a9cd3d966d453afd424d9ac54df414b80073bb51d249f4089185976fb316e254

Resubmissions

07-04-2023 08:11

230407-j3f3zaae2s 7

07-04-2023 08:08

230407-j1q56aad91 7

07-04-2023 07:42

230407-jj2wbsad6z 7

Analysis

max time kernel
150s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
07-04-2023 08:08

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General

Target

MEMZ 3.0/MEMZ.bat
Size

12KB
MD5

13a43c26bb98449fd82d2a552877013a
SHA1

71eb7dc393ac1f204488e11f5c1eef56f1e746af
SHA256

5f52365accb76d679b2b3946870439a62eb8936b9a0595f0fb0198138106b513
SHA512

602518b238d80010fa88c2c88699f70645513963ef4f148a0345675738cf9b0c23b9aeb899d9f7830cc1e5c7e9c7147b2dc4a9222770b4a052ee0c879062cd5a
SSDEEP

384:nnLhRNiqt0kCH2LR0GPXxGiZgCz+KG/yKhLdW79HOli+lz3:nLhRN9t0SR4iZtzlREBWhuF

Score

7^/10

bootkit persistence

Malware Config

Signatures

Executes dropped EXE 7 IoCs

Processes:

MEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exe

pid process

268 MEMZ.exe
1824 MEMZ.exe
1868 MEMZ.exe
1820 MEMZ.exe
1540 MEMZ.exe
600 MEMZ.exe
1140 MEMZ.exe
Loads dropped DLL 1 IoCs

Processes:

MEMZ.exe

pid process

268 MEMZ.exe
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1067

Processes:

MEMZ.exe

description ioc process

File opened for modification \??\PhysicalDrive0 MEMZ.exe
Drops file in System32 directory 1 IoCs

Processes:

mmc.exe

description ioc process

File opened for modification C:\Windows\System32\devmgmt.msc mmc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

Processes:

MEMZ.exe

pid process

268 MEMZ.exe

pid	process
268	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1140	MEMZ.exe

pid	process
268	MEMZ.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	MEMZ.exe

description	ioc	process
File opened for modification	C:\Windows\System32\devmgmt.msc	mmc.exe

pid	process
268	MEMZ.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

MEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exe

pid	process
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1820	MEMZ.exe
1540	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe
600	MEMZ.exe
1824	MEMZ.exe
1868	MEMZ.exe
1540	MEMZ.exe
1820	MEMZ.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

mmc.exe

pid process

1528 mmc.exe

pid	process
1528	mmc.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

mmc.exeAUDIODG.EXE

description	pid	process
Token: 33	1528	mmc.exe
Token: SeIncBasePriorityPrivilege	1528	mmc.exe
Token: 33	1528	mmc.exe
Token: SeIncBasePriorityPrivilege	1528	mmc.exe
Token: 33	1332	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1332	AUDIODG.EXE
Token: 33	1332	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1332	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

cscript.exe

pid process

916 cscript.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

mmc.exemmc.exe

pid process

748 mmc.exe
1528 mmc.exe
1528 mmc.exe

pid	process
916	cscript.exe

pid	process
748	mmc.exe
1528	mmc.exe
1528	mmc.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

cmd.exeMEMZ.exeMEMZ.exemmc.exe

description	pid	process	target process
PID 1712 wrote to memory of 916	1712	cmd.exe	cscript.exe
PID 1712 wrote to memory of 916	1712	cmd.exe	cscript.exe
PID 1712 wrote to memory of 916	1712	cmd.exe	cscript.exe
PID 1712 wrote to memory of 268	1712	cmd.exe	MEMZ.exe
PID 1712 wrote to memory of 268	1712	cmd.exe	MEMZ.exe
PID 1712 wrote to memory of 268	1712	cmd.exe	MEMZ.exe
PID 1712 wrote to memory of 268	1712	cmd.exe	MEMZ.exe
PID 268 wrote to memory of 1824	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1824	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1824	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1824	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1868	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1868	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1868	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1868	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1820	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1820	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1820	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1820	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1540	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1540	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1540	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1540	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 600	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 600	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 600	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 600	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1140	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1140	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1140	268	MEMZ.exe	MEMZ.exe
PID 268 wrote to memory of 1140	268	MEMZ.exe	MEMZ.exe
PID 1140 wrote to memory of 1336	1140	MEMZ.exe	notepad.exe
PID 1140 wrote to memory of 1336	1140	MEMZ.exe	notepad.exe
PID 1140 wrote to memory of 1336	1140	MEMZ.exe	notepad.exe
PID 1140 wrote to memory of 1336	1140	MEMZ.exe	notepad.exe
PID 1140 wrote to memory of 748	1140	MEMZ.exe	mmc.exe
PID 1140 wrote to memory of 748	1140	MEMZ.exe	mmc.exe
PID 1140 wrote to memory of 748	1140	MEMZ.exe	mmc.exe
PID 1140 wrote to memory of 748	1140	MEMZ.exe	mmc.exe
PID 748 wrote to memory of 1528	748	mmc.exe	mmc.exe
PID 748 wrote to memory of 1528	748	mmc.exe	mmc.exe
PID 748 wrote to memory of 1528	748	mmc.exe	mmc.exe
PID 748 wrote to memory of 1528	748	mmc.exe	mmc.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\MEMZ.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1712

