b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62

Analysis

max time kernel
158s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 09:59

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General

Target

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
Size

3.1MB
MD5

713f0e4f5d1d025eb5a2feb578520767
SHA1

34873086330b0c142a1bc56986c3a883027aba01
SHA256

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62
SHA512

087e9d556da525269bc5daf793d355951cb69e0e17728c51294d7769a72b232a9014a84c03afae6c6bbdb2e05ba211f02b3526d34e502cb06d33e65c848b7326
SSDEEP

98304:xtrbTA1GBYx/sEkmgEHiTx72blrCXDgYXY66FiN:jc1mYWEkmgECZ2blrCXDgYX68N

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "%AppData%\\Microsoft\\winlogon.exe,explorer.exe"	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Adobe Reader = "%AppData%\\Microsoft\\winlogon.exe"	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader = "%AppData%\\Microsoft\\winlogon.exe"	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

description	pid	process	target process
PID 4848 set thread context of 4788	4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe	svchost.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4328 4788 WerFault.exe svchost.exe

pid	pid_target	process	target process
4328	4788	WerFault.exe	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

pid	process
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

pid	process
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe

description	pid	process	target process
PID 4848 wrote to memory of 4788	4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe	svchost.exe
PID 4848 wrote to memory of 4788	4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe	svchost.exe
PID 4848 wrote to memory of 4788	4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe	svchost.exe
PID 4848 wrote to memory of 4788	4848	b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe
"C:\Users\Admin\AppData\Local\Temp\b5820955e9e488312bd1d6787e55aa0310adbe0108bca90a98c8678c9182ea62.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4848

C:\Windows\SysWOW64\svchost.exe
"C:\Windows\System32\svchost.exe"
2⤵
PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4788 -s 84
3⤵
- Program crash
PID:4328

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4788 -ip 4788
1⤵
PID:4748

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4788-132-0x0000000000000000-mapping.dmp

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