068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\054fdc5f70\Hkbsse.exe

Filesize
416KB

MD5
f5d7b79ee6b6da6b50e536030bcc3b59

SHA1
751b555a8eede96d55395290f60adc43b28ba5e2

SHA256
2f1aff28961ba0ce85ea0e35b8936bc387f84f459a4a1d63d964ce79e34b8459

SHA512
532b17cd2a6ac5172b1ddba1e63edd51ab53a4527204415241e3a78e8ffeb9728071bde5ae1eefabefd2627f00963f8a5458668cd7b8df041c8683252ff56b46

Download Submit
C:\Users\Admin\AppData\Local\Temp\1000042001\openVPN.exe

Filesize
12.1MB

MD5
269a751b0c6d68cc39b2267c1592dae2

SHA1
2ead3153069297c67bb33c7a83e63d2721aa9f4d

SHA256
319d1dc217b7e83a85dd62cb2c066156ba5579087f11c991a99089606979ca28

SHA512
d8da3bf11287c5168544c3d39460b428252dd1f60f7777a3770bc537f89def019078f46b9695a78338bc227e67c902494912d36dcd046e2a514bd0bd96107929

Download Submit
memory/3504-36-0x0000000000400000-0x00000000005E1000-memory.dmp

Filesize
1.9MB

Download
memory/3504-38-0x0000000000400000-0x00000000005E1000-memory.dmp

Filesize
1.9MB

Download
memory/3504-40-0x0000000000400000-0x00000000005E1000-memory.dmp

Filesize
1.9MB

Download
memory/3648-31-0x0000000000B40000-0x0000000001764000-memory.dmp

Filesize
12.1MB

Download
memory/3648-32-0x00000000062F0000-0x000000000638C000-memory.dmp

Filesize
624KB

Download
memory/3648-33-0x0000000007600000-0x0000000007A78000-memory.dmp

Filesize
4.5MB

Download
memory/3648-34-0x0000000007A80000-0x0000000007D0C000-memory.dmp

Filesize
2.5MB

Download
memory/3648-35-0x0000000005C70000-0x0000000005C92000-memory.dmp

Filesize
136KB

Download

Analysis

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