4b94e9f1da7c1aefbc420bb442965fd4a1fc7754e84e48d0d88b5dd8b1c96305

Analysis

max time kernel
142s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 19:33

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General

Target

3843d5b57aa9007c7397cb2d8bcf27a1.exe
Size

113KB
MD5

3843d5b57aa9007c7397cb2d8bcf27a1
SHA1

46ee3c26c7b156f8e9349274267a444657746c64
SHA256

4b94e9f1da7c1aefbc420bb442965fd4a1fc7754e84e48d0d88b5dd8b1c96305
SHA512

0159853427070db5406a5fd5ec69614481e88b55f578b0254b221fad2b06e3bda6a0a333b9b6ba06674f42f543cdd8f8f93f9f9f0ba2ec36221ddaeeb7ef865c
SSDEEP

768:k/tPn4dbA6+EjxxlBIubcVY/uT19d4JguMmenP/Q2V7LTPmvkJQtWk7sapBtABM2:sZoc6+WfIhZhkJcmmAGJQg2WwB5BT4R

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\FastUserSwitchingCompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\FastUv32.dll"	3843d5b57aa9007c7397cb2d8bcf27a1.exe

Deletes itself 1 IoCs

pid	Process
2068	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2992	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\ndismgr.sys	3843d5b57aa9007c7397cb2d8bcf27a1.exe
File opened for modification	C:\Windows\SysWOW64\FastUv32.dll	3843d5b57aa9007c7397cb2d8bcf27a1.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
476	Process not Found

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe
Token: SeLoadDriverPrivilege	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe
Token: SeIncBasePriorityPrivilege	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 2068	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe	18
PID 1620 wrote to memory of 2068	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe	18
PID 1620 wrote to memory of 2068	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe	18
PID 1620 wrote to memory of 2068	1620	3843d5b57aa9007c7397cb2d8bcf27a1.exe	18

C:\Users\Admin\AppData\Local\Temp\3843d5b57aa9007c7397cb2d8bcf27a1.exe
"C:\Users\Admin\AppData\Local\Temp\3843d5b57aa9007c7397cb2d8bcf27a1.exe"
1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\3843D5~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2068

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:2992

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

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Downloads

\Windows\SysWOW64\FastUv32.dll

Filesize
52KB

MD5
239017a7212d717c21f790e851b42ded

SHA1
96aff3608606cf8d581b4786b7934da3e72cd59d

SHA256
999bb84db5b22609c0b2e122313a90fb1ade5e4231d12e7c076b650bf543b80b

SHA512
a485f45234673fd6342bff98c0b93ef5dcf6e7cfe20a8d726632451034d1b1270619be984320d19b577f0474556730e65b4b3b91ad7738842a06e0587b05330f

Download Submit
memory/1620-0-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1620-9-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads