7757d34ab16584dd4e8e8493cda9b22a3bb60509392c269081ef71ff0de1d9b3

General

Target

unrepellent.exe
Size

244KB
MD5

71db30d5db50af8adec8fa9c24ce9860
SHA1

78f2eba84b5b61886a2444c47ae42ae89efa02d4
SHA256

7757d34ab16584dd4e8e8493cda9b22a3bb60509392c269081ef71ff0de1d9b3
SHA512

f25a0e756e472471ba7c45f01431d2071743611553298138fa6a674493c0254b7c88f255b952a15531572b61a5cbc328693ddea1480630742c97f3c3016b54da
SSDEEP

6144:9EXlSylvFuWaS54hIAv/QhuA7HY8pPZ0FP6BzxM5EmX:eAylvv5YRwh9HYd61xhmX

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\apppatch\\svchost.exe,"	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2572	svchost.exe

Loads dropped DLL 7 IoCs

pid	Process
1724	unrepellent.exe
1724	unrepellent.exe
2172	WerFault.exe
2172	WerFault.exe
2172	WerFault.exe
2172	WerFault.exe
2172	WerFault.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\a8a45f2e = "C:\\Windows\\apppatch\\svchost.exe"	unrepellent.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\a8a45f2e = "C:\\Windows\\apppatch\\svchost.exe"	svchost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\apppatch\svchost.exe	unrepellent.exe
File created	C:\Windows\apppatch\svchost.exe	unrepellent.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2172	2572	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2572	svchost.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1724	unrepellent.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 2572	1724	unrepellent.exe	28
PID 1724 wrote to memory of 2572	1724	unrepellent.exe	28
PID 1724 wrote to memory of 2572	1724	unrepellent.exe	28
PID 1724 wrote to memory of 2572	1724	unrepellent.exe	28
PID 2572 wrote to memory of 2172	2572	svchost.exe	29
PID 2572 wrote to memory of 2172	2572	svchost.exe	29
PID 2572 wrote to memory of 2172	2572	svchost.exe	29
PID 2572 wrote to memory of 2172	2572	svchost.exe	29

C:\Users\Admin\AppData\Local\Temp\unrepellent.exe
"C:\Users\Admin\AppData\Local\Temp\unrepellent.exe"
1⤵
- Loads dropped DLL
- Modifies WinLogon
- Drops file in Windows directory
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\apppatch\svchost.exe
  "C:\Windows\apppatch\svchost.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Modifies WinLogon
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2572 -s 508
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Winlogon Helper DLL

2

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Winlogon Helper DLL

2

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\AppPatch\svchost.exe

Filesize
244KB

MD5
86b41d52b1789111b83bcec93aa064ff

SHA1
ca99932795d9a6a8456e97daa739893c3e4f2a04

SHA256
03a624ebcbd52090e5d22af1265018ca10c06b59549d8921e96eeb216a509282

SHA512
9181aea1a74f57631b8f9fddf935dd532e97ff08c658e2bcf579bc047cc196019bd645f9de5d7e80d48118ae67c73c37266817df5106f0cf44240f10d54bcbd4

Download Submit
memory/1724-20-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/1724-1-0x0000000000220000-0x0000000000288000-memory.dmp

Filesize
416KB

Download
memory/1724-2-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/1724-0-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/1724-19-0x0000000000220000-0x0000000000288000-memory.dmp

Filesize
416KB

Download
memory/2572-22-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/2572-17-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/2572-16-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/2572-29-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/2572-30-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/2572-27-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/2572-25-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/2572-24-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/2572-31-0x00000000004B0000-0x0000000000508000-memory.dmp

Filesize
352KB

Download
memory/2572-33-0x00000000004B0000-0x0000000000508000-memory.dmp

Filesize
352KB

Download
memory/2572-35-0x00000000004B0000-0x0000000000508000-memory.dmp

Filesize
352KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads