970720560dfd7943751a84cc89c6361800abb98cb23e9daa66c459cacebd3e92

General

Target
tasks_137.vir.exe
Size 137KB
Sample200719-bcmhak3wca
SHA256 970720560dfd7943751a84cc89c6361800abb98cb23e9daa66c459cacebd3e92
MD5 54a79ec504774ba90fdb75e361ab8273
SHA1 5f9a3d9c66b2a77fc81d6e9b330aa5a8e87b00e4
SHA512 00ab17a16a1ca2dab7ea0a0f65d81945e456a4b0653aa49942dfe67b4916491f4b6885b59fffc35adc756b795526ba1a6ef77a48185c917f71702c83ebeb9275
MD5 SHA1 SHA512

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
1420	winsec.exe
452	ohhuzyh.exe
836	ohhuzyh.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe
836	ohhuzyh.exe

Deletes itself 1 IoCs

pid	Process
736	cmd.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Security Center Update - 3297039994.job	tasks_137.vir.exe

Loads dropped DLL 1 IoCs

pid	Process
608	tasks_137.vir.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 608 wrote to memory of 452	608	tasks_137.vir.exe	25
PID 608 wrote to memory of 452	608	tasks_137.vir.exe	25
PID 608 wrote to memory of 452	608	tasks_137.vir.exe	25
PID 608 wrote to memory of 452	608	tasks_137.vir.exe	25
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 452 wrote to memory of 836	452	ohhuzyh.exe	27
PID 608 wrote to memory of 736	608	tasks_137.vir.exe	26
PID 608 wrote to memory of 736	608	tasks_137.vir.exe	26
PID 608 wrote to memory of 736	608	tasks_137.vir.exe	26
PID 608 wrote to memory of 736	608	tasks_137.vir.exe	26
PID 836 wrote to memory of 1796	836	ohhuzyh.exe	29
PID 836 wrote to memory of 1796	836	ohhuzyh.exe	29
PID 836 wrote to memory of 1796	836	ohhuzyh.exe	29
PID 836 wrote to memory of 1796	836	ohhuzyh.exe	29

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
836	ohhuzyh.exe
836	ohhuzyh.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\Main	ohhuzyh.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\winsec.exe	tasks_137.vir.exe
File opened for modification	C:\Windows\SysWOW64\winsec.exe	tasks_137.vir.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	ohhuzyh.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\1860988234 = "C:\\Users\\Admin\\AppData\\Roaming\\Ciygyc\\ohhuzyh.exe"	ohhuzyh.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	ohhuzyh.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\1860988234 = "C:\\Users\\Admin\\AppData\\Roaming\\Ciygyc\\ohhuzyh.exe"	ohhuzyh.exe

C:\Users\Admin\AppData\Local\Temp\tasks_137.vir.exe
"C:\Users\Admin\AppData\Local\Temp\tasks_137.vir.exe"
1⤵
- Drops file in Windows directory
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
- Drops file in System32 directory
PID:608
- C:\Users\Admin\AppData\Roaming\Ciygyc\ohhuzyh.exe
  "C:\Users\Admin\AppData\Roaming\Ciygyc\ohhuzyh.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  - Adds Run key to start application
  PID:452
- - C:\Users\Admin\AppData\Roaming\Ciygyc\ohhuzyh.exe
    "C:\Users\Admin\AppData\Roaming\Ciygyc\ohhuzyh.exe" -child
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    - Suspicious use of SetWindowsHookEx
    - Modifies Internet Explorer settings
    PID:836
  - - C:\Windows\SysWOW64\ctfmon.exe
      ctfmon.exe
      4⤵
      PID:1796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\tmp2e1390b8.bat"
  2⤵
  - Deletes itself
  PID:736

C:\Windows\SysWOW64\winsec.exe
"C:\Windows\SysWOW64\winsec.exe" -service "C:\Users\Admin\AppData\Roaming\Ciygyc\ohhuzyh.exe"
1⤵
- Executes dropped EXE
PID:1420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/836-10-0x00000000001C0000-0x00000000001C1000-memory.dmp

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memory/836-9-0x00000000001D0000-0x00000000001D0002-memory.dmp

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memory/836-7-0x00000000001C0000-0x00000000001C1000-memory.dmp

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memory/836-6-0x00000000001C0000-0x00000000001C1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads