d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbc

General

Target
d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe
Size 39KB
Sample241106-ap1qsa1hkf
SHA256 d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbc
MD5 8c6a79de0f839e39d7b97a46ab9394e0
SHA1 7289fee01ec32835125ab351ba23a2910e0dbf52
SHA512 2f4a6456206fbe0ac93c923765a68e9a8687e51dd4d7987d5b06a5a6faec35262eb40b0319c921a885c0839f55b7e4ebe49a88eb4443310b5f41c74448800e0b
SSDEEP 768:Nzj1JegVa3Gry+uELEmITCs/NUZ6nZdYbCLECkrQoP9fmF2f1cOGuT:NWQa2TLEmITcoQxfllfmS1cOn
MD5 SHA1 SHA512 SSDEEP

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
4616	smss.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\Service.exe	smss.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/files/0x0007000000023c75-5.dat	upx
behavioral2/memory/4192-11-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/memory/4616-13-0x0000000000400000-0x0000000000422000-memory.dmp	upx

Launches sc.exe 2 IoCs

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

pid	Process
4024	sc.exe
4996	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe
4616	smss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 4024	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	84
PID 4192 wrote to memory of 4024	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	84
PID 4192 wrote to memory of 4024	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	84
PID 4192 wrote to memory of 4616	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	86
PID 4192 wrote to memory of 4616	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	86
PID 4192 wrote to memory of 4616	4192	d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe	86
PID 4616 wrote to memory of 4996	4616	smss.exe	87
PID 4616 wrote to memory of 4996	4616	smss.exe	87
PID 4616 wrote to memory of 4996	4616	smss.exe	87

C:\Users\Admin\AppData\Local\Temp\d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe
"C:\Users\Admin\AppData\Local\Temp\d03d6441810e8ebd74bc4287014afcc194838fd21695940780b8095d802e3bbcN.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4024
- 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:4616
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    - System Location Discovery: System Language Discovery
    PID:4996

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

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Downloads

smss.exe

Path C:\Windows\SysWOW64\1230\smss.exe
Size 39KB
SHA256 099f2eaeb78f8d2a196939fd32aebdd3fa31024d8403a919020b6f9c6617d471
MD5 cab8d2965b73086184b71334809baaf2
SHA1 84fdff8067a7091442f14b6c7d8dc9f9d8a9ca59
SHA512 fd8975d5aa4e1d64a7d4773939c393ac40599c849c28673e7b104ee4ccbdf1eea9b3a92222a417eb9c6717a3a72cfd41129a6b4238770d8f8d62d9b5bb962027
SSDEEP 768:Nzj1JegVa3Gry+uELEmITCs/NUZ6nZdYbCLECkrQoP9fmF2f1cOGuz:NWQa2TLEmITcoQxfllfmS1cO3
MD5 SHA1 SHA512 SSDEEP

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memory/4192-0-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4192-11-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4616-13-0x0000000000400000-0x0000000000422000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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