9f09d25b2756d813c2e9a1f609504b729cbda76248c0a12061cc15456f56730b

Analysis

max time kernel
150s
max time network
157s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
06/11/2022, 20:43

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General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

148KB
MD5

73a9ab2ea9ec4eaf45bce88afc7ee87e
SHA1

bb8d963421491d6c20ae6082b383ddeebf3981e4
SHA256

9f09d25b2756d813c2e9a1f609504b729cbda76248c0a12061cc15456f56730b
SHA512

34006fdfd74295850185b1c3daf36220ede5bd171241df9f89474fd74df571fe0d432b7e98abdbf284595d69e661eb148e055ac7ca9b8a1bb37960974311ee0e
SSDEEP

3072:tYcIDc20Qr0AGFDRlt98XSPmLmUQuywCXbx:tYlDcVQQAmlltCXEG8f

Score

9^/10

persistence ransomware

Malware Config

Signatures

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bcf8801.exe	explorer.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcf880 = "C:\\bcf8801\\bcf8801.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*cf880 = "C:\\bcf8801\\bcf8801.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\bcf8801 = "C:\\Users\\Admin\\AppData\\Roaming\\bcf8801.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*cf8801 = "C:\\Users\\Admin\\AppData\\Roaming\\bcf8801.exe"	explorer.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Trojan-Ransom.Win32.Blocker.INI	Trojan-Ransom.Win32.Blocker.exe

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1704	vssadmin.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1128	Trojan-Ransom.Win32.Blocker.exe
844	explorer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	632	vssvc.exe
Token: SeRestorePrivilege	632	vssvc.exe
Token: SeAuditPrivilege	632	vssvc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1128	Trojan-Ransom.Win32.Blocker.exe
1128	Trojan-Ransom.Win32.Blocker.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
1128	Trojan-Ransom.Win32.Blocker.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 844	1128	Trojan-Ransom.Win32.Blocker.exe	27
PID 1128 wrote to memory of 844	1128	Trojan-Ransom.Win32.Blocker.exe	27
PID 1128 wrote to memory of 844	1128	Trojan-Ransom.Win32.Blocker.exe	27
PID 1128 wrote to memory of 844	1128	Trojan-Ransom.Win32.Blocker.exe	27
PID 844 wrote to memory of 1936	844	explorer.exe	28
PID 844 wrote to memory of 1936	844	explorer.exe	28
PID 844 wrote to memory of 1936	844	explorer.exe	28
PID 844 wrote to memory of 1936	844	explorer.exe	28
PID 844 wrote to memory of 1704	844	explorer.exe	29
PID 844 wrote to memory of 1704	844	explorer.exe	29
PID 844 wrote to memory of 1704	844	explorer.exe	29
PID 844 wrote to memory of 1704	844	explorer.exe	29

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1128
- C:\Windows\syswow64\explorer.exe
  "C:\Windows\syswow64\explorer.exe"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:844
- - C:\Windows\syswow64\svchost.exe
    -k netsvcs
    3⤵
    PID:1936
- - C:\Windows\syswow64\vssadmin.exe
    vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1704

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Deletion

T1107

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact