48d75213df96f594a6d84b0c9346338d7569ff5a9558174998dca5f2f43919af

Analysis

max time kernel
113s
max time network
104s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-04-2024 23:00

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General

Target

OFFICE2016/access.es-es/accessmui.msi
Size

2.3MB
MD5

98ef1950d6bb20c2f2295f748d955d33
SHA1

77354d86de152b784e0874378e6a0c1926c5b0b8
SHA256

cda2daa7883bf165df5b28ab39a88775f115f5eb3186d838a59284d7dca84e1e
SHA512

6aa11d19ae305f331894828db20b131ef0ad0ed2183f6444dc9a97451faef70fd5730e3d7eb14ef407dc07709e2b69e9b9fa174111c41d506275e219a4292c3c
SSDEEP

49152:JhIu+svi4ut1yFXyzEKqle+93GwtF2Vb1eksj:JhIuFvPut1WKM3Gw7Yb

Score

6^/10

Malware Config

Signatures

Enumerates connected drives 3 TTPs 46 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)	\??\Z:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe

Drops file in Windows directory 7 IoCs

Processes:

DrvInst.exemsiexec.exe

description	ioc	process
File opened for modification	C:\Windows\INF\setupapi.ev1	DrvInst.exe
File opened for modification	C:\Windows\INF\setupapi.dev.log	DrvInst.exe
File created	C:\Windows\Installer\f77d4bd.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f77d4bd.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSID654.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIDA2C.tmp	msiexec.exe
File opened for modification	C:\Windows\INF\setupapi.ev3	DrvInst.exe

Loads dropped DLL 2 IoCs

Processes:

MsiExec.exe

pid process

1248 MsiExec.exe
1248 MsiExec.exe

pid	process
1248	MsiExec.exe
1248	MsiExec.exe

Modifies data under HKEY_USERS 43 IoCs

Processes:

DrvInst.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CRLs	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\Policies\Microsoft\SystemCertificates\CA\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\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\Root	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\Microsoft\SystemCertificates\trust\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\CTLs	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\Microsoft\SystemCertificates\trust\CTLs	DrvInst.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Classes\Local Settings\MuiCache\2D\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000	DrvInst.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msiexec.exe

pid process

2596 msiexec.exe

pid	process
2596	msiexec.exe

Suspicious use of AdjustPrivilegeToken 55 IoCs

Processes:

msiexec.exemsiexec.exevssvc.exeDrvInst.exe

description	pid	process
Token: SeShutdownPrivilege	2596	msiexec.exe
Token: SeIncreaseQuotaPrivilege	2596	msiexec.exe
Token: SeRestorePrivilege	2412	msiexec.exe
Token: SeTakeOwnershipPrivilege	2412	msiexec.exe
Token: SeSecurityPrivilege	2412	msiexec.exe
Token: SeCreateTokenPrivilege	2596	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	2596	msiexec.exe
Token: SeLockMemoryPrivilege	2596	msiexec.exe
Token: SeIncreaseQuotaPrivilege	2596	msiexec.exe
Token: SeMachineAccountPrivilege	2596	msiexec.exe
Token: SeTcbPrivilege	2596	msiexec.exe
Token: SeSecurityPrivilege	2596	msiexec.exe
Token: SeTakeOwnershipPrivilege	2596	msiexec.exe
Token: SeLoadDriverPrivilege	2596	msiexec.exe
Token: SeSystemProfilePrivilege	2596	msiexec.exe
Token: SeSystemtimePrivilege	2596	msiexec.exe
Token: SeProfSingleProcessPrivilege	2596	msiexec.exe
Token: SeIncBasePriorityPrivilege	2596	msiexec.exe
Token: SeCreatePagefilePrivilege	2596	msiexec.exe
Token: SeCreatePermanentPrivilege	2596	msiexec.exe
Token: SeBackupPrivilege	2596	msiexec.exe
Token: SeRestorePrivilege	2596	msiexec.exe
Token: SeShutdownPrivilege	2596	msiexec.exe
Token: SeDebugPrivilege	2596	msiexec.exe
Token: SeAuditPrivilege	2596	msiexec.exe
Token: SeSystemEnvironmentPrivilege	2596	msiexec.exe
Token: SeChangeNotifyPrivilege	2596	msiexec.exe
Token: SeRemoteShutdownPrivilege	2596	msiexec.exe
Token: SeUndockPrivilege	2596	msiexec.exe
Token: SeSyncAgentPrivilege	2596	msiexec.exe
Token: SeEnableDelegationPrivilege	2596	msiexec.exe
Token: SeManageVolumePrivilege	2596	msiexec.exe
Token: SeImpersonatePrivilege	2596	msiexec.exe
Token: SeCreateGlobalPrivilege	2596	msiexec.exe
Token: SeBackupPrivilege	2384	vssvc.exe
Token: SeRestorePrivilege	2384	vssvc.exe
Token: SeAuditPrivilege	2384	vssvc.exe
Token: SeBackupPrivilege	2412	msiexec.exe
Token: SeRestorePrivilege	2412	msiexec.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2632	DrvInst.exe
Token: SeLoadDriverPrivilege	2632	DrvInst.exe
Token: SeLoadDriverPrivilege	2632	DrvInst.exe
Token: SeLoadDriverPrivilege	2632	DrvInst.exe
Token: SeRestorePrivilege	2412	msiexec.exe
Token: SeTakeOwnershipPrivilege	2412	msiexec.exe
Token: SeRestorePrivilege	2412	msiexec.exe
Token: SeTakeOwnershipPrivilege	2412	msiexec.exe
Token: SeRestorePrivilege	2412	msiexec.exe
Token: SeTakeOwnershipPrivilege	2412	msiexec.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

msiexec.exe

pid process

2596 msiexec.exe

pid	process
2596	msiexec.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

msiexec.exe

description	pid	process	target process
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe
PID 2412 wrote to memory of 1248	2412	msiexec.exe	MsiExec.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\msiexec.exe
msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\OFFICE2016\access.es-es\accessmui.msi
1⤵
- Enumerates connected drives
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2596

C:\Windows\system32\msiexec.exe
C:\Windows\system32\msiexec.exe /V
1⤵
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2412

C:\Windows\syswow64\MsiExec.exe
C:\Windows\syswow64\MsiExec.exe -Embedding F347DC5EAAF1854D814918D0994274B2
2⤵
- Loads dropped DLL
PID:1248

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2384

C:\Windows\system32\DrvInst.exe
DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000004C4" "0000000000000060"
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:2632

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
344B

MD5
774854bd7eb1c548aa517e7f9175941c

SHA1
d6a79c4a1470a4703325ade8f4004a9c858a26bd

SHA256
238bf80f9469f0c9406e2b58828348f70cf5d2ce40f0517ca863e8660148600c

SHA512
278f53d21debf7ffd1169ea75615037a10137e801a8da9b631b83f8c5a9eef6e77c245adc3606054d96543a9a7f7a7445083109b739443e31bab0f0a7c1a04af

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C:\Users\Admin\AppData\Local\Temp\CabD5A7.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

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C:\Windows\Installer\MSID654.tmp
Filesize
95KB

MD5
acfd123d0e36411b9c1f556853dd9ea5

SHA1
812025408e21687dcd6e8eeb1667025a7b7abcbf

SHA256
d89dd83af50bfc6e325e2b4e7eecd982ec3ddee9ccb9cfef86d8a5593907c317

SHA512
e01da6d2867ca5a029d60bac781cef6639485255ce515bc8e094a43fa107b0d8c120b7bb3de75457407479de71585dfd9475b1b1f39d2d82d303586ccdb9024d

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads