12f67bc3609350baf1db63934abe3db86523574a3dc3587e2b2727b5681302f6

General

Target

12f67bc3609350baf1db63934abe3db86523574a3dc3587e2b2727b5681302f6.dll
Size

62KB
MD5

7778309ac53566c636ccddebeb2116d0
SHA1

b685a2dc2c1c918251710fd681062c3d77e28e7d
SHA256

12f67bc3609350baf1db63934abe3db86523574a3dc3587e2b2727b5681302f6
SHA512

b89b6f9de7473ee5d8914805b337c682541ba9fcb163e381ae1ab17be1f417187ccbe46d8419d1c9579b1b47107ad01011b6fa69173f2467ec4fca727e8841a4
SSDEEP

1536:GnNBbq4+CSvXceTPa0T6iN7X8Nek/8FKevXlS:+Dm4+CKMtO6iNMt8FvX

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	4920	rundll32.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1452	CS16Launcher.exe

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

System Information Discovery
T1082

Kills process with taskkill 3 IoCs

evasion

pid	Process
3564	taskkill.exe
4172	taskkill.exe
2128	taskkill.exe

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	CS16Launcher.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	CS16Launcher.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\IESettingSync	CS16Launcher.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	CS16Launcher.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1452	CS16Launcher.exe
1452	CS16Launcher.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3564	taskkill.exe
Token: SeDebugPrivilege	4172	taskkill.exe
Token: SeDebugPrivilege	2128	taskkill.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1452	CS16Launcher.exe
1452	CS16Launcher.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 4920	4864	rundll32.exe	83
PID 4864 wrote to memory of 4920	4864	rundll32.exe	83
PID 4864 wrote to memory of 4920	4864	rundll32.exe	83
PID 4920 wrote to memory of 4092	4920	rundll32.exe	84
PID 4920 wrote to memory of 4092	4920	rundll32.exe	84
PID 4920 wrote to memory of 4092	4920	rundll32.exe	84
PID 4092 wrote to memory of 3564	4092	cmd.exe	86
PID 4092 wrote to memory of 3564	4092	cmd.exe	86
PID 4092 wrote to memory of 3564	4092	cmd.exe	86
PID 4092 wrote to memory of 4172	4092	cmd.exe	87
PID 4092 wrote to memory of 4172	4092	cmd.exe	87
PID 4092 wrote to memory of 4172	4092	cmd.exe	87
PID 4092 wrote to memory of 2128	4092	cmd.exe	88
PID 4092 wrote to memory of 2128	4092	cmd.exe	88
PID 4092 wrote to memory of 2128	4092	cmd.exe	88
PID 4092 wrote to memory of 1452	4092	cmd.exe	89
PID 4092 wrote to memory of 1452	4092	cmd.exe	89
PID 4092 wrote to memory of 1452	4092	cmd.exe	89

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\12f67bc3609350baf1db63934abe3db86523574a3dc3587e2b2727b5681302f6.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\12f67bc3609350baf1db63934abe3db86523574a3dc3587e2b2727b5681302f6.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Suspicious use of WriteProcessMemory
  PID:4920
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c cs16r2.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4092
  - - C:\Windows\SysWOW64\taskkill.exe
      TASKKILL /FI "STATUS eq RUNNING" /IM "rundll32.exe" /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3564
  - - C:\Windows\SysWOW64\taskkill.exe
      TASKKILL /FI "STATUS eq NOT RESPONDING" /IM "rundll32.exe" /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4172
  - - C:\Windows\SysWOW64\taskkill.exe
      TASKKILL /FI "STATUS eq UNKNOWN" /IM "rundll32.exe" /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2128
  - - C:\Users\Admin\AppData\Local\Temp\CS16Launcher.exe
      CS16Launcher.exe
      4⤵
      Executes dropped EXE
      Modifies Internet Explorer settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of SetWindowsHookEx
      PID:1452

Network

MITRE ATT&CK Enterprise v6

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

C:\Users\Admin\AppData\Local\Temp\CS16Launcher.exe

Filesize
2.3MB

MD5
1875f43c02db112f5a532fd49d37394a

SHA1
bec20bed918ffc6f667d670ff784d1872744af3b

SHA256
6ff69a1927b142cac353f444e00def83ee06fbcf078409b4e7667543f386fb7a

SHA512
54b8fcd44dfd7597649f7a95fc3a4a166ff865101746bca6200a2d4953e8418eeb512d7e476f9eeb0b4ad601097c0f9d3c8cd563a6ffa753d4692e8a1b5b6519

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C:\Users\Admin\AppData\Local\Temp\CS16Launcher.exe

Filesize
2.3MB

MD5
1875f43c02db112f5a532fd49d37394a

SHA1
bec20bed918ffc6f667d670ff784d1872744af3b

SHA256
6ff69a1927b142cac353f444e00def83ee06fbcf078409b4e7667543f386fb7a

SHA512
54b8fcd44dfd7597649f7a95fc3a4a166ff865101746bca6200a2d4953e8418eeb512d7e476f9eeb0b4ad601097c0f9d3c8cd563a6ffa753d4692e8a1b5b6519

Download Submit
C:\Users\Admin\AppData\Local\Temp\cs16r2.bat

Filesize
991B

MD5
f0cb13b3a1891b5637b27a30b267c211

SHA1
2b819d5a84e447f6b8ca6ad5da846e81d7ef15bb

SHA256
5a4c82f579ce4938ac5eb41962315a2d91be3417ff7e7720abacff227ff99a8b

SHA512
add983bdce8fb79521efd72bdc6fac34c979215ed40e05ce162dc5d039a0a548eea920a6bc4890601e89882c38a5fd84efefcaa8b28c75f3ba9bc31cb49e2665

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Analysis

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