48d75213df96f594a6d84b0c9346338d7569ff5a9558174998dca5f2f43919af

Analysis

max time kernel
100s
max time network
62s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
23-04-2024 23:00

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General

Target

OFFICE2016/excel.es-es/excelmui.msi
Size

2.3MB
MD5

7929ced90a0ae0bc555008de48126723
SHA1

364d7b13c9e61221e6f8e427329656d85790d10c
SHA256

1fb86adb56d0b0a13dc974f82673ffdea4021c9c2210bfd97d9aa87b873d84b8
SHA512

808cb914c3d826f379ab59c7aa787dc088e4246e84885b0edb73967fe21ea283b87f7baeabed00a63eba8b25ce72b678c0137cc5c1eeb31edd1f6cad58acccbb
SSDEEP

49152:fhIu+svi4ut1yFXyzEKqle+93GwtF2Vb+kbo:fhIuFvPut1WKM3Gw7Yb

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

Drops file in Windows directory 7 IoCs

Processes:

msiexec.exeDrvInst.exe

description	ioc	process
File created	C:\Windows\Installer\f7698b7.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f7698b7.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI9926.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI99F2.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
File opened for modification	C:\Windows\INF\setupapi.dev.log	DrvInst.exe

Loads dropped DLL 2 IoCs

Processes:

MsiExec.exe

pid process

2764 MsiExec.exe
2764 MsiExec.exe

pid	process
2764	MsiExec.exe
2764	MsiExec.exe

Modifies data under HKEY_USERS 43 IoCs

Processes:

DrvInst.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\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\CA\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\Certificates	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\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\Disallowed	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\My	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\Certificates	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	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\CRLs	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\CA\CTLs	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\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	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\SystemCertificates\Disallowed\Certificates	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CTLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CRLs	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	DrvInst.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CRLs	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\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\trust\CRLs	DrvInst.exe

Suspicious use of AdjustPrivilegeToken 55 IoCs

Processes:

msiexec.exemsiexec.exevssvc.exeDrvInst.exe

description	pid	process
Token: SeShutdownPrivilege	2860	msiexec.exe
Token: SeIncreaseQuotaPrivilege	2860	msiexec.exe
Token: SeRestorePrivilege	2612	msiexec.exe
Token: SeTakeOwnershipPrivilege	2612	msiexec.exe
Token: SeSecurityPrivilege	2612	msiexec.exe
Token: SeCreateTokenPrivilege	2860	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	2860	msiexec.exe
Token: SeLockMemoryPrivilege	2860	msiexec.exe
Token: SeIncreaseQuotaPrivilege	2860	msiexec.exe
Token: SeMachineAccountPrivilege	2860	msiexec.exe
Token: SeTcbPrivilege	2860	msiexec.exe
Token: SeSecurityPrivilege	2860	msiexec.exe
Token: SeTakeOwnershipPrivilege	2860	msiexec.exe
Token: SeLoadDriverPrivilege	2860	msiexec.exe
Token: SeSystemProfilePrivilege	2860	msiexec.exe
Token: SeSystemtimePrivilege	2860	msiexec.exe
Token: SeProfSingleProcessPrivilege	2860	msiexec.exe
Token: SeIncBasePriorityPrivilege	2860	msiexec.exe
Token: SeCreatePagefilePrivilege	2860	msiexec.exe
Token: SeCreatePermanentPrivilege	2860	msiexec.exe
Token: SeBackupPrivilege	2860	msiexec.exe
Token: SeRestorePrivilege	2860	msiexec.exe
Token: SeShutdownPrivilege	2860	msiexec.exe
Token: SeDebugPrivilege	2860	msiexec.exe
Token: SeAuditPrivilege	2860	msiexec.exe
Token: SeSystemEnvironmentPrivilege	2860	msiexec.exe
Token: SeChangeNotifyPrivilege	2860	msiexec.exe
Token: SeRemoteShutdownPrivilege	2860	msiexec.exe
Token: SeUndockPrivilege	2860	msiexec.exe
Token: SeSyncAgentPrivilege	2860	msiexec.exe
Token: SeEnableDelegationPrivilege	2860	msiexec.exe
Token: SeManageVolumePrivilege	2860	msiexec.exe
Token: SeImpersonatePrivilege	2860	msiexec.exe
Token: SeCreateGlobalPrivilege	2860	msiexec.exe
Token: SeBackupPrivilege	2576	vssvc.exe
Token: SeRestorePrivilege	2576	vssvc.exe
Token: SeAuditPrivilege	2576	vssvc.exe
Token: SeBackupPrivilege	2612	msiexec.exe
Token: SeRestorePrivilege	2612	msiexec.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2544	DrvInst.exe
Token: SeLoadDriverPrivilege	2544	DrvInst.exe
Token: SeLoadDriverPrivilege	2544	DrvInst.exe
Token: SeLoadDriverPrivilege	2544	DrvInst.exe
Token: SeRestorePrivilege	2612	msiexec.exe
Token: SeTakeOwnershipPrivilege	2612	msiexec.exe
Token: SeRestorePrivilege	2612	msiexec.exe
Token: SeTakeOwnershipPrivilege	2612	msiexec.exe
Token: SeRestorePrivilege	2612	msiexec.exe
Token: SeTakeOwnershipPrivilege	2612	msiexec.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

msiexec.exe

pid process

2860 msiexec.exe
2860 msiexec.exe

pid	process
2860	msiexec.exe
2860	msiexec.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

msiexec.exe

description	pid	process	target process
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	msiexec.exe	MsiExec.exe
PID 2612 wrote to memory of 2764	2612	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\excel.es-es\excelmui.msi
1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2860

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:2612
- C:\Windows\syswow64\MsiExec.exe
  C:\Windows\syswow64\MsiExec.exe -Embedding 9953470EA4520371DCDBDEDD51BBDFE9
  2⤵
  - Loads dropped DLL
  PID:2764

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2576

C:\Windows\system32\DrvInst.exe
DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000002C4" "0000000000000558"
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:2544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
344B

MD5
f8eaf2cd8dfabf19832b4719964520de

SHA1
82eac4fd38632d268d415f09df64c7b9b88a270f

SHA256
2a1c6cad4abe995e3ebec291ae5a77aa41f7c24e66e0a509b47c3b67ec7254e2

SHA512
907a7cf5694f37af080dc834f6dc1dd8f744c37589c360a4f076ad7afd81f130725d5ddcd5f5d4b9af54191241ce97a2ec864fde5843f31470786f9a93c34884

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C:\Users\Admin\AppData\Local\Temp\Cab98E5.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

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C:\Windows\Installer\MSI9926.tmp

Filesize
95KB

MD5
acfd123d0e36411b9c1f556853dd9ea5

SHA1
812025408e21687dcd6e8eeb1667025a7b7abcbf

SHA256
d89dd83af50bfc6e325e2b4e7eecd982ec3ddee9ccb9cfef86d8a5593907c317

SHA512
e01da6d2867ca5a029d60bac781cef6639485255ce515bc8e094a43fa107b0d8c120b7bb3de75457407479de71585dfd9475b1b1f39d2d82d303586ccdb9024d

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