2f374e5118f9e92e31ccfcedbcc05ab7752611b0a7cfe608608ded3c6e8820e2

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30-12-2023 13:14

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

19a0f81b08b13adaa731bdb11321cdca.exe
Size

207KB
MD5

19a0f81b08b13adaa731bdb11321cdca
SHA1

3c75763b4f079cc3033330b4c036395b5fbb23b9
SHA256

2f374e5118f9e92e31ccfcedbcc05ab7752611b0a7cfe608608ded3c6e8820e2
SHA512

2fb1aa563d7a7061aefcec3bfe70c139adee94f56e3fbc6f3a338f5c73915adae5acffd72f0a24ecb2d6784ef4ad6483af85af1c4cb75973a429e07a6f242bee
SSDEEP

6144:aAwl1mTKXPydlHHfMGFMvW5QTPgJ+bLySFoS:ahcTKajHHffMvlTPrfygoS

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\Shell = "explоrer.exe"	19a0f81b08b13adaa731bdb11321cdca.exe

Deletes itself 1 IoCs

pid	Process
2756	explоrer.exe

Executes dropped EXE 1 IoCs

pid	Process
2756	explоrer.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2516-0-0x0000000000400000-0x0000000000463000-memory.dmp	upx
behavioral1/files/0x000e0000000122ec-11.dat	upx
behavioral1/memory/2756-16-0x0000000000400000-0x0000000000463000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\explоrer.exe	19a0f81b08b13adaa731bdb11321cdca.exe
File created	C:\Windows\explоrer.exe	19a0f81b08b13adaa731bdb11321cdca.exe

Modifies Internet Explorer settings 1 TTPs 3 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe
2900	iexplore.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2756	explоrer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	596	vssvc.exe
Token: SeRestorePrivilege	596	vssvc.exe
Token: SeAuditPrivilege	596	vssvc.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2976	ctfmon.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2900	iexplore.exe
2900	iexplore.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2756	2516	19a0f81b08b13adaa731bdb11321cdca.exe	30
PID 2516 wrote to memory of 2756	2516	19a0f81b08b13adaa731bdb11321cdca.exe	30
PID 2516 wrote to memory of 2756	2516	19a0f81b08b13adaa731bdb11321cdca.exe	30
PID 2516 wrote to memory of 2756	2516	19a0f81b08b13adaa731bdb11321cdca.exe	30
PID 2756 wrote to memory of 2900	2756	explоrer.exe	31
PID 2756 wrote to memory of 2900	2756	explоrer.exe	31
PID 2756 wrote to memory of 2900	2756	explоrer.exe	31
PID 2756 wrote to memory of 2900	2756	explоrer.exe	31
PID 2900 wrote to memory of 2976	2900	iexplore.exe	33
PID 2900 wrote to memory of 2976	2900	iexplore.exe	33
PID 2900 wrote to memory of 2976	2900	iexplore.exe	33
PID 2900 wrote to memory of 2976	2900	iexplore.exe	33

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\19a0f81b08b13adaa731bdb11321cdca.exe
"C:\Users\Admin\AppData\Local\Temp\19a0f81b08b13adaa731bdb11321cdca.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\explоrer.exe
  "C:\Windows\explоrer.exe" C:\Users\Admin\AppData\Local\Temp\19a0f81b08b13adaa731bdb11321cdca.exe
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Modifies Internet Explorer settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2900
  - - C:\Windows\SysWOW64\ctfmon.exe
      ctfmon.exe
      4⤵
      Suspicious use of FindShellTrayWindow
      PID:2976

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\YV6H14B0\ib2[1].htm

Filesize
162B

MD5
4f8e702cc244ec5d4de32740c0ecbd97

SHA1
3adb1f02d5b6054de0046e367c1d687b6cdf7aff

SHA256
9e17cb15dd75bbbd5dbb984eda674863c3b10ab72613cf8a39a00c3e11a8492a

SHA512
21047fea5269fee75a2a187aa09316519e35068cb2f2f76cfaf371e5224445e9d5c98497bd76fb9608d2b73e9dac1a3f5bfadfdc4623c479d53ecf93d81d3c9f

Download Submit
C:\Windows\explоrer.exe

Filesize
207KB

MD5
19a0f81b08b13adaa731bdb11321cdca

SHA1
3c75763b4f079cc3033330b4c036395b5fbb23b9

SHA256
2f374e5118f9e92e31ccfcedbcc05ab7752611b0a7cfe608608ded3c6e8820e2

SHA512
2fb1aa563d7a7061aefcec3bfe70c139adee94f56e3fbc6f3a338f5c73915adae5acffd72f0a24ecb2d6784ef4ad6483af85af1c4cb75973a429e07a6f242bee

Download Submit
memory/2516-0-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/2516-1-0x00000000002B0000-0x00000000002C5000-memory.dmp

Filesize
84KB

Download
memory/2516-2-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/2516-3-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/2516-15-0x00000000009F0000-0x0000000000A53000-memory.dmp

Filesize
396KB

Download
memory/2516-14-0x00000000009F0000-0x0000000000A53000-memory.dmp

Filesize
396KB

Download
memory/2756-16-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/2756-23-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download