72395ec1a48758a005d052d72fde286c083be13110308fdc4216bd8e9c325de7

Analysis

max time kernel
34s
max time network
42s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
11-06-2024 19:54

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General

Target

harst.exe
Size

76KB
MD5

2533de08d221342961e8f5382fd0357a
SHA1

dabe6e7b5866e9742c08786352817156e80fe7f6
SHA256

beefa8b66319f9f9e918e9b59f2abd98d5edd82d714f17072894e572ec003e98
SHA512

83124312a2102fd3359a5ff46015a488b845cf533909101d82dc16139378da949479d8490ce27524150c73c896c4b5ce2277fcc115883d20b540dc1708357562
SSDEEP

768:Z1zRSL+BoBxN9tpdC7EezJ0d8hPUtrFRtFtg3NojiwvuccA4iiKahtAZchhD6EWr:l3oBdk7ESuqhParNMKnFfiroZchxfSF

Score

8^/10

persistence

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SRDSLZ\Parameters\ServiceDll = "C:\\Program Files (x86)\\240603437.dll"	harst.exe

Executes dropped EXE 1 IoCs

pid	Process
2348	SRDSLZ.exe

Loads dropped DLL 3 IoCs

pid	Process
4432	harst.exe
4860	svchost.exe
2348	SRDSLZ.exe

Creates a Windows Service
persistence

Drops file in System32 directory 2 IoCs

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

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\240603437.dll	harst.exe

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1476	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4432	harst.exe
4432	harst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4432	harst.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4432	harst.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 4856	4432	harst.exe	79
PID 4432 wrote to memory of 4856	4432	harst.exe	79
PID 4432 wrote to memory of 4856	4432	harst.exe	79
PID 4856 wrote to memory of 1476	4856	cmd.exe	81
PID 4856 wrote to memory of 1476	4856	cmd.exe	81
PID 4856 wrote to memory of 1476	4856	cmd.exe	81
PID 4860 wrote to memory of 2348	4860	svchost.exe	82
PID 4860 wrote to memory of 2348	4860	svchost.exe	82
PID 4860 wrote to memory of 2348	4860	svchost.exe	82

C:\Users\Admin\AppData\Local\Temp\harst.exe
"C:\Users\Admin\AppData\Local\Temp\harst.exe"
1⤵
- Sets DLL path for service in the registry
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4432
- 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\harst.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4856
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 1
    3⤵
    - Runs ping.exe
    PID:1476

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SRDSLZ"
1⤵
PID:3836

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SRDSLZ"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Windows\SysWOW64\SRDSLZ.exe
  C:\Windows\system32\SRDSLZ.exe "c:\program files (x86)\240603437.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\240603437.dll

Filesize
33KB

MD5
cfe61ee50c917c587a08fd4ac5b61849

SHA1
770e76f7cdeea081f7cca0a0ebea7f8231186398

SHA256
54077b9108eb2d7c4a539e553fe2071b44698cdb39da6ef59c64025cf1111906

SHA512
686aa2a6ddcda9640b1159dd56344601189f1fa78e72866d12902811a3ac67bb6f324d7588ebf6b2b79f6bfe9d92015298c1b0bc8858234027301bf2a0b67ddc

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

Filesize
40KB

MD5
22bb5bd901d8b25ac5b41edbb7d5053e

SHA1
8a935dd8d7e104fc553ff7e8b54a404f7b079334

SHA256
8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e

SHA512
cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7

Download Submit