c96b41fac848211321861fcf957e5f475a950c56f9024f792e5c9584f1fbd3ef

Analysis

max time kernel
299s
max time network
266s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22/11/2024, 03:36

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General

Target
pclock.exe
Size 239KB
Sample241122-d54ddstney
SHA256 302b437cf639368e85af4d16b2ba11707f5e94d257e5718be7f913c7162bf954
MD5 bb9c3be8f8ee44993bc2ed175abcaf1b
SHA1 fee3a493cbfc84799c1e6c2c3b7d84e84433578d
SHA512 c4dddee9db4929ec00d3344ecd748c4cf41a516489f39eac9ffe159dba8058b5d2ac23f47edbdb0cd310793699af3631d6b3577fdba59efe599dfc81d12f6837
SSDEEP 3072:3Nkgq5A+T73rKiwT6ChOe97tauWx/7PaoHdWOGNKbZNM4rfnxl1YWOFW+OKd:mR3a6CrXWx/7ao9aKbQ4rycKd
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

discovery persistence upx

Malware Config

Signatures

Executes dropped EXE 4 IoCs

pid	Process
2036	WinFaxViewer.exe
3060	WinFaxViewer.exe
2444	winhub.exe
2988	winhub.exe

Loads dropped DLL 7 IoCs

pid	Process
1128	pclock.exe
1128	pclock.exe
1128	pclock.exe
1128	pclock.exe
2036	WinFaxViewer.exe
3060	WinFaxViewer.exe
3060	WinFaxViewer.exe

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\wincl = "C:\\Users\\Public\\WinHub\\winhub.exe"	WinFaxViewer.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1688 set thread context of 1128	1688	pclock.exe	30
PID 2036 set thread context of 3060	2036	WinFaxViewer.exe	32
PID 2444 set thread context of 2988	2444	winhub.exe	37

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral25/memory/1128-1-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-3-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-7-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-2-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-11-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-9-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/3060-47-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/3060-46-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2036-45-0x0000000000280000-0x00000000002C0000-memory.dmp	upx
behavioral25/memory/1128-41-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/3060-73-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-68-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-77-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-78-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-80-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-82-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/1128-103-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-109-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-110-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral25/memory/2988-117-0x0000000000400000-0x0000000000450000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pclock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pclock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinFaxViewer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinFaxViewer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winhub.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2832	taskkill.exe

Script User-Agent 8 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	12	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	13	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	14	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	7	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	9	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	10	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	11	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	taskkill.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1128	pclock.exe
3060	WinFaxViewer.exe
2988	winhub.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1688 wrote to memory of 1128	1688	pclock.exe	30
PID 1128 wrote to memory of 2036	1128	pclock.exe	31
PID 1128 wrote to memory of 2036	1128	pclock.exe	31
PID 1128 wrote to memory of 2036	1128	pclock.exe	31
PID 1128 wrote to memory of 2036	1128	pclock.exe	31
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 2036 wrote to memory of 3060	2036	WinFaxViewer.exe	32
PID 3060 wrote to memory of 2832	3060	WinFaxViewer.exe	33
PID 3060 wrote to memory of 2832	3060	WinFaxViewer.exe	33
PID 3060 wrote to memory of 2832	3060	WinFaxViewer.exe	33
PID 3060 wrote to memory of 2832	3060	WinFaxViewer.exe	33
PID 3060 wrote to memory of 2444	3060	WinFaxViewer.exe	36
PID 3060 wrote to memory of 2444	3060	WinFaxViewer.exe	36
PID 3060 wrote to memory of 2444	3060	WinFaxViewer.exe	36
PID 3060 wrote to memory of 2444	3060	WinFaxViewer.exe	36
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37
PID 2444 wrote to memory of 2988	2444	winhub.exe	37

C:\Users\Admin\AppData\Local\Temp\pclock.exe
"C:\Users\Admin\AppData\Local\Temp\pclock.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Local\Temp\pclock.exe
  "C:\Users\Admin\AppData\Local\Temp\pclock.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1128
- - C:\Users\Admin\AppData\Local\Temp\WinFaxViewer.exe
    "C:\Users\Admin\AppData\Local\Temp\WinFaxViewer.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2036
  - - C:\Users\Admin\AppData\Local\Temp\WinFaxViewer.exe
      "C:\Users\Admin\AppData\Local\Temp\WinFaxViewer.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3060
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /F /IM criminal_case_against_you.scr
        5⤵
        System Location Discovery: System Language Discovery
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2832
    - - C:\Users\Public\WinHub\winhub.exe
        
        "C:\Users\Public\WinHub\winhub.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2444
      - C:\Users\Public\WinHub\winhub.exe
        
        "C:\Users\Public\WinHub\winhub.exe"
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2988

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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WinFaxViewer.exe

Path \Users\Admin\AppData\Local\Temp\WinFaxViewer.exe
Size 239KB
SHA256 302b437cf639368e85af4d16b2ba11707f5e94d257e5718be7f913c7162bf954
MD5 bb9c3be8f8ee44993bc2ed175abcaf1b
SHA1 fee3a493cbfc84799c1e6c2c3b7d84e84433578d
SHA512 c4dddee9db4929ec00d3344ecd748c4cf41a516489f39eac9ffe159dba8058b5d2ac23f47edbdb0cd310793699af3631d6b3577fdba59efe599dfc81d12f6837
SSDEEP 3072:3Nkgq5A+T73rKiwT6ChOe97tauWx/7PaoHdWOGNKbZNM4rfnxl1YWOFW+OKd:mR3a6CrXWx/7ao9aKbQ4rycKd
MD5 SHA1 SHA512 SSDEEP

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memory/1128-41-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-24-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-7-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-2-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-90-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-11-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-9-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-1-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-77-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-32-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-31-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-91-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-103-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1128-92-0x00000000028A0000-0x00000000028E0000-memory.dmp

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memory/1128-3-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/1688-0-0x0000000000400000-0x0000000000440000-memory.dmp

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memory/1688-8-0x0000000000400000-0x0000000000440000-memory.dmp

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memory/2036-44-0x0000000000400000-0x0000000000440000-memory.dmp

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memory/2036-45-0x0000000000280000-0x00000000002C0000-memory.dmp

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memory/2444-61-0x0000000000400000-0x0000000000440000-memory.dmp

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memory/2444-70-0x0000000000400000-0x0000000000440000-memory.dmp

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memory/2988-78-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-68-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-80-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-82-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-109-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-110-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2988-117-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/3060-73-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/3060-59-0x0000000000300000-0x0000000000340000-memory.dmp

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memory/3060-46-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/3060-47-0x0000000000400000-0x0000000000450000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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