72a29552834c59b6c49d08e3e75a31d517531edc9fdf2b50f96ebe6fbc6de14b

Analysis

max time kernel
148s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2024, 20:48

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General

Target

548b99c7ec0059f88b2cfb3028ac71e1.exe
Size

46KB
MD5

548b99c7ec0059f88b2cfb3028ac71e1
SHA1

78a869e6e4c2e9bf3a51d63917f470569d88753b
SHA256

72a29552834c59b6c49d08e3e75a31d517531edc9fdf2b50f96ebe6fbc6de14b
SHA512

11437c73d6ca52abe6a699f63b76ede2fc9361d14c0555cf8e5fb0e0dbb7a5ce06f20bc594808073f48ec0128707b903cfe8374ed2e2a823b85eeaa2e79fe42e
SSDEEP

768:Ps+M1PzSw++TvQJHsHkiKLMB/p68VszmHAqs9wqv/+P7GzkRt/qL/Co03TCkDLHx:0+aSNZJXibNjM9wI/M7Gzk72/CpDCuR

Score

8^/10

persistence

Malware Config

Signatures

Sets service image path in 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\kusn33sd\ImagePath = "C:\\Windows\\system32\\kusn33sd.exe -j"	548b99c7ec0059f88b2cfb3028ac71e1.exe

Executes dropped EXE 1 IoCs

pid	Process
4220	kusn33sd.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\kusn33sd.exe	548b99c7ec0059f88b2cfb3028ac71e1.exe
File created	C:\Windows\SysWOW64\kusn33sd.exe	kusn33sd.exe
File created	C:\Windows\SysWOW64\KillMe.bat	548b99c7ec0059f88b2cfb3028ac71e1.exe
File created	C:\Windows\SysWOW64\kusn433sd3.dll	kusn33sd.exe
File created	C:\Windows\SysWOW64\kusn33sd.exe	548b99c7ec0059f88b2cfb3028ac71e1.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1196	548b99c7ec0059f88b2cfb3028ac71e1.exe
1196	548b99c7ec0059f88b2cfb3028ac71e1.exe
4220	kusn33sd.exe
4220	kusn33sd.exe
4220	kusn33sd.exe
4220	kusn33sd.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1196 wrote to memory of 2116	1196	548b99c7ec0059f88b2cfb3028ac71e1.exe	91
PID 1196 wrote to memory of 2116	1196	548b99c7ec0059f88b2cfb3028ac71e1.exe	91
PID 1196 wrote to memory of 2116	1196	548b99c7ec0059f88b2cfb3028ac71e1.exe	91

C:\Users\Admin\AppData\Local\Temp\548b99c7ec0059f88b2cfb3028ac71e1.exe
"C:\Users\Admin\AppData\Local\Temp\548b99c7ec0059f88b2cfb3028ac71e1.exe"
1⤵
- Sets service image path in registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\system32\KillMe.bat
  2⤵
  PID:2116

C:\Windows\SysWOW64\kusn33sd.exe
C:\Windows\SysWOW64\kusn33sd.exe -j
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:4220

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\KillMe.bat

Filesize
211B

MD5
a70d574e50ec7509658f838fdf3cbd2e

SHA1
cf4d17cd835749c42fc112e00c3b19de113ab2b0

SHA256
441990fab5b65344230738fbbd033eaeac6f5e835924600c987362911f8d01c7

SHA512
6773ef498479926a24085cad5f1e1ab2aae2091c5ac165dae13afbbd13cb82e2a4d5f2c6fd5258843c3caf38e160eced1798ade0fbfc5f534058936c3dbd45d5

Download Submit
C:\Windows\SysWOW64\kusn33sd.exe

Filesize
46KB

MD5
548b99c7ec0059f88b2cfb3028ac71e1

SHA1
78a869e6e4c2e9bf3a51d63917f470569d88753b

SHA256
72a29552834c59b6c49d08e3e75a31d517531edc9fdf2b50f96ebe6fbc6de14b

SHA512
11437c73d6ca52abe6a699f63b76ede2fc9361d14c0555cf8e5fb0e0dbb7a5ce06f20bc594808073f48ec0128707b903cfe8374ed2e2a823b85eeaa2e79fe42e

Download Submit
memory/1196-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1196-1-0x00000000004F0000-0x00000000004F1000-memory.dmp

Filesize
4KB

Download
memory/1196-10-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4220-5-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4220-6-0x0000000000540000-0x0000000000580000-memory.dmp

Filesize
256KB

Download
memory/4220-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download