guloader | 058ee0434baf472713da384ee3ba273f64995b9c7f83b7e62a8b3285b334b2cf

General

Target

t1.msi
Size

124KB
MD5

5262da4295e8a62d58d17991b35bf860
SHA1

3fba37528f6b06d2c89c7d86ce6352df438f1855
SHA256

058ee0434baf472713da384ee3ba273f64995b9c7f83b7e62a8b3285b334b2cf
SHA512

8a82d10997e8b64ab12688e6cb909e405644bfcf2ed0e47df9c16009bf1ae415c17bc5a0cc27717d34f6f5484ca27fe026893b4637ea01cb1209dd0427574c18

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Executes dropped EXE 1 IoCs

Processes:

MSI8D82.tmp

pid process

864 MSI8D82.tmp

pid	process
864	MSI8D82.tmp

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

MSI8D82.tmpMSI8D82.tmp

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	MSI8D82.tmp
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	MSI8D82.tmp

Loads dropped DLL 1 IoCs

Processes:

MSI8D82.tmp

pid process

1764 MSI8D82.tmp

pid	process
1764	MSI8D82.tmp

Enumerates connected drives 3 TTPs 48 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:

msiexec.exemsiexec.exe

description	ioc	process
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

MSI8D82.tmpMSI8D82.tmp

pid process

864 MSI8D82.tmp
1764 MSI8D82.tmp
Suspicious use of SetThreadContext 1 IoCs

Processes:

MSI8D82.tmp

description pid process target process

PID 864 set thread context of 1764 864 MSI8D82.tmp MSI8D82.tmp

pid	process
864	MSI8D82.tmp
1764	MSI8D82.tmp

description	pid	process	target process
PID 864 set thread context of 1764	864	MSI8D82.tmp	MSI8D82.tmp

Drops file in Windows directory 10 IoCs

Processes:

msiexec.exeDrvInst.exe

description	ioc	process
File created	C:\Windows\Installer\f768a95.ipi	msiexec.exe
File opened for modification	C:\Windows\Installer\	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI8D13.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI8D82.tmp	msiexec.exe
File opened for modification	C:\Windows\INF\setupapi.ev3	DrvInst.exe
File opened for modification	C:\Windows\INF\setupapi.dev.log	DrvInst.exe
File created	C:\Windows\Installer\f768a93.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f768a93.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f768a95.ipi	msiexec.exe
File opened for modification	C:\Windows\INF\setupapi.ev1	DrvInst.exe

Modifies data under HKEY_USERS 43 IoCs

Processes:

DrvInst.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\My	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	DrvInst.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\25\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	DrvInst.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

msiexec.exe

pid process

584 msiexec.exe
584 msiexec.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

MSI8D82.tmp

pid process

864 MSI8D82.tmp

pid	process
584	msiexec.exe
584	msiexec.exe

pid	process
864	MSI8D82.tmp

Suspicious use of AdjustPrivilegeToken 61 IoCs

Processes:

msiexec.exemsiexec.exevssvc.exeDrvInst.exe

description	pid	process
Token: SeShutdownPrivilege	1508	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1508	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeSecurityPrivilege	584	msiexec.exe
Token: SeCreateTokenPrivilege	1508	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1508	msiexec.exe
Token: SeLockMemoryPrivilege	1508	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1508	msiexec.exe
Token: SeMachineAccountPrivilege	1508	msiexec.exe
Token: SeTcbPrivilege	1508	msiexec.exe
Token: SeSecurityPrivilege	1508	msiexec.exe
Token: SeTakeOwnershipPrivilege	1508	msiexec.exe
Token: SeLoadDriverPrivilege	1508	msiexec.exe
Token: SeSystemProfilePrivilege	1508	msiexec.exe
Token: SeSystemtimePrivilege	1508	msiexec.exe
Token: SeProfSingleProcessPrivilege	1508	msiexec.exe
Token: SeIncBasePriorityPrivilege	1508	msiexec.exe
Token: SeCreatePagefilePrivilege	1508	msiexec.exe
Token: SeCreatePermanentPrivilege	1508	msiexec.exe
Token: SeBackupPrivilege	1508	msiexec.exe
Token: SeRestorePrivilege	1508	msiexec.exe
Token: SeShutdownPrivilege	1508	msiexec.exe
Token: SeDebugPrivilege	1508	msiexec.exe
Token: SeAuditPrivilege	1508	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1508	msiexec.exe
Token: SeChangeNotifyPrivilege	1508	msiexec.exe
Token: SeRemoteShutdownPrivilege	1508	msiexec.exe
Token: SeUndockPrivilege	1508	msiexec.exe
Token: SeSyncAgentPrivilege	1508	msiexec.exe
Token: SeEnableDelegationPrivilege	1508	msiexec.exe
Token: SeManageVolumePrivilege	1508	msiexec.exe
Token: SeImpersonatePrivilege	1508	msiexec.exe
Token: SeCreateGlobalPrivilege	1508	msiexec.exe
Token: SeBackupPrivilege	1288	vssvc.exe
Token: SeRestorePrivilege	1288	vssvc.exe
Token: SeAuditPrivilege	1288	vssvc.exe
Token: SeBackupPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	1672	DrvInst.exe
Token: SeLoadDriverPrivilege	1672	DrvInst.exe
Token: SeLoadDriverPrivilege	1672	DrvInst.exe
Token: SeLoadDriverPrivilege	1672	DrvInst.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe
Token: SeRestorePrivilege	584	msiexec.exe
Token: SeTakeOwnershipPrivilege	584	msiexec.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

