cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d

Analysis

max time kernel
152s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2022, 09:23

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General

Target

cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
Size

49KB
MD5

b50f33170fdaf59fc140d1ca9813b882
SHA1

9963d4f87d58d354aaf17d5af9541e96db0ecc3d
SHA256

cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d
SHA512

60cc053db0c8702d511b72bd906dcb9a84bd353c01189704e9fbe8f7d0785a213c850ded214371d60de1159fcde0a0962080b608c7b7f5fe50fab58d652216b2
SSDEEP

768:5h3gFJo6Ih/Kdm65slk92C87XATbHnLgNM/PPdWeW+RyTZBYPgqADQEz3J5mUTQS:4o6Ebl5NwfLTPdWXmS2gqOQ8jTQS

Score

8^/10

persistence upx

Malware Config

Signatures

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3988-132-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3988-133-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3988-134-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3988-137-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/3988-138-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/3988-139-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4300-150-0x0000000010000000-0x0000000010014000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
4300	rundll32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\rqRKBSMd.dll,#1"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\nnnOfEVo.dll	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
File created	C:\Windows\SysWOW64\nnnOfEVo.dll	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
File created	C:\Windows\SysWOW64\rqRKBSMd.dll	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
File opened for modification	C:\Windows\SysWOW64\rqRKBSMd.dll	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{420959A7-1B3F-49EE-848E-6DE631A39223}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{420959A7-1B3F-49EE-848E-6DE631A39223}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{420959A7-1B3F-49EE-848E-6DE631A39223}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{420959A7-1B3F-49EE-848E-6DE631A39223}\InprocServer32\ = "C:\\Windows\\SysWow64\\rqRKBSMd.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe
4300	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 608	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	5
PID 3988 wrote to memory of 4300	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	83
PID 3988 wrote to memory of 4300	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	83
PID 3988 wrote to memory of 4300	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	83
PID 3988 wrote to memory of 4332	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	84
PID 3988 wrote to memory of 4332	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	84
PID 3988 wrote to memory of 4332	3988	cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe	84

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

C:\Users\Admin\AppData\Local\Temp\cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe
"C:\Users\Admin\AppData\Local\Temp\cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\rqRKBSMd.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:4300
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\cff726feb40a14b879df07b04c12fcfe127d240fb0ca515399d84253b6aa244d.exe"
  2⤵
  PID:4332

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:\Users\Admin\AppData\Local\Temp\removalfile.bat

Filesize
43B

MD5
9a7ef09167a6f4433681b94351509043

SHA1
259b1375ed8e84943ca1d42646bb416325c89e12

SHA256
d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7

SHA512
96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df

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

Filesize
33KB

MD5
664566aef53a9844200b898262806536

SHA1
30b0cc0b749d97dd11745aab0c49ffec040c202a

SHA256
7626ec730b5cfb2ab9546b8495b26f35fb6df0452727d161f38fb8c3888f383f

SHA512
dad0f14efb9330d4c41176d6a15839eb085855e2dda364077ae381bea09242514d02414d6c372162ce39ae913d043976b6d5ce2b700ac552fec241d823146c60

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

Filesize
33KB

MD5
664566aef53a9844200b898262806536

SHA1
30b0cc0b749d97dd11745aab0c49ffec040c202a

SHA256
7626ec730b5cfb2ab9546b8495b26f35fb6df0452727d161f38fb8c3888f383f

SHA512
dad0f14efb9330d4c41176d6a15839eb085855e2dda364077ae381bea09242514d02414d6c372162ce39ae913d043976b6d5ce2b700ac552fec241d823146c60

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

Filesize
33KB

MD5
664566aef53a9844200b898262806536

SHA1
30b0cc0b749d97dd11745aab0c49ffec040c202a

SHA256
7626ec730b5cfb2ab9546b8495b26f35fb6df0452727d161f38fb8c3888f383f

SHA512
dad0f14efb9330d4c41176d6a15839eb085855e2dda364077ae381bea09242514d02414d6c372162ce39ae913d043976b6d5ce2b700ac552fec241d823146c60

Download Submit
memory/3988-140-0x00000000022E0000-0x00000000022E6000-memory.dmp

Filesize
24KB

Download
memory/3988-134-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3988-138-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/3988-139-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/3988-132-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3988-141-0x00000000005B0000-0x00000000005BB000-memory.dmp

Filesize
44KB

Download
memory/3988-142-0x00000000022E0000-0x00000000022E6000-memory.dmp

Filesize
24KB

Download
memory/3988-133-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3988-137-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/3988-135-0x00000000005B0000-0x00000000005BB000-memory.dmp

Filesize
44KB

Download
memory/4300-150-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4300-151-0x0000000002B10000-0x0000000002B16000-memory.dmp

Filesize
24KB

Download
memory/4300-152-0x0000000002B10000-0x0000000002B16000-memory.dmp

Filesize
24KB

Download