C:\Windows\system32\cscript.exe
cscript x.js
2⤵
- Suspicious use of FindShellTrayWindow
PID:916

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: CmdExeWriteProcessMemorySpam
- Suspicious use of WriteProcessMemory
PID:268

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1824

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1868

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1820

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1540

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:600

C:\Users\Admin\AppData\Roaming\MEMZ.exe
"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /main
3⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\SysWOW64\notepad.exe
"C:\Windows\System32\notepad.exe" \note.txt
4⤵
PID:1336

C:\Windows\SysWOW64\mmc.exe
"C:\Windows\system32\mmc.exe" "C:\Windows\System32\devmgmt.msc"
4⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:748

C:\Windows\system32\mmc.exe
"C:\Windows\System32\devmgmt.msc" "C:\Windows\System32\devmgmt.msc"
5⤵
- Drops file in System32 directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1528

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x5a8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\Local\Temp\MEMZ 3.0\x

Filesize
4KB

MD5
c6e68ff1dc039af122429c3c5418630f

SHA1
771938ab02aaf6714782ea1c70420794848b1d9c

SHA256
b18e0bb23b9b78ca561b9499853ec5be84f67fcb7db5c7e207c6da1b89c17dbb

SHA512
837b8b31d381030b79a1b85449238b8770999dde21dd705aec81a0205cfc40cb2f65fb7877de479bae9ca96c1233a62078332c93db764389bd6f26985b61c9b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\x

Filesize
10KB

MD5
fc59b7d2eb1edbb9c8cb9eb08115a98e

SHA1
90a6479ce14f8548df54c434c0a524e25efd9d17

SHA256
a05b9be9dd87492f265094146e18d628744c6b09c0e7efaabf228a9f1091a279

SHA512
3392cfc0dbddb37932e76da5a49f4e010a49aaa863c882b85cccab676cd458cfc8f880d8a0e0dc7581175f447e6b0a002da1591ecd14756650bb74996eacd2b1

Download Submit
C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\x.js

Filesize
448B

MD5
8eec8704d2a7bc80b95b7460c06f4854

SHA1
1b34585c1fa7ec0bd0505478ac9dbb8b8d19f326

SHA256
aa01b8864b43e92077a106ed3d4656a511f3ba1910fba40c78a32ee6a621d596

SHA512
e274b92810e9a30627a65f87448d784967a2fcfbf49858cbe6ccb841f09e0f53fde253ecc1ea0c7de491d8cc56a6cf8c79d1b7c657e72928cfb0479d11035210

Download Submit
C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\z.zip

Filesize
7KB

MD5
cf0c19ef6909e5c1f10c8460ba9299d8

SHA1
875b575c124acfc1a4a21c1e05acb9690e50b880

SHA256
abb834ebd4b7d7f8ddf545976818f41b3cb51d2b895038a56457616d3a2c6776

SHA512
d930a022a373c283f35d103e277487c2034a0b0814913b8f6ec695b45e20528667aa830eeab58e4483d523bd6a755a16a5379095cb137db6c91909a545a19a2f

Download Submit
C:\Users\Admin\AppData\Local\Temp\MEMZ3~1.0\z.zip

Filesize
7KB

MD5
cf0c19ef6909e5c1f10c8460ba9299d8

SHA1
875b575c124acfc1a4a21c1e05acb9690e50b880

SHA256
abb834ebd4b7d7f8ddf545976818f41b3cb51d2b895038a56457616d3a2c6776

SHA512
d930a022a373c283f35d103e277487c2034a0b0814913b8f6ec695b45e20528667aa830eeab58e4483d523bd6a755a16a5379095cb137db6c91909a545a19a2f

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
C:\note.txt

Filesize
218B

MD5
afa6955439b8d516721231029fb9ca1b

SHA1
087a043cc123c0c0df2ffadcf8e71e3ac86bbae9

SHA256
8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270

SHA512
5da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf

Download Submit
\Users\Admin\AppData\Roaming\MEMZ.exe

Filesize
12KB

MD5
a7bcf7ea8e9f3f36ebfb85b823e39d91

SHA1
761168201520c199dba68add3a607922d8d4a86e

SHA256
3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

SHA512
89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523

Download Submit
memory/1528-228-0x00000000022F0000-0x00000000022F1000-memory.dmp

Filesize
4KB

Download
memory/1528-229-0x000007FEF6B60000-0x000007FEF6B9A000-memory.dmp

Filesize
232KB

Download