a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3

Resubmissions

24-02-2022 11:14

220224-nb4r6schd4 10

22-02-2022 08:33

220222-kfyj6sfggn 8

Analysis

max time kernel
152s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
22-02-2022 08:33

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General

Target

a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe
Size

267KB
MD5

e99b341dfd3147e5bbb385e7cc5e5e17
SHA1

e5d152281a61be6db5f3d8d42d985210c4faf283
SHA256

a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3
SHA512

74d9a6d521dcc6a74c47511185efa3d026d72ee03e4986fb700c1c0555a5511cc7f2c85de9ad2da6373683f3578275c3f7561f664115bfaa054be32b05bcd14c

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Mc.exeMc.exe

pid process

4120 Mc.exe
1732 Mc.exe

pid	process
4120	Mc.exe
1732	Mc.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe

Loads dropped DLL 2 IoCs

Processes:

Mc.exeMc.exe

pid process

4120 Mc.exe
1732 Mc.exe

pid	process
4120	Mc.exe
1732	Mc.exe

Drops file in System32 directory 8 IoCs

Processes:

Mc.exeMc.exe

description	ioc	process
File created	C:\Windows\SysWOW64\McUtil.dll	Mc.exe
File opened for modification	C:\Windows\SysWOW64\McUtil.dll	Mc.exe
File created	C:\Windows\SysWOW64\McUtil.dll	Mc.exe
File opened for modification	C:\Windows\SysWOW64\McUtil.dll.url	Mc.exe
File created	C:\Windows\SysWOW64\McUtil.dll.url	Mc.exe
File opened for modification	C:\Windows\SysWOW64\Mc.exe	Mc.exe
File created	C:\Windows\SysWOW64\Mc.exe	Mc.exe
File opened for modification	C:\Windows\SysWOW64\McUtil.dll	Mc.exe

Drops file in Windows directory 8 IoCs

Processes:

svchost.exeMc.exeMc.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\SysWOW64	Mc.exe
File opened for modification	C:\Windows\SysWOW64	Mc.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

Mc.exeMc.exesvchost.exe

description	pid	process
Token: SeDebugPrivilege	4120	Mc.exe
Token: SeTcbPrivilege	4120	Mc.exe
Token: SeDebugPrivilege	1732	Mc.exe
Token: SeTcbPrivilege	1732	Mc.exe
Token: SeShutdownPrivilege	4312	svchost.exe
Token: SeCreatePagefilePrivilege	4312	svchost.exe
Token: SeShutdownPrivilege	4312	svchost.exe
Token: SeCreatePagefilePrivilege	4312	svchost.exe
Token: SeShutdownPrivilege	4312	svchost.exe
Token: SeCreatePagefilePrivilege	4312	svchost.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe

description	pid	process	target process
PID 3376 wrote to memory of 4120	3376	a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe	Mc.exe
PID 3376 wrote to memory of 4120	3376	a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe	Mc.exe
PID 3376 wrote to memory of 4120	3376	a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe	Mc.exe

C:\Users\Admin\AppData\Local\Temp\a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe
"C:\Users\Admin\AppData\Local\Temp\a8e2b38c576bf19f6b0bed69c85c2a64445337087257cf566388f7b0d6d583a3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3376
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Mc.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Mc.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:4120

C:\Windows\SysWOW64\Mc.exe
C:\Windows\SysWOW64\Mc.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1732

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4312

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

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\RarSFX0\Mc.exe

MD5
884d46c01c762ad6ddd2759fd921bf71

SHA1
d201b130232e0ea411daa23c1ba2892fe6468712

SHA256
3124fcb79da0bdf9d0d1995e37b06f7929d83c1c4b60e38c104743be71170efe

SHA512
0acb3fe1050c1c07880ed2161956c4bee7c1e813a5fb518059b9bb88ed0bff50c108ad7b3708b6568413df4bdcc6f4d26dcd8759625a5ab77c4b26c1ba4f8813

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Mc.exe

MD5
884d46c01c762ad6ddd2759fd921bf71

SHA1
d201b130232e0ea411daa23c1ba2892fe6468712

SHA256
3124fcb79da0bdf9d0d1995e37b06f7929d83c1c4b60e38c104743be71170efe

SHA512
0acb3fe1050c1c07880ed2161956c4bee7c1e813a5fb518059b9bb88ed0bff50c108ad7b3708b6568413df4bdcc6f4d26dcd8759625a5ab77c4b26c1ba4f8813

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\McUtil.dll

MD5
ffa5f4b6b580d53bc311d6e5bace3110

SHA1
d599ca575b995d8de971aed8a64762225bde386d

SHA256
9857e40be1fb5b9b6db93dc03f96f6b3ff0ffab85af7944dddcac0e37775ab02

SHA512
20ac2b2508e931d545e952d29afa5ee8ce6600934e56ff8aee169ee2e1cb7c0d7eb1396c947edb45c31a434bd17ceada0cdfd5ea0c11ce7cc7298cbac4c9ca90

