beefa8b66319f9f9e918e9b59f2abd98d5edd82d714f17072894e572ec003e98

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

Processes:

harst.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SRDSLZ\Parameters\ServiceDll = "C:\\Program Files (x86)\\259395638.dll"	harst.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
2604	cmd.exe

Executes dropped EXE 1 IoCs

Processes:

SRDSLZ.exe

pid	Process
2892	SRDSLZ.exe

Loads dropped DLL 7 IoCs

Processes:

harst.exesvchost.exeSRDSLZ.exe

pid	Process
1088	harst.exe
1640	svchost.exe
1640	svchost.exe
2892	SRDSLZ.exe
2892	SRDSLZ.exe
2892	SRDSLZ.exe
2892	SRDSLZ.exe

Creates a Windows Service
persistence

Drops file in System32 directory 2 IoCs

Processes:

svchost.exe

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

Processes:

harst.exe

description	ioc	Process
File created	C:\Program Files (x86)\259395638.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

Processes:

PING.EXE

pid	Process
3068	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

harst.exe

pid	Process
1088	harst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

harst.exe

description	pid	Process
Token: SeIncBasePriorityPrivilege	1088	harst.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

harst.exe

pid	Process
1088	harst.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

harst.execmd.exesvchost.exe

description	pid	Process	procid_target
PID 1088 wrote to memory of 2604	1088	harst.exe	30
PID 1088 wrote to memory of 2604	1088	harst.exe	30
PID 1088 wrote to memory of 2604	1088	harst.exe	30
PID 1088 wrote to memory of 2604	1088	harst.exe	30
PID 2604 wrote to memory of 3068	2604	cmd.exe	32
PID 2604 wrote to memory of 3068	2604	cmd.exe	32
PID 2604 wrote to memory of 3068	2604	cmd.exe	32
PID 2604 wrote to memory of 3068	2604	cmd.exe	32
PID 1640 wrote to memory of 2892	1640	svchost.exe	33
PID 1640 wrote to memory of 2892	1640	svchost.exe	33
PID 1640 wrote to memory of 2892	1640	svchost.exe	33
PID 1640 wrote to memory of 2892	1640	svchost.exe	33

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:1088
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2604
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 1
    3⤵
    - Runs ping.exe
    PID:3068

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SRDSLZ"
1⤵
PID:1648

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:1640
- C:\Windows\SysWOW64\SRDSLZ.exe
  C:\Windows\system32\SRDSLZ.exe "c:\program files (x86)\259395638.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Program Files (x86)\259395638.dll

Filesize
33KB

MD5
cfe61ee50c917c587a08fd4ac5b61849

SHA1
770e76f7cdeea081f7cca0a0ebea7f8231186398

SHA256
54077b9108eb2d7c4a539e553fe2071b44698cdb39da6ef59c64025cf1111906

SHA512
686aa2a6ddcda9640b1159dd56344601189f1fa78e72866d12902811a3ac67bb6f324d7588ebf6b2b79f6bfe9d92015298c1b0bc8858234027301bf2a0b67ddc

Download Submit
\Windows\SysWOW64\SRDSLZ.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