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\\259438975.dll"	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
1952	cmd.exe

Executes dropped EXE 1 IoCs

Processes:

SySyaus.exe

pid	Process
2712	SySyaus.exe

Loads dropped DLL 7 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exesvchost.exeSySyaus.exe

pid	Process
2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
2556	svchost.exe
2556	svchost.exe
2712	SySyaus.exe
2712	SySyaus.exe
2712	SySyaus.exe
2712	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:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exesvchost.execmd.exePING.EXESySyaus.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
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

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:

cmd.exePING.EXE

pid	Process
1952	cmd.exe
2560	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
2560	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

pid	Process
2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

description	pid	Process
Token: SeIncBasePriorityPrivilege	2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

pid	Process
2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.execmd.exesvchost.exe

description	pid	Process	procid_target
PID 2444 wrote to memory of 1952	2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	32
PID 2444 wrote to memory of 1952	2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	32
PID 2444 wrote to memory of 1952	2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	32
PID 2444 wrote to memory of 1952	2444	a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe	32
PID 1952 wrote to memory of 2560	1952	cmd.exe	34
PID 1952 wrote to memory of 2560	1952	cmd.exe	34
PID 1952 wrote to memory of 2560	1952	cmd.exe	34
PID 1952 wrote to memory of 2560	1952	cmd.exe	34
PID 2556 wrote to memory of 2712	2556	svchost.exe	35
PID 2556 wrote to memory of 2712	2556	svchost.exe	35
PID 2556 wrote to memory of 2712	2556	svchost.exe	35
PID 2556 wrote to memory of 2712	2556	svchost.exe	35

C:\Users\Admin\AppData\Local\Temp\a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe
"C:\Users\Admin\AppData\Local\Temp\a4cdb56a6b905ad47a796da718a187e862fee0e713755f97cc197838f3111e28.exe"
1⤵
- Server Software Component: Terminal Services DLL
- 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:2444
- 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⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1952
- - 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:2560

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SySyaus"
1⤵
PID:2168

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:2556
- C:\Windows\SysWOW64\SySyaus.exe
  C:\Windows\system32\SySyaus.exe "c:\programdata\application data\259438975.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2712

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

Remote System Discovery

1

T1018

System Information Discovery

1

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

\ProgramData\259438975.dll

Filesize
25KB

MD5
68538df67905de19a1ae6f26134d6eb8

SHA1
97d6ee1380595e33bd1160f9d21638dc4fb6c9c1

SHA256
cd95863f2ebefd86d8da85e528b3677bcf0896efaaaabe929a8624167e94172b

SHA512
16b42710f60ea46086b750d4d6b0f2a0fec12b85e2e346eecfcd1d807d82c1632ae77b8c7a08fe31230f3215b9178019cc5955945604f94d264a4f2a959a8d2b

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\Windows\SysWOW64\SySyaus.exe

Filesize
43KB

MD5
51138beea3e2c21ec44d0932c71762a8

SHA1
8939cf35447b22dd2c6e6f443446acc1bf986d58

SHA256
5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

SHA512
794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads