a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28

General

Target

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
Size

48KB
MD5

bfa4248005947726368f38380aab0158
SHA1

bf5d8ea3d634bd1b7ec164a2e3659c7ba8f96148
SHA256

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28
SHA512

78071ca4b44c193eae004519a4d2777e4bd1fbd277bbd860d07186d165e86328b3b8af903c1846068e4d4852bb7ef37256bac364f97363b150b717413c9a0d64
SSDEEP

768:zynb12Aw5J6HC4kq5Jp9bjAzhyY55J+NStcEeUlyqgZl4p67xhPC:Ub1MsHz3JDwhyWr+N95OTga6C

Score

8^/10

discovery persistence

Malware Config

Signatures

Server Software Component: Terminal Services DLL 1 TTPs 1 IoCs

persistence

Terminal Services DLL

T1505.005

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SySyaus\Parameters\ServiceDll = "C:\\ProgramData\\Application Data\\240615562.dll"	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.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

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Executes dropped EXE 1 IoCs

Processes:

SySyaus.exe

pid	Process
4504	SySyaus.exe

Loads dropped DLL 3 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exesvchost.exeSySyaus.exe

pid	Process
3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
3148	svchost.exe
4504	SySyaus.exe

Creates a Windows Service
persistence

Drops file in System32 directory 2 IoCs

Processes:

svchost.exe

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

Processes:

svchost.execmd.exePING.EXESySyaus.exea4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

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	SySyaus.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.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

Processes:

PING.EXEcmd.exe

pid	Process
3852	PING.EXE
4856	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
3852	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

pid	Process
3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

description	pid	Process
Token: SeIncBasePriorityPrivilege	3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

pid	Process
3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.execmd.exesvchost.exe

description	pid	Process	procid_target
PID 3508 wrote to memory of 4856	3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	87
PID 3508 wrote to memory of 4856	3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	87
PID 3508 wrote to memory of 4856	3508	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	87
PID 4856 wrote to memory of 3852	4856	cmd.exe	89
PID 4856 wrote to memory of 3852	4856	cmd.exe	89
PID 4856 wrote to memory of 3852	4856	cmd.exe	89
PID 3148 wrote to memory of 4504	3148	svchost.exe	94
PID 3148 wrote to memory of 4504	3148	svchost.exe	94
PID 3148 wrote to memory of 4504	3148	svchost.exe	94

C:\Users\Admin\AppData\Local\Temp\a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
"C:\Users\Admin\AppData\Local\Temp\a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe"
1⤵
- Server Software Component: Terminal Services DLL
- Checks computer location settings
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3508
- 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\a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4856
- - 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:3852

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SySyaus"
1⤵
PID:1420

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SySyaus"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3148
- C:\Windows\SysWOW64\SySyaus.exe
  C:\Windows\system32\SySyaus.exe "c:\programdata\application data\240615562.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:4504

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

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Downloads

C:\ProgramData\240615562.dll

Filesize
25KB

MD5
68538df67905de19a1ae6f26134d6eb8

SHA1
97d6ee1380595e33bd1160f9d21638dc4fb6c9c1

SHA256
cd95863f2ebefd86d8da85e528b3677bcf0896efaaaabe929a8624167e94172b

SHA512
16b42710f60ea46086b750d4d6b0f2a0fec12b85e2e346eecfcd1d807d82c1632ae77b8c7a08fe31230f3215b9178019cc5955945604f94d264a4f2a959a8d2b

Download Submit
C:\Windows\SysWOW64\SySyaus.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads