84cb61ac98670cc49f919940bc54461c00223ac74fc5b01581b450d89cfe5ab1

Analysis

max time kernel
300s
max time network
296s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/08/2026, 02:55

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General

Target
pdfcore8.dll
Size 5.5MB
Sample260815-denv1sysfs
SHA256 84cb61ac98670cc49f919940bc54461c00223ac74fc5b01581b450d89cfe5ab1
MD5 f168e1a06b5f8a380bd11edc5ecfc2b1
SHA1 fe4209bef744b93ac05d0b9d7e377e62dd6a1e5f
SHA512 3ed7b91952d04d9d117ce9ad14cd8b082412f10cdc41d83f8ca7e17a04955e9243ada87d3e02049f9b3d98e7cc55ed3b51b7062d3610707fe710c7a05be2f1f4
SSDEEP 98304:HZ450y5i1sSv66fjpSBRzPTq0+LToBoa+A7Z4OiZrq1DfPHNADtV6v+zM+rwroDH:HaT8iRzPTq0+QBFt7Z4O7NADtV6v+zZE
TLSH
T18146CF173E5C00A6E05A1133CEA9B6E8F1AEBDF83B76019715A0BB1DFD32741CA1456B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

defense_evasion discovery execution

Malware Config

Signatures

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
7	2796	rundll32.exe
9	2796	rundll32.exe
10	2796	rundll32.exe
11	2796	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4188	rundll32.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\D:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe

Looks up external IP address via web service 1 TTPs 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	api.ipify.org
10	api.ipify.org

Discovers running processes 1 TTPs 5 IoCs

Running process information can be used to identify security tools or plan follow-on actions.

discovery

Process Discovery

T1057

pid	Process
1696	tasklist.exe
5608	tasklist.exe
2196	tasklist.exe
4608	tasklist.exe
5720	tasklist.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rundll32.exe	rundll32.exe

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
6012	cmd.exe
4916	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 20 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	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe

Delays execution with timeout.exe 5 IoCs

defense_evasion

pid	Process
2916	timeout.exe
2028	timeout.exe
4860	timeout.exe
5904	timeout.exe
2840	timeout.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
2400	taskkill.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeDebugPrivilege	2400	taskkill.exe
Token: SeDebugPrivilege	2196	tasklist.exe
Token: SeDebugPrivilege	2796	rundll32.exe
Token: SeLoadDriverPrivilege	2796	rundll32.exe
Token: SeTakeOwnershipPrivilege	2796	rundll32.exe
Token: SeIncBasePriorityPrivilege	2796	rundll32.exe
Token: SeTcbPrivilege	2796	rundll32.exe
Token: SeDebugPrivilege	2796	rundll32.exe
Token: SeCreateTokenPrivilege	2796	rundll32.exe
Token: SeAssignPrimaryTokenPrivilege	2796	rundll32.exe
Token: SeLockMemoryPrivilege	2796	rundll32.exe
Token: SeIncreaseQuotaPrivilege	2796	rundll32.exe
Token: SeMachineAccountPrivilege	2796	rundll32.exe
Token: SeTcbPrivilege	2796	rundll32.exe
Token: SeSecurityPrivilege	2796	rundll32.exe
Token: SeTakeOwnershipPrivilege	2796	rundll32.exe
Token: SeLoadDriverPrivilege	2796	rundll32.exe
Token: SeSystemProfilePrivilege	2796	rundll32.exe
Token: SeSystemtimePrivilege	2796	rundll32.exe
Token: SeProfSingleProcessPrivilege	2796	rundll32.exe
Token: SeIncBasePriorityPrivilege	2796	rundll32.exe
Token: SeCreatePagefilePrivilege	2796	rundll32.exe
Token: SeCreatePermanentPrivilege	2796	rundll32.exe
Token: SeBackupPrivilege	2796	rundll32.exe
Token: SeRestorePrivilege	2796	rundll32.exe
Token: SeShutdownPrivilege	2796	rundll32.exe
Token: SeDebugPrivilege	2796	rundll32.exe
Token: SeAuditPrivilege	2796	rundll32.exe
Token: SeSystemEnvironmentPrivilege	2796	rundll32.exe
Token: SeChangeNotifyPrivilege	2796	rundll32.exe
Token: SeRemoteShutdownPrivilege	2796	rundll32.exe
Token: SeUndockPrivilege	2796	rundll32.exe
Token: SeSyncAgentPrivilege	2796	rundll32.exe
Token: SeEnableDelegationPrivilege	2796	rundll32.exe
Token: SeManageVolumePrivilege	2796	rundll32.exe
Token: SeImpersonatePrivilege	2796	rundll32.exe
Token: SeCreateGlobalPrivilege	2796	rundll32.exe
Token: 31	2796	rundll32.exe
Token: 32	2796	rundll32.exe
Token: 33	2796	rundll32.exe
Token: 34	2796	rundll32.exe
Token: 35	2796	rundll32.exe
Token: SeDebugPrivilege	4608	tasklist.exe
Token: SeDebugPrivilege	5720	tasklist.exe
Token: SeDebugPrivilege	1696	tasklist.exe
Token: SeDebugPrivilege	5608	tasklist.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2796	rundll32.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2796	1152	rundll32.exe	88
PID 2796 wrote to memory of 2400	2796	rundll32.exe	89
PID 2796 wrote to memory of 6012	2796	rundll32.exe	92
PID 6012 wrote to memory of 4916	6012	cmd.exe	94
PID 4916 wrote to memory of 2196	4916	cmd.exe	95
PID 4916 wrote to memory of 2404	4916	cmd.exe	96
PID 4916 wrote to memory of 4860	4916	cmd.exe	97
PID 4916 wrote to memory of 4608	4916	cmd.exe	101
PID 4916 wrote to memory of 5668	4916	cmd.exe	102
PID 4916 wrote to memory of 5904	4916	cmd.exe	103
PID 4916 wrote to memory of 5720	4916	cmd.exe	104
PID 4916 wrote to memory of 3736	4916	cmd.exe	105
PID 4916 wrote to memory of 2840	4916	cmd.exe	106
PID 4916 wrote to memory of 1696	4916	cmd.exe	107
PID 4916 wrote to memory of 2700	4916	cmd.exe	108
PID 4916 wrote to memory of 2916	4916	cmd.exe	109
PID 4916 wrote to memory of 5608	4916	cmd.exe	110
PID 4916 wrote to memory of 5700	4916	cmd.exe	111
PID 4916 wrote to memory of 2028	4916	cmd.exe	112

