827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9

General

Target

827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
Size

800KB
MD5

0805d96eb2c3d5122f32d5a822344b00
SHA1

dfdc48badbaf9308b4f39883142e124b419e980a
SHA256

827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9
SHA512

65a6a1a328f31ffb30a23b7e5c904c167b681bd42cb3cffce6b827095984eac57e61c5106f0b601844a5f5dd4d6aea0b0242ca74cb7f2814d9e70e0de8e51076
SSDEEP

6144:PTBcx19YgC8Ukq9NXcHNINzsr5IW4Fxpr7dTHbmdUnmXr3w798r4:PTB09SkkNXKgor5IWk3rkegrO

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 rundll.exe"	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.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"	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe

Disables Task Manager via registry modification
evasion

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/768-132-0x0000000000400000-0x0000000000535000-memory.dmp	upx
behavioral2/memory/768-133-0x0000000000400000-0x0000000000535000-memory.dmp	upx
behavioral2/memory/768-135-0x0000000000400000-0x0000000000535000-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	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yahoo Messengger = "C:\\Windows\\system32\\regsvr.exe"	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe

Modifies WinLogon 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\system = "Winhelp.exe"	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/768-135-0x0000000000400000-0x0000000000535000-memory.dmp	autoit_exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\regsvr.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File opened for modification	C:\Windows\SysWOW64\regsvr.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File created	C:\Windows\SysWOW64\winhelp.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File opened for modification	C:\Windows\SysWOW64\winhelp.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File opened for modification	C:\Windows\SysWOW64\setup.ini	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\winhelp.ini	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File created	C:\Windows\regsvr.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File opened for modification	C:\Windows\regsvr.exe	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
File created	C:\Windows\winhelp.ini	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 768 wrote to memory of 5084	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	81
PID 768 wrote to memory of 5084	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	81
PID 768 wrote to memory of 5084	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	81
PID 5084 wrote to memory of 4896	5084	cmd.exe	84
PID 5084 wrote to memory of 4896	5084	cmd.exe	84
PID 5084 wrote to memory of 4896	5084	cmd.exe	84
PID 768 wrote to memory of 2416	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	85
PID 768 wrote to memory of 2416	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	85
PID 768 wrote to memory of 2416	768	827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe	85
PID 2416 wrote to memory of 4076	2416	cmd.exe	87
PID 2416 wrote to memory of 4076	2416	cmd.exe	87
PID 2416 wrote to memory of 4076	2416	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe
"C:\Users\Admin\AppData\Local\Temp\827563c552eabaf7a926e0ee854db8fbf854dc91c2094e1a0d24d87ea57255b9.exe"
1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:768
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT /delete /yes
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SysWOW64\at.exe
    AT /delete /yes
    3⤵
    PID:4896
- 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\winhelp.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Windows\SysWOW64\at.exe
    AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\winhelp.exe
    3⤵
    PID:4076

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/768-132-0x0000000000400000-0x0000000000535000-memory.dmp

Filesize
1.2MB

Download
memory/768-133-0x0000000000400000-0x0000000000535000-memory.dmp

Filesize
1.2MB

Download
memory/768-135-0x0000000000400000-0x0000000000535000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads