48d75213df96f594a6d84b0c9346338d7569ff5a9558174998dca5f2f43919af

Analysis

max time kernel
120s
max time network
139s
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/dcf.es-es/dcfmui.msi
Size

2.3MB
MD5

a0543b894c018380cc5e868f3f168069
SHA1

583ec7da66ba57ba1fb4415380259614117e74ae
SHA256

42de4102487e0ca49c4968f1109ba98abb970600eda32ac0eb11e489bd9fb8d0
SHA512

c51e9ff337a37a593dbc91a34de66d16a045862f0d735c8dea65fb8885ce9f21bb55940643315a357a56de5db4a2de41571d44fef073b7cd93bd715ea32bc932
SSDEEP

49152:IhIu+svi4ut1yFXyzEKqle+93GwtF2VbIPk9u:IhIuFvPut1WKM3Gw7Yb

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

Drops file in Windows directory 7 IoCs

Processes:

DrvInst.exemsiexec.exe

description	ioc	process
File opened for modification	C:\Windows\INF\setupapi.dev.log	DrvInst.exe
File created	C:\Windows\Installer\f76848b.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f76848b.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI8519.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI8672.tmp	msiexec.exe
File opened for modification	C:\Windows\INF\setupapi.ev3	DrvInst.exe
File opened for modification	C:\Windows\INF\setupapi.ev1	DrvInst.exe

Loads dropped DLL 2 IoCs

Processes:

MsiExec.exe

pid process

2112 MsiExec.exe
2112 MsiExec.exe

pid	process
2112	MsiExec.exe
2112	MsiExec.exe

Modifies data under HKEY_USERS 43 IoCs

Processes:

DrvInst.exe

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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msiexec.exe

pid process

1040 msiexec.exe

pid	process
1040	msiexec.exe

Suspicious use of AdjustPrivilegeToken 55 IoCs

Processes:

msiexec.exemsiexec.exevssvc.exeDrvInst.exe

description	pid	process
Token: SeShutdownPrivilege	1040	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1040	msiexec.exe
Token: SeRestorePrivilege	2472	msiexec.exe
Token: SeTakeOwnershipPrivilege	2472	msiexec.exe
Token: SeSecurityPrivilege	2472	msiexec.exe
Token: SeCreateTokenPrivilege	1040	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1040	msiexec.exe
Token: SeLockMemoryPrivilege	1040	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1040	msiexec.exe
Token: SeMachineAccountPrivilege	1040	msiexec.exe
Token: SeTcbPrivilege	1040	msiexec.exe
Token: SeSecurityPrivilege	1040	msiexec.exe
Token: SeTakeOwnershipPrivilege	1040	msiexec.exe
Token: SeLoadDriverPrivilege	1040	msiexec.exe
Token: SeSystemProfilePrivilege	1040	msiexec.exe
Token: SeSystemtimePrivilege	1040	msiexec.exe
Token: SeProfSingleProcessPrivilege	1040	msiexec.exe
Token: SeIncBasePriorityPrivilege	1040	msiexec.exe
Token: SeCreatePagefilePrivilege	1040	msiexec.exe
Token: SeCreatePermanentPrivilege	1040	msiexec.exe
Token: SeBackupPrivilege	1040	msiexec.exe
Token: SeRestorePrivilege	1040	msiexec.exe
Token: SeShutdownPrivilege	1040	msiexec.exe
Token: SeDebugPrivilege	1040	msiexec.exe
Token: SeAuditPrivilege	1040	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1040	msiexec.exe
Token: SeChangeNotifyPrivilege	1040	msiexec.exe
Token: SeRemoteShutdownPrivilege	1040	msiexec.exe
Token: SeUndockPrivilege	1040	msiexec.exe
Token: SeSyncAgentPrivilege	1040	msiexec.exe
Token: SeEnableDelegationPrivilege	1040	msiexec.exe
Token: SeManageVolumePrivilege	1040	msiexec.exe
Token: SeImpersonatePrivilege	1040	msiexec.exe
Token: SeCreateGlobalPrivilege	1040	msiexec.exe
Token: SeBackupPrivilege	2524	vssvc.exe
Token: SeRestorePrivilege	2524	vssvc.exe
Token: SeAuditPrivilege	2524	vssvc.exe
Token: SeBackupPrivilege	2472	msiexec.exe
Token: SeRestorePrivilege	2472	msiexec.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	1692	DrvInst.exe
Token: SeLoadDriverPrivilege	1692	DrvInst.exe
Token: SeLoadDriverPrivilege	1692	DrvInst.exe
Token: SeLoadDriverPrivilege	1692	DrvInst.exe
Token: SeRestorePrivilege	2472	msiexec.exe
Token: SeTakeOwnershipPrivilege	2472	msiexec.exe
Token: SeRestorePrivilege	2472	msiexec.exe
Token: SeTakeOwnershipPrivilege	2472	msiexec.exe
Token: SeRestorePrivilege	2472	msiexec.exe
Token: SeTakeOwnershipPrivilege	2472	msiexec.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

msiexec.exe

pid process

1040 msiexec.exe

pid	process
1040	msiexec.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

msiexec.exe

description	pid	process	target process
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	msiexec.exe	MsiExec.exe
PID 2472 wrote to memory of 2112	2472	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\dcf.es-es\dcfmui.msi
1⤵
- Enumerates connected drives
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1040

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:2472

C:\Windows\syswow64\MsiExec.exe
C:\Windows\syswow64\MsiExec.exe -Embedding 89A88581F8157DDB324E96B20373A027
2⤵
- Loads dropped DLL
PID:2112

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2524

C:\Windows\system32\DrvInst.exe
DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000003FC" "0000000000000588"
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1692

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
3342887d7ebc310b185d1290eba7d366

SHA1
5ec1880a20428bf653465e7d62ed9b2b3dec90de

SHA256
b6409eab33d2f87a7c15d7ea609ab1cf55316cef2880addef245ccc6a4bdc3c7

SHA512
9e8ffdf81c020d01e2c098dde08754cb55aeab8d13397486abe43a39ac0dfd42015fe9f358614dd1f5c2d533d24b42d71eca3d39c14c9968b7f05b361e0e38c2

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C:\Users\Admin\AppData\Local\Temp\Cab84C9.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

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C:\Windows\Installer\MSI8519.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