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\pdfcore8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\pdfcore8.dll,#1
  2⤵
  - Badlisted process makes network request
  - Enumerates connected drives
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im cmd.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2400
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /c start "" /B cmd /C C:\Users\Admin\AppData\Local\Temp\BC2411DEE9DC\BC2411DEE9DC.CMD
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:6012
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /C C:\Users\Admin\AppData\Local\Temp\BC2411DEE9DC\BC2411DEE9DC.CMD
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4916
    - - C:\Windows\SysWOW64\tasklist.exe
        
        TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
        5⤵
        Discovers running processes
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:2196
    - - C:\Windows\SysWOW64\find.exe
        
        FIND /I "rundll32.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2404
    - - C:\Windows\SysWOW64\timeout.exe
        
        TIMEOUT /t 60 /nobreak
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:4860
    - - C:\Windows\SysWOW64\tasklist.exe
        
        TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
        5⤵
        Discovers running processes
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:4608
    - - C:\Windows\SysWOW64\find.exe
        
        FIND /I "rundll32.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:5668
    - - C:\Windows\SysWOW64\timeout.exe
        
        TIMEOUT /t 60 /nobreak
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:5904
    - - C:\Windows\SysWOW64\tasklist.exe
        
        TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
        5⤵
        Discovers running processes
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:5720
    - - C:\Windows\SysWOW64\find.exe
        
        FIND /I "rundll32.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3736
    - - C:\Windows\SysWOW64\timeout.exe
        
        TIMEOUT /t 60 /nobreak
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:2840
    - - C:\Windows\SysWOW64\tasklist.exe
        
        TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
        5⤵
        Discovers running processes
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1696
    - - C:\Windows\SysWOW64\find.exe
        
        FIND /I "rundll32.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2700
    - - C:\Windows\SysWOW64\timeout.exe
        
        TIMEOUT /t 60 /nobreak
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:2916
    - - C:\Windows\SysWOW64\tasklist.exe
        
        TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
        5⤵
        Discovers running processes
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:5608
    - - C:\Windows\SysWOW64\find.exe
        
        FIND /I "rundll32.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:5700
    - - C:\Windows\SysWOW64\timeout.exe
        
        TIMEOUT /t 60 /nobreak
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:2028

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4188

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Process Discovery

T1057

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

BC2411DEE9DC.CMD

Path C:\Users\Admin\AppData\Local\Temp\BC2411DEE9DC\BC2411DEE9DC.CMD
Size 1KB
SHA256 c7b7ec48b10bb7b6b7aa5a435d14bab9cf73297e434330e56ffc9aad46a43b39
MD5 5f7af06cbdf33b784437092bd2f824e8
SHA1 256839c8d6fad606d462c985ad155e96369e587c
SHA512 2c3c2a9d2c02884359079604b7c3b833e2026ebf38edc836581528df80ca6755d8afd34ebb2e4c3c7aaa29a11f4db13a018988581b4d7457c3b72deb8a5b5ad1
TLSH
T1E431F48EC4074E1D431442EF1786DC9FC650E047FE9571D0B9D89B8523C598D09A6BED
MD5 SHA1 SHA512 TLSH

Submit Download

rundll32.exe

Path C:\Windows\SysWOW64\rundll32.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2796-6-0x00000000044B0000-0x0000000004508000-memory.dmp

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memory/2796-8-0x00000000044B0000-0x0000000004508000-memory.dmp

Download

memory/2796-9-0x00000000044B0000-0x0000000004508000-memory.dmp

Download

memory/2796-10-0x00000000044B0000-0x0000000004508000-memory.dmp

Download

memory/2796-11-0x00000000044B0000-0x0000000004508000-memory.dmp

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