fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877

General

Target

fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
Size

38KB
MD5

8ada2f4c4545d4d734e6a7b69a795f50
SHA1

0abcf93659b3c19c8bdbab3b80b4293715aa1990
SHA256

fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877
SHA512

aa662ab2105a3bf064eae3f3659f30647064ee40736a8fc9dae63270041fd0be14c3add7d42d9a15d6471ed49b3b12731dcc5ce3c023db3435323e85de860635
SSDEEP

768:Nzj1JegVa3Gry+uELEmITCs/NUZ6nZdYbCLECkrQoP9fmF2f1cONb:NWQa2TLEmITcoQxfllfmS1cOl

Score

8^/10

discovery evasion execution upx

Malware Config

Signatures

Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
2744	smss.exe

Loads dropped DLL 2 IoCs

pid	Process
3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3052-0-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/files/0x0008000000016dbe-4.dat	upx
behavioral1/memory/2744-13-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/memory/3052-19-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/memory/2744-21-0x0000000000400000-0x0000000000422000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\Service.exe	smss.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2752	sc.exe
2692	sc.exe

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	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
2744	smss.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 2692	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	31
PID 3052 wrote to memory of 2692	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	31
PID 3052 wrote to memory of 2692	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	31
PID 3052 wrote to memory of 2692	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	31
PID 3052 wrote to memory of 2744	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	33
PID 3052 wrote to memory of 2744	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	33
PID 3052 wrote to memory of 2744	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	33
PID 3052 wrote to memory of 2744	3052	fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe	33
PID 2744 wrote to memory of 2752	2744	smss.exe	34
PID 2744 wrote to memory of 2752	2744	smss.exe	34
PID 2744 wrote to memory of 2752	2744	smss.exe	34
PID 2744 wrote to memory of 2752	2744	smss.exe	34

C:\Users\Admin\AppData\Local\Temp\fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe
"C:\Users\Admin\AppData\Local\Temp\fa61f905efbe754cc3ca80590c426235e6a0f4f4c02369ed82021c70f9dcc877N.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2692
- C:\Windows\SysWOW64\1230\smss.exe
  C:\Windows\system32\1230\smss.exe -d
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2744
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    - System Location Discovery: System Language Discovery
    PID:2752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

1

T1489

Replay Monitor

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\1230\smss.exe

Filesize
38KB

MD5
4100d95f7bbf61e418dbee6053050433

SHA1
9dd516f6c79d092367a8fdca6a26fddf5c4d1b89

SHA256
09d7da277305babf13d70399e5b1ddea30069f12e16674f912dde16bee3a7714

SHA512
b83205fa4c5238ad91af68fc7b4146f2a8d93ecbceac472ab6749b0bdb2e24043cda637909443cabef9d7c29ea6b2a0ab76c1fe73b1a34b2bec3caa356cc2d4d

Download Submit
memory/2744-13-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2744-21-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3052-0-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3052-11-0x00000000005D0000-0x00000000005F2000-memory.dmp

Filesize
136KB

Download
memory/3052-10-0x00000000005D0000-0x00000000005F2000-memory.dmp

Filesize
136KB

Download
memory/3052-19-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing