bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337

General

Target

bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
Size

661KB
MD5

689481e740f42ffb4feba17baabddf60
SHA1

f2dbbbef245ac76d7c337aa6f84a4816a7952391
SHA256

bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337
SHA512

eed17db502ca8bcde074c71cd69f37372df41e194175636ee16a3c4d278eeb849711c5a5f079ab150fe7ef1b85810b674bc4dd5924ccf3cdfe8fd765e746344c
SSDEEP

6144:eVY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bco2KWF:egDhdkq5BCoC5LfWSLTUQpr2Zu19Q3

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe scvhosti.exe"	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

Disables Task Manager via registry modification
evasion

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3440-132-0x0000000000400000-0x00000000004A7000-memory.dmp	upx
behavioral2/memory/3440-137-0x0000000000400000-0x00000000004A7000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yahoo Messengger = "C:\\Windows\\system32\\scvhosti.exe"	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/3440-132-0x0000000000400000-0x00000000004A7000-memory.dmp	autoit_exe
behavioral2/memory/3440-137-0x0000000000400000-0x00000000004A7000-memory.dmp	autoit_exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\anhui.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File opened for modification	C:\Windows\SysWOW64\autorun.ini	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File created	C:\Windows\SysWOW64\setting.ini	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File opened for modification	C:\Windows\SysWOW64\setting.ini	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File created	C:\Windows\SysWOW64\scvhosti.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File opened for modification	C:\Windows\SysWOW64\scvhosti.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File created	C:\Windows\SysWOW64\anhui.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\scvhosti.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
File opened for modification	C:\Windows\scvhosti.exe	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 3436	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	83
PID 3440 wrote to memory of 3436	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	83
PID 3440 wrote to memory of 3436	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	83
PID 3436 wrote to memory of 5112	3436	cmd.exe	85
PID 3436 wrote to memory of 5112	3436	cmd.exe	85
PID 3436 wrote to memory of 5112	3436	cmd.exe	85
PID 3440 wrote to memory of 532	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	86
PID 3440 wrote to memory of 532	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	86
PID 3440 wrote to memory of 532	3440	bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe	86
PID 532 wrote to memory of 3968	532	cmd.exe	88
PID 532 wrote to memory of 3968	532	cmd.exe	88
PID 532 wrote to memory of 3968	532	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
"C:\Users\Admin\AppData\Local\Temp\bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe"
1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT /delete /yes
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3436
- - C:\Windows\SysWOW64\at.exe
    AT /delete /yes
    3⤵
    PID:5112
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\anhui.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\Windows\SysWOW64\at.exe
    AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\anhui.exe
    3⤵
    PID:3968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3440-132-0x0000000000400000-0x00000000004A7000-memory.dmp

Filesize
668KB

Download
memory/3440-137-0x0000000000400000-0x00000000004A7000-memory.dmp

Filesize
668KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads