84bae27563e88834580405573256385088d7e25066df5e0517437e37c15c8eb8

General

Target

tmp.exe
Size

48KB
MD5

d9c3c2288e361dfd4704ad811cae84cb
SHA1

21254fae99dd0f9f9410ca38bfb5f6aa76ff83a3
SHA256

84bae27563e88834580405573256385088d7e25066df5e0517437e37c15c8eb8
SHA512

7d9a3da4e933660749a33fb875a02f09f23512310082d56c485bd268a60ef955c7a5edb5ef7999670bccdb4e7944317a31b6afd8ca12f50b4cca277d5089dc8d
SSDEEP

768:zynb12Aw5J6HC4kq5Jp9bjAzhyY55J+NStcEeUlyqgZl4p67LhPC:Ub1MsHz3JDwhyWr+N95OTga64

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

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SERDKS7\Parameters\ServiceDll = "C:\\Windows\\system32\\240656062.dll"	tmp.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-642304425-1816607141-2958861556-1000\Control Panel\International\Geo\Nation	tmp.exe

Executes dropped EXE 1 IoCs

pid	Process
4200	SERDKS7.exe

Loads dropped DLL 3 IoCs

pid	Process
3708	tmp.exe
3040	svchost.exe
4200	SERDKS7.exe

Creates a Windows Service
persistence

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\240656062.dll	tmp.exe
File created	C:\Windows\SysWOW64\SERDKS7.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\SERDKS7.exe	svchost.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	SERDKS7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	SERDKS7.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	SERDKS7.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	SERDKS7.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	SERDKS7.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie	SERDKS7.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7"	SERDKS7.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2220	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3708	tmp.exe
3708	tmp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3708	tmp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3708	tmp.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 2540	3708	tmp.exe	89
PID 3708 wrote to memory of 2540	3708	tmp.exe	89
PID 3708 wrote to memory of 2540	3708	tmp.exe	89
PID 2540 wrote to memory of 2220	2540	cmd.exe	91
PID 2540 wrote to memory of 2220	2540	cmd.exe	91
PID 2540 wrote to memory of 2220	2540	cmd.exe	91
PID 3040 wrote to memory of 4200	3040	svchost.exe	92
PID 3040 wrote to memory of 4200	3040	svchost.exe	92
PID 3040 wrote to memory of 4200	3040	svchost.exe	92

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Sets DLL path for service in the registry
- Checks computer location settings
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 1 && del /f/q "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 1
    3⤵
    - Runs ping.exe
    PID:2220

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SERDKS7"
1⤵
PID:2316

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "SERDKS7"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\SysWOW64\SERDKS7.exe
  C:\Windows\system32\SERDKS7.exe "c:\windows\system32\240656062.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  PID:4200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\240656062.dll

Filesize
25KB

MD5
1f01457e935405d1a926c8c598713920

SHA1
6c2c9664adc890e9d7f96469817dc5f3e6a5d515

SHA256
77c15d1ac75ad596b36e0828349940253692ae65dadd3f482a1c54e9ce1e33ed

SHA512
d4d5e5dcb528129a4b705f0e82b3bc93917c05bce9a822c0dea80339e80eda16e4706cf2f6a78c8769da27db7aac949c8640005080b91fa206f783be64bb8fbd

Download Submit
C:\Windows\SysWOW64\240656062.dll

Filesize
25KB

MD5
1f01457e935405d1a926c8c598713920

SHA1
6c2c9664adc890e9d7f96469817dc5f3e6a5d515

SHA256
77c15d1ac75ad596b36e0828349940253692ae65dadd3f482a1c54e9ce1e33ed

SHA512
d4d5e5dcb528129a4b705f0e82b3bc93917c05bce9a822c0dea80339e80eda16e4706cf2f6a78c8769da27db7aac949c8640005080b91fa206f783be64bb8fbd

Download Submit
C:\Windows\SysWOW64\240656062.dll

Filesize
25KB

MD5
1f01457e935405d1a926c8c598713920

SHA1
6c2c9664adc890e9d7f96469817dc5f3e6a5d515

SHA256
77c15d1ac75ad596b36e0828349940253692ae65dadd3f482a1c54e9ce1e33ed

SHA512
d4d5e5dcb528129a4b705f0e82b3bc93917c05bce9a822c0dea80339e80eda16e4706cf2f6a78c8769da27db7aac949c8640005080b91fa206f783be64bb8fbd

Download Submit
C:\Windows\SysWOW64\SERDKS7.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Windows\SysWOW64\SERDKS7.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
\??\c:\windows\SysWOW64\240656062.dll

Filesize
25KB

MD5
1f01457e935405d1a926c8c598713920

SHA1
6c2c9664adc890e9d7f96469817dc5f3e6a5d515

SHA256
77c15d1ac75ad596b36e0828349940253692ae65dadd3f482a1c54e9ce1e33ed

SHA512
d4d5e5dcb528129a4b705f0e82b3bc93917c05bce9a822c0dea80339e80eda16e4706cf2f6a78c8769da27db7aac949c8640005080b91fa206f783be64bb8fbd

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads