94e3a8f25dbff86ee6fe11ee045b70055357c08ae1723598a361c96eac5e2c24

Analysis

max time kernel
70s
max time network
85s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
08-11-2023 03:15

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General

Target

Bootkits/8dcc573293ae9a545655a47e23f106738a190f5318c31124bd3a73b12f128df6.msi
Size

433KB
MD5

c73606235b64566e6cbc67b9f608b4f8
SHA1

880256847cad1443b2865b27fad053667a30af21
SHA256

8dcc573293ae9a545655a47e23f106738a190f5318c31124bd3a73b12f128df6
SHA512

0c068c74fc4cf284652f014fd2a89bda64d2013a33501b715709bb5edd79ccc8d6ff79e91562be1c46bf89a7176aaf15dd4bf12fc6101d23b584d34a2a6b0d5e
SSDEEP

3072:943ygYXkj7q0vTYDryOjnpU6ij4qpXqnnDibAJBVk6YYA69Z3D3NPT+7qSS:945iLTqp4nwEzYYA83D3NPT+7

Score

7^/10

persistence

Malware Config

Signatures

Drops startup file 1 IoCs

Processes:

MsiExec.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OPYVMBXSEB.lnk MsiExec.exe
Loads dropped DLL 2 IoCs

Processes:

MsiExec.exe

pid process

2700 MsiExec.exe
2700 MsiExec.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OPYVMBXSEB.lnk	MsiExec.exe

pid	process
2700	MsiExec.exe
2700	MsiExec.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

MsiExec.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1154728922-3261336865-3456416385-1000\Software\Microsoft\Windows\CurrentVersion\Run\OPYVMBXSEB = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\OPYVMBXSEB.lnk"	MsiExec.exe

Blocklisted process makes network request 1 IoCs

Processes:

MsiExec.exe

flow pid process

2 2700 MsiExec.exe

flow	pid	process
2	2700	MsiExec.exe

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

Drops file in Windows directory 8 IoCs

Processes:

msiexec.exe

description	ioc	process
File opened for modification	C:\Windows\Installer\	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI5E58.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\f77013c.ipi	msiexec.exe
File created	C:\Windows\Installer\f770139.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f770139.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI1F4.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI3F8.tmp	msiexec.exe
File created	C:\Windows\Installer\f77013c.ipi	msiexec.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

msiexec.exe

pid process

2312 msiexec.exe
2312 msiexec.exe

pid	process
2312	msiexec.exe
2312	msiexec.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

msiexec.exemsiexec.exe

description	pid	process
Token: SeShutdownPrivilege	1184	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1184	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeSecurityPrivilege	2312	msiexec.exe
Token: SeCreateTokenPrivilege	1184	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1184	msiexec.exe
Token: SeLockMemoryPrivilege	1184	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1184	msiexec.exe
Token: SeMachineAccountPrivilege	1184	msiexec.exe
Token: SeTcbPrivilege	1184	msiexec.exe
Token: SeSecurityPrivilege	1184	msiexec.exe
Token: SeTakeOwnershipPrivilege	1184	msiexec.exe
Token: SeLoadDriverPrivilege	1184	msiexec.exe
Token: SeSystemProfilePrivilege	1184	msiexec.exe
Token: SeSystemtimePrivilege	1184	msiexec.exe
Token: SeProfSingleProcessPrivilege	1184	msiexec.exe
Token: SeIncBasePriorityPrivilege	1184	msiexec.exe
Token: SeCreatePagefilePrivilege	1184	msiexec.exe
Token: SeCreatePermanentPrivilege	1184	msiexec.exe
Token: SeBackupPrivilege	1184	msiexec.exe
Token: SeRestorePrivilege	1184	msiexec.exe
Token: SeShutdownPrivilege	1184	msiexec.exe
Token: SeDebugPrivilege	1184	msiexec.exe
Token: SeAuditPrivilege	1184	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1184	msiexec.exe
Token: SeChangeNotifyPrivilege	1184	msiexec.exe
Token: SeRemoteShutdownPrivilege	1184	msiexec.exe
Token: SeUndockPrivilege	1184	msiexec.exe
Token: SeSyncAgentPrivilege	1184	msiexec.exe
Token: SeEnableDelegationPrivilege	1184	msiexec.exe
Token: SeManageVolumePrivilege	1184	msiexec.exe
Token: SeImpersonatePrivilege	1184	msiexec.exe
Token: SeCreateGlobalPrivilege	1184	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe
Token: SeRestorePrivilege	2312	msiexec.exe
Token: SeTakeOwnershipPrivilege	2312	msiexec.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

msiexec.exeMsiExec.exe

pid process

1184 msiexec.exe
2700 MsiExec.exe
1184 msiexec.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

MsiExec.exe

pid process

2700 MsiExec.exe

pid	process
1184	msiexec.exe
2700	MsiExec.exe
1184	msiexec.exe

pid	process
2700	MsiExec.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

msiexec.exe

description	pid	process	target process
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe
PID 2312 wrote to memory of 2700	2312	msiexec.exe	MsiExec.exe

C:\Windows\system32\msiexec.exe
msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\Bootkits\8dcc573293ae9a545655a47e23f106738a190f5318c31124bd3a73b12f128df6.msi
1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1184

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:2312

C:\Windows\syswow64\MsiExec.exe
C:\Windows\syswow64\MsiExec.exe -Embedding 31A7A47686D9513862A8A74E8117E4AD
2⤵
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- Blocklisted process makes network request
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2700

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

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

Modify Registry

T1112

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

Replay Monitor

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Downloads

C:\Config.Msi\f77013d.rbs
Filesize
796B

MD5
618a785c96e0d83a2f90dfa4bcbcae62

SHA1
84af1c2392846aa20ce5e996c985d01d40300ca4

SHA256
e73027848e423bb1b86033c470dca5dafb1331429651091c4dea49831168d267

SHA512
60b4060305679a860d22bd0df0352ab087e482c2844679c2df413db2bb9352199ec25c749c69ccbd59e6777b48121e71dd8523ed472b2452209ab36b81e10cb3

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSI6bbb1.LOG
Filesize
21KB

MD5
6ec129523ec5d84db831c11c6a223f85

SHA1
0c4347962c9b7eb6d6a2246c0b8de1ce6161e1e6

SHA256
fb12ae17e3cfbc749dcf96f1d66c8b195e5e4fbf9dc36a9fb1d0aa8ec8a3cc30

SHA512
efc627cbb949bd9e4cfdf5f3bbfb23ca81c20d4d503a93799849deb7db41f26a123001271cf57173464b420f87f30ecec49df60d13a35de326b3b11fbc0dedd2

Download Submit
C:\Windows\Installer\MSI1F4.tmp
Filesize
91KB

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
C:\Windows\Installer\MSI3F8.tmp
Filesize
91KB

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI1F4.tmp
Filesize
91KB

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI3F8.tmp
Filesize
91KB

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
memory/2700-15-0x0000000000900000-0x0000000000902000-memory.dmp

Filesize
8KB

Download