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\McUtil.dll

MD5
ffa5f4b6b580d53bc311d6e5bace3110

SHA1
d599ca575b995d8de971aed8a64762225bde386d

SHA256
9857e40be1fb5b9b6db93dc03f96f6b3ff0ffab85af7944dddcac0e37775ab02

SHA512
20ac2b2508e931d545e952d29afa5ee8ce6600934e56ff8aee169ee2e1cb7c0d7eb1396c947edb45c31a434bd17ceada0cdfd5ea0c11ce7cc7298cbac4c9ca90

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\McUtil.dll.url

MD5
d41dcdad6e032a4bb75ec02ad83f9ade

SHA1
202eeb63af2dbba617cff13e2f1ca8290d5b34b1

SHA256
c7de4513704c0081e828d9986867e2a8758c6b5312004c442043b9a8c053508c

SHA512
73f83c40c9c98cc3c60a47e4e903fbfa59d839afb423bf57d0397c8e3de7000c1b664d51b183c14c3d250570ab6987129b13011420016356f35ac0181d4caadf

Download Submit
C:\Windows\SysWOW64\Mc.exe

MD5
884d46c01c762ad6ddd2759fd921bf71

SHA1
d201b130232e0ea411daa23c1ba2892fe6468712

SHA256
3124fcb79da0bdf9d0d1995e37b06f7929d83c1c4b60e38c104743be71170efe

SHA512
0acb3fe1050c1c07880ed2161956c4bee7c1e813a5fb518059b9bb88ed0bff50c108ad7b3708b6568413df4bdcc6f4d26dcd8759625a5ab77c4b26c1ba4f8813

Download Submit
C:\Windows\SysWOW64\Mc.exe

MD5
884d46c01c762ad6ddd2759fd921bf71

SHA1
d201b130232e0ea411daa23c1ba2892fe6468712

SHA256
3124fcb79da0bdf9d0d1995e37b06f7929d83c1c4b60e38c104743be71170efe

SHA512
0acb3fe1050c1c07880ed2161956c4bee7c1e813a5fb518059b9bb88ed0bff50c108ad7b3708b6568413df4bdcc6f4d26dcd8759625a5ab77c4b26c1ba4f8813

Download Submit
C:\Windows\SysWOW64\McUtil.dll

MD5
ffa5f4b6b580d53bc311d6e5bace3110

SHA1
d599ca575b995d8de971aed8a64762225bde386d

SHA256
9857e40be1fb5b9b6db93dc03f96f6b3ff0ffab85af7944dddcac0e37775ab02

SHA512
20ac2b2508e931d545e952d29afa5ee8ce6600934e56ff8aee169ee2e1cb7c0d7eb1396c947edb45c31a434bd17ceada0cdfd5ea0c11ce7cc7298cbac4c9ca90

Download Submit
C:\Windows\SysWOW64\McUtil.dll

MD5
ffa5f4b6b580d53bc311d6e5bace3110

SHA1
d599ca575b995d8de971aed8a64762225bde386d

SHA256
9857e40be1fb5b9b6db93dc03f96f6b3ff0ffab85af7944dddcac0e37775ab02

SHA512
20ac2b2508e931d545e952d29afa5ee8ce6600934e56ff8aee169ee2e1cb7c0d7eb1396c947edb45c31a434bd17ceada0cdfd5ea0c11ce7cc7298cbac4c9ca90

Download Submit
C:\Windows\SysWOW64\McUtil.dll.url

MD5
d41dcdad6e032a4bb75ec02ad83f9ade

SHA1
202eeb63af2dbba617cff13e2f1ca8290d5b34b1

SHA256
c7de4513704c0081e828d9986867e2a8758c6b5312004c442043b9a8c053508c

SHA512
73f83c40c9c98cc3c60a47e4e903fbfa59d839afb423bf57d0397c8e3de7000c1b664d51b183c14c3d250570ab6987129b13011420016356f35ac0181d4caadf

Download Submit
memory/1732-143-0x0000000000500000-0x0000000000527000-memory.dmp

Filesize
156KB

Download
memory/4120-140-0x0000000000402000-0x0000000000403000-memory.dmp

Filesize
4KB

Download
memory/4120-141-0x0000000002120000-0x0000000002220000-memory.dmp

Filesize
1024KB

Download
memory/4120-142-0x0000000001F90000-0x0000000001FB7000-memory.dmp

Filesize
156KB

Download
memory/4312-144-0x000001ADF1560000-0x000001ADF1570000-memory.dmp

Filesize
64KB

Download
memory/4312-145-0x000001ADF1B20000-0x000001ADF1B30000-memory.dmp

Filesize
64KB

Download
memory/4312-146-0x000001ADF41E0000-0x000001ADF41E4000-memory.dmp

Filesize
16KB

Download