outsteel | 434d39bfbcee378ed62a02aa40acc6507aa00b2a3cb0bf356c0b23cc9eebcd77

Analysis

max time kernel
84s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
28-02-2022 03:16

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General

Target

NewCovid-21/08042021.exe

Score

10^/10

outsteel spyware stealer

Malware Config

Signatures

OutSteel
OutSteel is a file uploader and document stealer written in AutoIT.
stealer outsteel

OutSteel batch script 1 IoCs

Detects batch script dropped by OutSteel

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\NewCovid-21\r.bat	outsteel_batch_script

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 988 created 2696 988 WerFault.exe 08042021.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

description	pid	process	target process
PID 988 created 2696	988	WerFault.exe	08042021.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

08042021.exe

description	ioc	process
File opened (read-only)	\??\x:	08042021.exe
File opened (read-only)	\??\y:	08042021.exe
File opened (read-only)	\??\h:	08042021.exe
File opened (read-only)	\??\n:	08042021.exe
File opened (read-only)	\??\q:	08042021.exe
File opened (read-only)	\??\t:	08042021.exe
File opened (read-only)	\??\w:	08042021.exe
File opened (read-only)	\??\a:	08042021.exe
File opened (read-only)	\??\b:	08042021.exe
File opened (read-only)	\??\r:	08042021.exe
File opened (read-only)	\??\v:	08042021.exe
File opened (read-only)	\??\u:	08042021.exe
File opened (read-only)	\??\g:	08042021.exe
File opened (read-only)	\??\j:	08042021.exe
File opened (read-only)	\??\k:	08042021.exe
File opened (read-only)	\??\l:	08042021.exe
File opened (read-only)	\??\o:	08042021.exe
File opened (read-only)	\??\p:	08042021.exe
File opened (read-only)	\??\s:	08042021.exe
File opened (read-only)	\??\z:	08042021.exe
File opened (read-only)	\??\e:	08042021.exe
File opened (read-only)	\??\f:	08042021.exe
File opened (read-only)	\??\i:	08042021.exe
File opened (read-only)	\??\m:	08042021.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/2696-132-0x0000000004990000-0x0000000004A6D000-memory.dmp	autoit_exe
behavioral2/memory/2696-133-0x0000000000400000-0x00000000004E2000-memory.dmp	autoit_exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2616 2696 WerFault.exe 08042021.exe

pid	pid_target	process	target process
2616	2696	WerFault.exe	08042021.exe

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

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2452 taskkill.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

2616 WerFault.exe
2616 WerFault.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exetaskkill.exe

description pid process

Token: SeRestorePrivilege 2616 WerFault.exe
Token: SeBackupPrivilege 2616 WerFault.exe
Token: SeDebugPrivilege 2452 taskkill.exe

pid	process
2452	taskkill.exe

pid	process
2616	WerFault.exe
2616	WerFault.exe

description	pid	process
Token: SeRestorePrivilege	2616	WerFault.exe
Token: SeBackupPrivilege	2616	WerFault.exe
Token: SeDebugPrivilege	2452	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

08042021.execmd.exeWerFault.execmd.exe

description	pid	process	target process
PID 2696 wrote to memory of 1636	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1636	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1636	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2932	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2932	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2932	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 648	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 648	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 648	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2184	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2184	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2184	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 788	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 788	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 788	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1880	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1880	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1880	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2264	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2264	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2264	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1392	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1392	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1392	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2140	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2140	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2140	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3268	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3268	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3268	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 988	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 988	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 988	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3276	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3276	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3276	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1428	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1428	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1428	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1816	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1816	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1816	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1304	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1304	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1304	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2152	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2152	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 2152	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1432	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1432	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 1432	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3112	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3112	2696	08042021.exe	cmd.exe
PID 2696 wrote to memory of 3112	2696	08042021.exe	cmd.exe
PID 3112 wrote to memory of 3260	3112	cmd.exe	cmd.exe
PID 3112 wrote to memory of 3260	3112	cmd.exe	cmd.exe
PID 3112 wrote to memory of 3260	3112	cmd.exe	cmd.exe
PID 988 wrote to memory of 2696	988	WerFault.exe	08042021.exe
PID 988 wrote to memory of 2696	988	WerFault.exe	08042021.exe
PID 3260 wrote to memory of 3376	3260	cmd.exe	cmd.exe
PID 3260 wrote to memory of 3376	3260	cmd.exe	cmd.exe
PID 3260 wrote to memory of 3376	3260	cmd.exe	cmd.exe
PID 3260 wrote to memory of 2452	3260	cmd.exe	taskkill.exe
PID 3260 wrote to memory of 2452	3260	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\NewCovid-21\08042021.exe
"C:\Users\Admin\AppData\Local\Temp\NewCovid-21\08042021.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:2696
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.doc" /S /B /A
  2⤵
  PID:1636
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.pdf" /S /B /A
  2⤵
  PID:2932
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.ppt" /S /B /A
  2⤵
  PID:648
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.dot" /S /B /A
  2⤵
  PID:2184
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.xl" /S /B /A
  2⤵
  PID:788
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.csv" /S /B /A
  2⤵
  PID:1880
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.rtf" /S /B /A
  2⤵
  PID:2264
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.dot" /S /B /A
  2⤵
  PID:1392
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.mdb" /S /B /A
  2⤵
  PID:2140
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.accdb" /S /B /A
  2⤵
  PID:3268
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.pot" /S /B /A
  2⤵
  PID:988
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.pps" /S /B /A
  2⤵
  PID:3276
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.ppa" /S /B /A
  2⤵
  PID:1428
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.rar" /S /B /A
  2⤵
  PID:1816
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.zip" /S /B /A
  2⤵
  PID:1304
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.tar" /S /B /A
  2⤵
  PID:2152
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /U /C DIR "\Users\Admin\*.7z" /S /B /A
  2⤵
  PID:1432
- C:\Windows\SysWOW64\cmd.exe
  cmd /c start /min r.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3112
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K r.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3260
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /min /c del "C:\Users\Admin\AppData\Local\Temp\NewCovid-21\r.bat"
      4⤵
      PID:3376
  - - C:\Windows\SysWOW64\taskkill.exe
      Taskkill /IM cmd.exe /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2696 -s 720
  2⤵
  - Program crash
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2696 -ip 2696
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\NewCovid-21\r.bat

MD5
b5ad26e1e63f33007e07116b9af012e2

SHA1
8be4a19bbd66392f3b424aa78ea3fade69ccdef8

SHA256
aa594fbd3204368ef365a67ae4bc6488e77e8d3cd80d1970bd05cd7a0e1eb1f7

SHA512
f14f213f45e87aaa01157edd65e804ec698a9ad41e04afe971474cae6204d63230c57e5d098470af6e2964e9bb3b6cee933157f8057f955b1670431fe49c3b70

Download Submit
memory/2696-130-0x0000000002EC0000-0x0000000002F3B000-memory.dmp

Filesize
492KB

Download
memory/2696-131-0x0000000002EC0000-0x0000000002F3B000-memory.dmp

Filesize
492KB

Download
memory/2696-132-0x0000000004990000-0x0000000004A6D000-memory.dmp

Filesize
884KB

Download
memory/2696-133-0x0000000000400000-0x00000000004E2000-memory.dmp

Filesize
904KB

Download