e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b

Analysis

max time kernel
156s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2022, 19:30

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General

Target

e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe
Size

94KB
MD5

1b935379fe91d95c8e04d92fb63b4140
SHA1

3327e31843867e61e7c4da6ec94dd820a40a0859
SHA256

e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b
SHA512

6b5cd05d1d92dba86352761495b106031d907f83a839f2ffd3570d00326a7baadc880f700880df99d8a92d48bd475bf2028b4abad73b40c06bc14d2c14c60130
SSDEEP

1536:9bBXbtwlqpbTiZlYnrZMBvB175dZ9bOl7iIzezzd7QuJvr+:TLGl+aZindMBvB175dZ9bOl7ST+

Score

8^/10

persistence

Malware Config

Signatures

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\WinxHjelpm32\Parameters\ServiceDll = "C:\\Windows\\system32\\rnsmmdna.dll"	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe

Loads dropped DLL 2 IoCs

pid	Process
4988	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe
4412	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4988	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 4828	4988	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe	83
PID 4988 wrote to memory of 4828	4988	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe	83
PID 4988 wrote to memory of 4828	4988	e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe	83

C:\Users\Admin\AppData\Local\Temp\e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe
"C:\Users\Admin\AppData\Local\Temp\e91c3c185ea9f44633aaa489e30359a16fede33fe8eda49c413bc7d3464b575b.exe"
1⤵
- Sets DLL path for service in the registry
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\E91C3C~1.EXE > nul
  2⤵
  PID:4828

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k krnlsrvc
1⤵
PID:4556

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k krnlsrvc
1⤵
- Loads dropped DLL
PID:4412

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\rnsmmdna.dll

Filesize
40KB

MD5
8d21ee1ebaa6512b87a26f7dfc767eba

SHA1
cea6d65968fe260947476e097fd6b9ca6e741daf

SHA256
8a6051d4998473d10e44e22be48b4cee1f5b3d2ebc8b48fb4b912e8356832d63

SHA512
35b95d69ce805c8a71bdc5f68b09bb318fa5821887ae8581e8a173f8ba819b5d994a38bdcfa734c3180ca0b0b59d7651c23c3c58d081ee02c3256bdde4a7642e

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

Filesize
40KB

MD5
8d21ee1ebaa6512b87a26f7dfc767eba

SHA1
cea6d65968fe260947476e097fd6b9ca6e741daf

SHA256
8a6051d4998473d10e44e22be48b4cee1f5b3d2ebc8b48fb4b912e8356832d63

SHA512
35b95d69ce805c8a71bdc5f68b09bb318fa5821887ae8581e8a173f8ba819b5d994a38bdcfa734c3180ca0b0b59d7651c23c3c58d081ee02c3256bdde4a7642e

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

Filesize
40KB

MD5
8d21ee1ebaa6512b87a26f7dfc767eba

SHA1
cea6d65968fe260947476e097fd6b9ca6e741daf

SHA256
8a6051d4998473d10e44e22be48b4cee1f5b3d2ebc8b48fb4b912e8356832d63

SHA512
35b95d69ce805c8a71bdc5f68b09bb318fa5821887ae8581e8a173f8ba819b5d994a38bdcfa734c3180ca0b0b59d7651c23c3c58d081ee02c3256bdde4a7642e

Download Submit