a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384

General

Target

a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Size

244KB
MD5

6735234cede7ff6555300de72308d010
SHA1

2abcd468ad6437d777e3fe4c73b1218e2dcb463a
SHA256

a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384
SHA512

8376000e4222812ac479c8e16eaf45d98cf0a85fb533244b063af38a10ec1fdad417fa4ec8aceb536add6dfc61a1517384f8c9aaf551b1c994cad41622a670e1
SSDEEP

3072:6l8eoYeYJmTmgpapjyQe3ruQ1aNmHKGJtTK7DXQoXwOjn76onm2zgLM6ClEDWcG5:defmba5Abu+7JXXGKWf/

Score

8^/10

persistence

Malware Config

Signatures

Sets file execution options in registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kesbrcscv.exe	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\kesbrcscv.exe\DisableExceptionChainValidation	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

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	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\911k1e97 = "\"C:\\ProgramData\\6b4074300\\kesbrcscv.exe\""	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Checks for any installed AV software in registry 1 TTPs 2 IoCs

Security Software Discovery

T1063

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Avira	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\avast! Antivirus	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\2	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1548	schtasks.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{A4F6DDBF-94EE-D14F-AC61-344DAA8189EF}	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{A4F6DDBF-94EE-D14F-AC61-344DAA8189EF}\2100050E	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{A4F6DDBF-94EE-D14F-AC61-344DAA8189EF}\2100050E\CG1\HAL = 05ee0000	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{A4F6DDBF-94EE-D14F-AC61-344DAA8189EF}\2100050E\CG1\BID = 2000080004000a00e607000014000000040014003700050000000000a99d3c63	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{A4F6DDBF-94EE-D14F-AC61-344DAA8189EF}\2100050E\CG1	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeRestorePrivilege	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Token: SeBackupPrivilege	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Token: SeDebugPrivilege	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
Token: SeDebugPrivilege	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 380 wrote to memory of 1548	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	83
PID 380 wrote to memory of 1548	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	83
PID 380 wrote to memory of 1548	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	83
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85
PID 380 wrote to memory of 1976	380	a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe	85

C:\Users\Admin\AppData\Local\Temp\a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe
"C:\Users\Admin\AppData\Local\Temp\a09bff557ba4252896459b44b7d24193a17b05d86d89af2a481cd56fd59ac384.exe"
1⤵
- Sets file execution options in registry
- Checks computer location settings
- Adds Run key to start application
- Checks for any installed AV software in registry
- Checks processor information in registry
- Modifies registry class
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:380
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /CREATE /SC ONLOGON /TN "Windows Update Check - 0x2100050E" /TR "C:\ProgramData\6b4074300\kesbrcscv.exe" /RL HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:1548
- C:\Windows\SysWOW64\WerFault.exe
  "C:\Windows\SysWOW64\WerFault.exe"
  2⤵
  PID:1976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

2

T1012

Security Software Discovery

1

T1063

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/380-132-0x0000000002F30000-0x0000000002F39000-memory.dmp

Filesize
36KB

Download
memory/1976-134-0x0000000073D00000-0x0000000073DD0000-memory.dmp

Filesize
832KB

Download
memory/1976-136-0x0000000073D00000-0x0000000073DD0000-memory.dmp

Filesize
832KB

Download
memory/1976-137-0x0000000073D00000-0x0000000073DD0000-memory.dmp

Filesize
832KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads