0710387a53ee2d45241f35f962168a5317469cd80244c85084f4bfe991495856

Analysis

max time kernel
1s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 04:23

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General

Target

28028a7cd9a23bde1b0029e6148af986.exe
Size

180KB
MD5

28028a7cd9a23bde1b0029e6148af986
SHA1

4a080ad3b399024615f229357847e079c6597af8
SHA256

0710387a53ee2d45241f35f962168a5317469cd80244c85084f4bfe991495856
SHA512

0dc87a51682e4dbceff5006574bab8c75eebd818af7c3599ef628717af7d02cbcd6b82268f15694544fa4725d54a25e5ce952867b292c62d5b2e2030838fa5ee
SSDEEP

3072:F0cdgtALiLfa9o1mytjPGttGYmFbJ5Cc9bBBe9:KOgtBt1h+ttGYWfbu9

Score

10^/10

persistence upx

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"	28028a7cd9a23bde1b0029e6148af986.exe

Executes dropped EXE 1 IoCs

pid	Process
2784	rui.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2784-17-0x0000000000400000-0x0000000000417000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "C:\\Users\\Admin\\rui.exe \\u"	28028a7cd9a23bde1b0029e6148af986.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\userdiff.sav	28028a7cd9a23bde1b0029e6148af986.exe
File created	C:\Windows\SysWOW64\userdiff.sav	28028a7cd9a23bde1b0029e6148af986.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1888 set thread context of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20

Program crash 2 IoCs

pid	pid_target	Process
1840	1264	WerFault.exe
3952	1708	WerFault.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1888 wrote to memory of 1264	1888	28028a7cd9a23bde1b0029e6148af986.exe	20
PID 1264 wrote to memory of 2784	1264	28028a7cd9a23bde1b0029e6148af986.exe	31
PID 1264 wrote to memory of 2784	1264	28028a7cd9a23bde1b0029e6148af986.exe	31
PID 1264 wrote to memory of 2784	1264	28028a7cd9a23bde1b0029e6148af986.exe	31

C:\Users\Admin\AppData\Local\Temp\28028a7cd9a23bde1b0029e6148af986.exe
"C:\Users\Admin\AppData\Local\Temp\28028a7cd9a23bde1b0029e6148af986.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Users\Admin\AppData\Local\Temp\28028a7cd9a23bde1b0029e6148af986.exe
  "C:\Users\Admin\AppData\Local\Temp\28028a7cd9a23bde1b0029e6148af986.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Users\Admin\rui.exe
    \u
    3⤵
    - Executes dropped EXE
    PID:2784
  - - C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      4⤵
      PID:1708
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\3552.bat" "
    3⤵
    PID:4828

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1264 -ip 1264
1⤵
PID:4020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1264 -s 192
1⤵
- Program crash
PID:1840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1708 -s 192
1⤵
- Program crash
PID:3952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1708 -ip 1708
1⤵
PID:2236

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1264-2-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1264-0-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1264-12-0x0000000000590000-0x0000000000591000-memory.dmp

Filesize
4KB

Download
memory/1264-20-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1708-25-0x0000000009900000-0x000000000990E000-memory.dmp

Filesize
56KB

Download
memory/1708-36-0x00000000011F0000-0x00000000011F1000-memory.dmp

Filesize
4KB

Download
memory/1708-37-0x0000000009900000-0x000000000990E000-memory.dmp

Filesize
56KB

Download
memory/1708-35-0x0000000009900000-0x000000000990E000-memory.dmp

Filesize
56KB

Download
memory/2784-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2784-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2784-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads