3526c74a22a6a7ff285bddc4a055d22e443bd2d9ceb47aa7bc20240256084787

Analysis

max time kernel
1800s
max time network
1800s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26-03-2024 13:44

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General

Target

87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe
Size

155KB
MD5

cc3031638f4aef9c8d4062bb3103140b
SHA1

2f4628c65da5ad001953468c294550b32cca9124
SHA256

87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7
SHA512

939c12b95db960d6c03a879a4ead4e19adcc82c3410d711ed6f955e812eddd86046e3760334843fbc3a22b850dca7878dcbfa6a7e3aa19c9958d5870d13af0cf
SSDEEP

3072:SqhFvhfBQBlLY6hiYbeRMj9JVHThG0HWZlOOPIdLEvJxBroBXPVNPHUWt7outd:SqhFHAYwiYbuu93HThvulZPgLAxB0BXL

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

Processes:

87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explоrer.exe"	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe

Deletes itself 1 IoCs

Processes:

explоrer.exe

pid process

2648 explоrer.exe
Executes dropped EXE 1 IoCs

Processes:

explоrer.exe

pid process

2648 explоrer.exe

pid	process
2648	explоrer.exe

pid	process
2648	explоrer.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral10/memory/756-0-0x0000000000400000-0x0000000000446000-memory.dmp	upx
C:\Windows\explоrer.exe	upx

Drops file in Windows directory 2 IoCs

Processes:

87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe

description	ioc	process
File created	C:\Windows\explоrer.exe	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe
File opened for modification	C:\Windows\explоrer.exe	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe

Modifies Internet Explorer settings 1 TTPs 3 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

iexplore.exe

pid	process
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe
2476	iexplore.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

explоrer.exe

pid process

2648 explоrer.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1540 vssvc.exe
Token: SeRestorePrivilege 1540 vssvc.exe
Token: SeAuditPrivilege 1540 vssvc.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

ctfmon.exe

pid process

1276 ctfmon.exe
1276 ctfmon.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

iexplore.exe

pid process

2476 iexplore.exe
2476 iexplore.exe
2476 iexplore.exe

pid	process
2648	explоrer.exe

description	pid	process
Token: SeBackupPrivilege	1540	vssvc.exe
Token: SeRestorePrivilege	1540	vssvc.exe
Token: SeAuditPrivilege	1540	vssvc.exe

pid	process
1276	ctfmon.exe
1276	ctfmon.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exeexplоrer.exeiexplore.exe

description	pid	process	target process
PID 756 wrote to memory of 2648	756	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe	explоrer.exe
PID 756 wrote to memory of 2648	756	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe	explоrer.exe
PID 756 wrote to memory of 2648	756	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe	explоrer.exe
PID 756 wrote to memory of 2648	756	87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe	explоrer.exe
PID 2648 wrote to memory of 2476	2648	explоrer.exe	iexplore.exe
PID 2648 wrote to memory of 2476	2648	explоrer.exe	iexplore.exe
PID 2648 wrote to memory of 2476	2648	explоrer.exe	iexplore.exe
PID 2648 wrote to memory of 2476	2648	explоrer.exe	iexplore.exe
PID 2476 wrote to memory of 1276	2476	iexplore.exe	ctfmon.exe
PID 2476 wrote to memory of 1276	2476	iexplore.exe	ctfmon.exe
PID 2476 wrote to memory of 1276	2476	iexplore.exe	ctfmon.exe
PID 2476 wrote to memory of 1276	2476	iexplore.exe	ctfmon.exe

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\87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe
"C:\Users\Admin\AppData\Local\Temp\87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\explоrer.exe
"C:\Windows\explоrer.exe" C:\Users\Admin\AppData\Local\Temp\87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7.exe
2⤵
- Deletes itself
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2648

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:2476

C:\Windows\SysWOW64\ctfmon.exe
ctfmon.exe
4⤵
- Suspicious use of FindShellTrayWindow
PID:1276

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1540

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\9ZQLLOZN\ib2[1].htm
Filesize
162B

MD5
4f8e702cc244ec5d4de32740c0ecbd97

SHA1
3adb1f02d5b6054de0046e367c1d687b6cdf7aff

SHA256
9e17cb15dd75bbbd5dbb984eda674863c3b10ab72613cf8a39a00c3e11a8492a

SHA512
21047fea5269fee75a2a187aa09316519e35068cb2f2f76cfaf371e5224445e9d5c98497bd76fb9608d2b73e9dac1a3f5bfadfdc4623c479d53ecf93d81d3c9f

Download Submit
C:\Windows\explоrer.exe
Filesize
155KB

MD5
cc3031638f4aef9c8d4062bb3103140b

SHA1
2f4628c65da5ad001953468c294550b32cca9124

SHA256
87cee50a81408e14f015d7507a87950e678742ba78015fd65d24f9934d22c9c7

SHA512
939c12b95db960d6c03a879a4ead4e19adcc82c3410d711ed6f955e812eddd86046e3760334843fbc3a22b850dca7878dcbfa6a7e3aa19c9958d5870d13af0cf

Download Submit
memory/756-0-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/756-1-0x00000000002C0000-0x00000000002D5000-memory.dmp

Filesize
84KB

Download
memory/756-2-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/756-3-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2648-19-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download