1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee

General

Target

1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Size

185KB
MD5

e9d06e56d4ee9bf7f5ca6c35a473d632
SHA1

1b144cc1988d902243e030ade48bff63e538ff91
SHA256

1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee
SHA512

78dad1c9621562b093b22e1c016e20a75c2c7480bd444f504edccf87192a7330fd9473d532ed744f7b6f0ff020b0be7d142a4fbe3517022e212f43dbccdd066d
SSDEEP

3072:IDQkrZoosbIfXJsWWZQOoz6kOa2bz2Ti1APXZ0PCeDOxaF7YHUVn94zIXVy:IDpoe6zozCac712XZ0PCeS47YHk94MXs

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\bigfpyefz.exe	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\bigfpyefz.exe\DisableExceptionChainValidation	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.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	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Loads dropped DLL 1 IoCs

pid	Process
4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.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	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\avast! Antivirus	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File created	C:\ProgramData\randomfolder\desktop.ini	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4900 set thread context of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79

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

pid	pid_target	Process	procid_target
2100	4540	WerFault.exe	82

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\2	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.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
4780	schtasks.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{7343BAF9-0890-754E-8C3A-8EC9A345FE79}\63AC0846\CG1	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{7343BAF9-0890-754E-8C3A-8EC9A345FE79}	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{7343BAF9-0890-754E-8C3A-8EC9A345FE79}\63AC0846	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{7343BAF9-0890-754E-8C3A-8EC9A345FE79}\63AC0846\CG1\HAL = 05ee0000	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\CLSID\{7343BAF9-0890-754E-8C3A-8EC9A345FE79}\63AC0846\CG1\BID = 200008001c000b00e6070000140000001c00040032002a0000000000223e8463	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Token: SeBackupPrivilege	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
Token: SeDebugPrivilege	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 4900 wrote to memory of 716	4900	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	79
PID 716 wrote to memory of 4780	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	80
PID 716 wrote to memory of 4780	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	80
PID 716 wrote to memory of 4780	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	80
PID 716 wrote to memory of 4540	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	82
PID 716 wrote to memory of 4540	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	82
PID 716 wrote to memory of 4540	716	1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe	82

C:\Users\Admin\AppData\Local\Temp\1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
"C:\Users\Admin\AppData\Local\Temp\1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Users\Admin\AppData\Local\Temp\1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe
  "C:\Users\Admin\AppData\Local\Temp\1ef3f59a753e5e6add79ca2c5b2d1bc71de97f7e0a6a158d39d4f7d05a99ceee.exe"
  2⤵
  - Sets file execution options in registry
  - Checks computer location settings
  - Checks for any installed AV software in registry
  - Drops desktop.ini file(s)
  - Checks processor information in registry
  - Modifies registry class
  - Suspicious behavior: MapViewOfSection
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:716
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /CREATE /SC ONLOGON /TN "Windows Update Check - 0x63AC0846" /TR "C:\ProgramData\randomfolder\bigfpyefz.exe" /RL HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:4780
- - C:\Windows\SysWOW64\svchost.exe
    -k NetworkService
    3⤵
    PID:4540
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4540 -s 96
      4⤵
      Program crash
      PID:2100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4540 -ip 4540
1⤵
PID:4884

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

1

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nss1BE6.tmp\criollo.dll

Filesize
19KB

MD5
ee8a4d32b8d3816b48d71b82c86e9966

SHA1
b0a3b44bfe069e8a0adca556b989abae5a200519

SHA256
b0c4a65678e38c292ca84ecaa05b0f40711254978ae377092e7fcc2b588b7092

SHA512
b471aab4b05c6e91ccd84f906f9203b2683218668a3b41ce58a57948020dea03c3ae1281a17d956419bef0fe3931b274618d069d5503b8aa40fa24a24665f3f0

Download Submit
memory/716-134-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/716-136-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/716-138-0x0000000000500000-0x000000000054B000-memory.dmp

Filesize
300KB

Download
memory/716-139-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/716-140-0x0000000000500000-0x000000000054B000-memory.dmp

Filesize
300KB

Download
memory/716-141-0x0000000000660000-0x000000000066B000-memory.dmp

Filesize
44KB

Download
memory/716-143-0x0000000000500000-0x000000000054B000-memory.dmp

Filesize
300KB

Download
memory/4540-145-0x0000000076EA0000-0x0000000077043000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads