476328c1ba85a1df9b0e678b9219dd1d5e529596303896049797683f20ad23e2

General

Target

0x000b00000001225f-4.exe
Size

48KB
MD5

2c8e6b45f0113b45f9187b60df114fef
SHA1

7e7b6f59fced74c16bef14f03f19eeecb5d34103
SHA256

476328c1ba85a1df9b0e678b9219dd1d5e529596303896049797683f20ad23e2
SHA512

3a415e14ce61e0dfbdd1064f39b129f11ee1419442c49209e62c90d54d57b4a9ef8544f2108bf562ec9d8c9dd3daa3221a4b670918ba48af68ca439921301337
SSDEEP

768:zynb12Aw5J6HC4kq5Jp9bjAzhyY55J+NStcEeUlyqgZl4p67ohPC:Ub1MsHz3JDwhyWr+N95OTga6L

Score

8^/10

discovery persistence

Malware Config

Signatures

Server Software Component: Terminal Services DLL 1 TTPs 1 IoCs

persistence

Terminal Services DLL

T1505.005

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\encvbk\Parameters\ServiceDll = "C:\\Program Files (x86)\\240627468.dll"	0x000b00000001225f-4.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	0x000b00000001225f-4.exe

Executes dropped EXE 1 IoCs

pid	Process
2056	encvbk.exe

Loads dropped DLL 3 IoCs

pid	Process
3588	0x000b00000001225f-4.exe
1808	svchost.exe
2056	encvbk.exe

Creates a Windows Service
persistence

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\encvbk.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\encvbk.exe	svchost.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\240627468.dll	0x000b00000001225f-4.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	encvbk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x000b00000001225f-4.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
64	cmd.exe
492	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
492	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3588	0x000b00000001225f-4.exe
3588	0x000b00000001225f-4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3588	0x000b00000001225f-4.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3588	0x000b00000001225f-4.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 64	3588	0x000b00000001225f-4.exe	86
PID 3588 wrote to memory of 64	3588	0x000b00000001225f-4.exe	86
PID 3588 wrote to memory of 64	3588	0x000b00000001225f-4.exe	86
PID 64 wrote to memory of 492	64	cmd.exe	88
PID 64 wrote to memory of 492	64	cmd.exe	88
PID 64 wrote to memory of 492	64	cmd.exe	88
PID 1808 wrote to memory of 2056	1808	svchost.exe	89
PID 1808 wrote to memory of 2056	1808	svchost.exe	89
PID 1808 wrote to memory of 2056	1808	svchost.exe	89

C:\Users\Admin\AppData\Local\Temp\0x000b00000001225f-4.exe
"C:\Users\Admin\AppData\Local\Temp\0x000b00000001225f-4.exe"
1⤵
- Server Software Component: Terminal Services DLL
- Checks computer location settings
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 1 && del /f/q "C:\Users\Admin\AppData\Local\Temp\0x000b00000001225f-4.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:64
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:492

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "encvbk"
1⤵
PID:4532

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "encvbk"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1808
- C:\Windows\SysWOW64\encvbk.exe
  C:\Windows\system32\encvbk.exe "c:\program files (x86)\240627468.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Server Software Component

1

T1505

Terminal Services DLL

1

T1505.005

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\240627468.dll

Filesize
25KB

MD5
0a9a34b7b8be7680123dc29107a3eaac

SHA1
883f19efcea8184b9d01e5aae9455de0b64d71eb

SHA256
c105d6b7304a43bfacf713b09c01e213047ac1e9123c1723e0164cf644cb0f37

SHA512
6002ab855d8c96a43d9880de14a09e4e96d51336b4d0203a1d9470ac9ff1cf4a56faf15c6fe62fffc4b52970d4788eb341125d90641365f89cd6780fdae3ab08

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C:\Windows\SysWOW64\encvbk.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

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Analysis

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