981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd

Analysis

max time kernel
159s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 04:26

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General

Target

981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
Size

51KB
MD5

55088c4d7b88dafd8d2716b890c010f9
SHA1

d1e802b4f4b951c499a3d5f0644c615581893c2d
SHA256

981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd
SHA512

084b1cac68764c2ec4c104bb801f71ef80d65006a277fd0d6259ef8171c36f68308dec191dac8f3f4eac40557496e0ed2fc73ea5bc5f1c062444255ab8720cf3
SSDEEP

768:kkYTL0bL6eLz7vydjFFw0rqEIn5CHV7M5EHdMtSL+/HVXULokCAGGYcuUHm:7qA6ynvyfFwxBn5czHmI+/+LHGGBtHm

Score

8^/10

persistence upx vmprotect

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\drivers\beep.sys	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\MediaCenter\Parameters\ServiceDll = "C:\\Windows\\system32\\RvmstdC.dll"	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2044-133-0x0000000000400000-0x000000000041A000-memory.dmp	upx

VMProtect packed file 3 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral2/files/0x0006000000022e63-132.dat	vmprotect
behavioral2/files/0x0006000000022e63-134.dat	vmprotect
behavioral2/files/0x0006000000022e63-135.dat	vmprotect

Loads dropped DLL 2 IoCs

pid	Process
2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
5068	svchost.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\RvmstdC.dll	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
656	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 1464	2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe	85
PID 2044 wrote to memory of 1464	2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe	85
PID 2044 wrote to memory of 1464	2044	981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe	85

C:\Users\Admin\AppData\Local\Temp\981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe
"C:\Users\Admin\AppData\Local\Temp\981929d38a638cd8f0f95171b68a27c509435753539751ba2803c2621eb758fd.exe"
1⤵
- Drops file in Drivers directory
- Sets DLL path for service in the registry
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\981929~1.EXE > nul
  2⤵
  PID:1464

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k krnlsrvc
1⤵
PID:4468

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k krnlsrvc
1⤵
- Loads dropped DLL
PID:5068

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\RvmstdC.dll

Filesize
73KB

MD5
aca381740b9a4ef3a0666d8064a0a3c1

SHA1
30d3b980d2933ce0208f2ee86774290cf48f4d54

SHA256
e7b1414428a436a882b516cb9d4e228cc173441935925cbf2207cba83225b3d4

SHA512
d9b392e9c0fd454fe5e965a0328e419b8a39fbe76969ac0738da621a15c826f348a37adbe0f4348e5a3413685f27009b6d40645b304e0f05a522c98ac135b69f

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

Filesize
73KB

MD5
aca381740b9a4ef3a0666d8064a0a3c1

SHA1
30d3b980d2933ce0208f2ee86774290cf48f4d54

SHA256
e7b1414428a436a882b516cb9d4e228cc173441935925cbf2207cba83225b3d4

SHA512
d9b392e9c0fd454fe5e965a0328e419b8a39fbe76969ac0738da621a15c826f348a37adbe0f4348e5a3413685f27009b6d40645b304e0f05a522c98ac135b69f

Download Submit
\??\c:\windows\SysWOW64\rvmstdc.dll

Filesize
73KB

MD5
aca381740b9a4ef3a0666d8064a0a3c1

SHA1
30d3b980d2933ce0208f2ee86774290cf48f4d54

SHA256
e7b1414428a436a882b516cb9d4e228cc173441935925cbf2207cba83225b3d4

SHA512
d9b392e9c0fd454fe5e965a0328e419b8a39fbe76969ac0738da621a15c826f348a37adbe0f4348e5a3413685f27009b6d40645b304e0f05a522c98ac135b69f

Download Submit
memory/1464-136-0x0000000000000000-mapping.dmp

Download
memory/2044-133-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download