msiexec.exe

pid process

1508 msiexec.exe
1508 msiexec.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSI8D82.tmp

pid process

864 MSI8D82.tmp

pid	process
1508	msiexec.exe
1508	msiexec.exe

pid	process
864	MSI8D82.tmp

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

msiexec.exeMSI8D82.tmp

description	pid	process	target process
PID 584 wrote to memory of 864	584	msiexec.exe	MSI8D82.tmp
PID 584 wrote to memory of 864	584	msiexec.exe	MSI8D82.tmp
PID 584 wrote to memory of 864	584	msiexec.exe	MSI8D82.tmp
PID 584 wrote to memory of 864	584	msiexec.exe	MSI8D82.tmp
PID 864 wrote to memory of 1764	864	MSI8D82.tmp	MSI8D82.tmp
PID 864 wrote to memory of 1764	864	MSI8D82.tmp	MSI8D82.tmp
PID 864 wrote to memory of 1764	864	MSI8D82.tmp	MSI8D82.tmp
PID 864 wrote to memory of 1764	864	MSI8D82.tmp	MSI8D82.tmp
PID 864 wrote to memory of 1764	864	MSI8D82.tmp	MSI8D82.tmp

C:\Windows\system32\msiexec.exe
msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\t1.msi
1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1508

C:\Windows\system32\msiexec.exe
C:\Windows\system32\msiexec.exe /V
1⤵
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:584
- C:\Windows\Installer\MSI8D82.tmp
  "C:\Windows\Installer\MSI8D82.tmp"
  2⤵
  - Executes dropped EXE
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:864
- - C:\Windows\Installer\MSI8D82.tmp
    "C:\Windows\Installer\MSI8D82.tmp"
    3⤵
    - Checks QEMU agent file
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    PID:1764

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1288

C:\Windows\system32\DrvInst.exe
DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot13" "" "" "66d15495b" "0000000000000000" "00000000000003A4" "00000000000003D0"
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Installer\MSI8D82.tmp

MD5
8c0ef68bfe8b4f2d72ca3599aedb6387

SHA1
b6c02d95c26e2ec62ba27d0e4c3cd3b1e7f25261

SHA256
4b2a32c7afbfb44a85d88bfd4f0a79306278d880c64a28bf3242dc686665c8fe

SHA512
87bf4a30a191e4e7ccc4c17122868a7355d20d4666c954d0229c47bd253077565ee151b33d3a3fff439d56cf0e6360d923055ec7a4993f797a8446a86d29d733

Download Submit
C:\Windows\Installer\MSI8D82.tmp

MD5
8c0ef68bfe8b4f2d72ca3599aedb6387

SHA1
b6c02d95c26e2ec62ba27d0e4c3cd3b1e7f25261

SHA256
4b2a32c7afbfb44a85d88bfd4f0a79306278d880c64a28bf3242dc686665c8fe

SHA512
87bf4a30a191e4e7ccc4c17122868a7355d20d4666c954d0229c47bd253077565ee151b33d3a3fff439d56cf0e6360d923055ec7a4993f797a8446a86d29d733

Download Submit
C:\Windows\Installer\MSI8D82.tmp

MD5
8c0ef68bfe8b4f2d72ca3599aedb6387

SHA1
b6c02d95c26e2ec62ba27d0e4c3cd3b1e7f25261

SHA256
4b2a32c7afbfb44a85d88bfd4f0a79306278d880c64a28bf3242dc686665c8fe

SHA512
87bf4a30a191e4e7ccc4c17122868a7355d20d4666c954d0229c47bd253077565ee151b33d3a3fff439d56cf0e6360d923055ec7a4993f797a8446a86d29d733

Download Submit
memory/864-63-0x0000000077CB0000-0x0000000077E30000-memory.dmp

Filesize
1.5MB

Download
memory/864-70-0x0000000077CB0000-0x0000000077E30000-memory.dmp

Filesize
1.5MB

Download
memory/864-59-0x0000000000240000-0x0000000000251000-memory.dmp

Filesize
68KB

Download
memory/864-61-0x0000000076B61000-0x0000000076B63000-memory.dmp

Filesize
8KB

Download
memory/864-62-0x0000000077AD0000-0x0000000077C79000-memory.dmp

Filesize
1.7MB

Download
memory/864-57-0x0000000000220000-0x0000000000226000-memory.dmp

Filesize
24KB

Download
memory/864-58-0x0000000000220000-0x000000000022A000-memory.dmp

Filesize
40KB

Download
memory/864-55-0x0000000000000000-mapping.dmp

Download
memory/1508-53-0x000007FEFC4F1000-0x000007FEFC4F3000-memory.dmp

Filesize
8KB

Download
memory/1764-68-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/1764-71-0x00000000001B0000-0x00000000002B0000-memory.dmp

Filesize
1024KB

Download
memory/1764-66-0x0000000000401230-mapping.dmp

Download
memory/1764-73-0x0000000077AD0000-0x0000000077C79000-memory.dmp

Filesize
1.7MB

Download
memory/1764-74-0x0000000077CB0000-0x0000000077E30000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads