beefa8b66319f9f9e918e9b59f2abd98d5edd82d714f17072894e572ec003e98

Analysis

max time kernel
140s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11-06-2024 19:59

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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)\\240602296.dll"	harst.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	harst.exe

Executes dropped EXE 1 IoCs

pid	Process
4036	SRDSLZ.exe

Loads dropped DLL 3 IoCs

pid	Process
224	harst.exe
812	svchost.exe
4036	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)\240602296.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
1080	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
224	harst.exe
224	harst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	224	harst.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
224	harst.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 224 wrote to memory of 2352	224	harst.exe	84
PID 224 wrote to memory of 2352	224	harst.exe	84
PID 224 wrote to memory of 2352	224	harst.exe	84
PID 2352 wrote to memory of 1080	2352	cmd.exe	86
PID 2352 wrote to memory of 1080	2352	cmd.exe	86
PID 2352 wrote to memory of 1080	2352	cmd.exe	86
PID 812 wrote to memory of 4036	812	svchost.exe	91
PID 812 wrote to memory of 4036	812	svchost.exe	91
PID 812 wrote to memory of 4036	812	svchost.exe	91

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
- Checks computer location settings
- 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:224
- 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:2352
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 1
    3⤵
    - Runs ping.exe
    PID:1080

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SRDSLZ"
1⤵
PID:1984

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:812
- C:\Windows\SysWOW64\SRDSLZ.exe
  C:\Windows\system32\SRDSLZ.exe "c:\program files (x86)\240602296.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:4036

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\240602296.dll

Filesize
33KB

MD5
cfe61ee50c917c587a08fd4ac5b61849

SHA1
770e76f7cdeea081f7cca0a0ebea7f8231186398

SHA256
54077b9108eb2d7c4a539e553fe2071b44698cdb39da6ef59c64025cf1111906

SHA512
686aa2a6ddcda9640b1159dd56344601189f1fa78e72866d12902811a3ac67bb6f324d7588ebf6b2b79f6bfe9d92015298c1b0bc8858234027301bf2a0b67ddc

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C:\Windows\SysWOW64\SRDSLZ.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit