91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449

Analysis

max time kernel
151s
max time network
150s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01-12-2022 21:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe
Size

445KB
MD5

36c835ff6451b2b5621a7a98b6398bf5
SHA1

54c0619ad1b0f5ed0d10739d48a323a79582ac07
SHA256

91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449
SHA512

c95adf9ae8e8da3656a5e64281b2f9bd1f180c96fb308a7b8252fa3b7af558b1051d163e3c1fbbd5c973d5eeaef25072e98339318d4b91a7a7c7942b52bc0af3
SSDEEP

6144:dyJwXzalfrjZDiOpNyTKCYCNx6RX1r8nXxXIejPV4LFiP3bCWo:dyJwXelPVzpNyKCYCHUsXxjK8Vo

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1716	ymkir.exe

Deletes itself 1 IoCs

pid	Process
580	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.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\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\Currentversion\Run	ymkir.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\{7BD94DA8-4FEF-AD4D-5225-887A4931AB67} = "C:\\Users\\Admin\\AppData\\Roaming\\Foyq\\ymkir.exe"	ymkir.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1652 set thread context of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe
1716	ymkir.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe
1716	ymkir.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1716	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	28
PID 1652 wrote to memory of 1716	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	28
PID 1652 wrote to memory of 1716	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	28
PID 1652 wrote to memory of 1716	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	28
PID 1716 wrote to memory of 1132	1716	ymkir.exe	19
PID 1716 wrote to memory of 1132	1716	ymkir.exe	19
PID 1716 wrote to memory of 1132	1716	ymkir.exe	19
PID 1716 wrote to memory of 1132	1716	ymkir.exe	19
PID 1716 wrote to memory of 1132	1716	ymkir.exe	19
PID 1716 wrote to memory of 1196	1716	ymkir.exe	18
PID 1716 wrote to memory of 1196	1716	ymkir.exe	18
PID 1716 wrote to memory of 1196	1716	ymkir.exe	18
PID 1716 wrote to memory of 1196	1716	ymkir.exe	18
PID 1716 wrote to memory of 1196	1716	ymkir.exe	18
PID 1716 wrote to memory of 1256	1716	ymkir.exe	17
PID 1716 wrote to memory of 1256	1716	ymkir.exe	17
PID 1716 wrote to memory of 1256	1716	ymkir.exe	17
PID 1716 wrote to memory of 1256	1716	ymkir.exe	17
PID 1716 wrote to memory of 1256	1716	ymkir.exe	17
PID 1716 wrote to memory of 1652	1716	ymkir.exe	27
PID 1716 wrote to memory of 1652	1716	ymkir.exe	27
PID 1716 wrote to memory of 1652	1716	ymkir.exe	27
PID 1716 wrote to memory of 1652	1716	ymkir.exe	27
PID 1716 wrote to memory of 1652	1716	ymkir.exe	27
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29
PID 1652 wrote to memory of 580	1652	91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe	29

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1256
- C:\Users\Admin\AppData\Local\Temp\91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe
  "C:\Users\Admin\AppData\Local\Temp\91f2e9247915439dcab58bf89575d66c4935ee080cd1fee0ebd45540718c5449.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:1652
- - C:\Users\Admin\AppData\Roaming\Foyq\ymkir.exe
    "C:\Users\Admin\AppData\Roaming\Foyq\ymkir.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of UnmapMainImage
    - Suspicious use of WriteProcessMemory
    PID:1716
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\tmp919f1ad3.bat"
    3⤵
    - Deletes itself
    PID:580

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1196

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1132

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp919f1ad3.bat

Filesize
307B

MD5
4bf9ecf89c6bf1a23b6dae4b08e742ef

SHA1
3b38cbe55e6807faf73616547f2a8f4d473405d9

SHA256
2c5fe8e68c303f04db29286d4298b6a41ba8bb81edb981322563c0c728c0cade

SHA512
e9c4f5b043dc2ed6e5e7323be98ac6efeeb444f058abe2563f61ef5c478d296dd257cc7cfaef8468d4f12775743eab4f87bc0402b15de6ce554e81f6f0c01f4d

Download Submit
C:\Users\Admin\AppData\Roaming\Foyq\ymkir.exe

Filesize
445KB

MD5
1b871e1435b054c2e77ed42148a5943c

SHA1
13170d562f7ef96915915dc9b4a2ab5d9cca18b2

SHA256
b577ef25d87c9b725b822731f58d96c8af483506e96b2db9e03e69ee0c8f935b

SHA512
bbf24397d99884a059746d64cd5e01656c4ac8f032c795403998e2e23e94fac94fad735eb19bdb5dde31dccd68bd44cb8d196b9f8593e93c01fcc146c2a55549

Download Submit
C:\Users\Admin\AppData\Roaming\Foyq\ymkir.exe

Filesize
445KB

MD5
1b871e1435b054c2e77ed42148a5943c

SHA1
13170d562f7ef96915915dc9b4a2ab5d9cca18b2

SHA256
b577ef25d87c9b725b822731f58d96c8af483506e96b2db9e03e69ee0c8f935b

SHA512
bbf24397d99884a059746d64cd5e01656c4ac8f032c795403998e2e23e94fac94fad735eb19bdb5dde31dccd68bd44cb8d196b9f8593e93c01fcc146c2a55549

Download Submit
\Users\Admin\AppData\Roaming\Foyq\ymkir.exe

Filesize
445KB

MD5
1b871e1435b054c2e77ed42148a5943c

SHA1
13170d562f7ef96915915dc9b4a2ab5d9cca18b2

SHA256
b577ef25d87c9b725b822731f58d96c8af483506e96b2db9e03e69ee0c8f935b

SHA512
bbf24397d99884a059746d64cd5e01656c4ac8f032c795403998e2e23e94fac94fad735eb19bdb5dde31dccd68bd44cb8d196b9f8593e93c01fcc146c2a55549

Download Submit
memory/580-107-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-113-0x0000000000050000-0x000000000009C000-memory.dmp

Filesize
304KB

Download
memory/580-100-0x0000000000050000-0x000000000009C000-memory.dmp

Filesize
304KB

Download
memory/580-99-0x0000000000050000-0x000000000009C000-memory.dmp

Filesize
304KB

Download
memory/580-101-0x0000000000050000-0x000000000009C000-memory.dmp

Filesize
304KB

Download
memory/580-111-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-106-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-110-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-109-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-108-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/580-97-0x0000000000050000-0x000000000009C000-memory.dmp

Filesize
304KB

Download
memory/1132-67-0x0000000000310000-0x000000000035C000-memory.dmp

Filesize
304KB

Download
memory/1132-66-0x0000000000310000-0x000000000035C000-memory.dmp

Filesize
304KB

Download
memory/1132-65-0x0000000000310000-0x000000000035C000-memory.dmp

Filesize
304KB

Download
memory/1132-64-0x0000000000310000-0x000000000035C000-memory.dmp

Filesize
304KB

Download
memory/1132-62-0x0000000000310000-0x000000000035C000-memory.dmp

Filesize
304KB

Download
memory/1196-70-0x0000000000120000-0x000000000016C000-memory.dmp

Filesize
304KB

Download
memory/1196-71-0x0000000000120000-0x000000000016C000-memory.dmp

Filesize
304KB

Download
memory/1196-72-0x0000000000120000-0x000000000016C000-memory.dmp

Filesize
304KB

Download
memory/1196-73-0x0000000000120000-0x000000000016C000-memory.dmp

Filesize
304KB

Download
memory/1256-81-0x0000000002B20000-0x0000000002B6C000-memory.dmp

Filesize
304KB

Download
memory/1256-83-0x0000000002B20000-0x0000000002B6C000-memory.dmp

Filesize
304KB

Download
memory/1256-78-0x0000000002B20000-0x0000000002B6C000-memory.dmp

Filesize
304KB

Download
memory/1256-80-0x0000000002B20000-0x0000000002B6C000-memory.dmp

Filesize
304KB

Download
memory/1652-75-0x00000000002B0000-0x00000000002FC000-memory.dmp

Filesize
304KB

Download
memory/1652-87-0x0000000000490000-0x00000000004DC000-memory.dmp

Filesize
304KB

Download
memory/1652-94-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1652-91-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1652-92-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1652-55-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1652-90-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1652-56-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1652-77-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1652-103-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1652-104-0x0000000000490000-0x00000000004DC000-memory.dmp

Filesize
304KB

Download
memory/1652-89-0x0000000000490000-0x00000000004DC000-memory.dmp

Filesize
304KB

Download
memory/1652-88-0x0000000000490000-0x00000000004DC000-memory.dmp

Filesize
304KB

Download
memory/1652-93-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1652-86-0x0000000000490000-0x00000000004DC000-memory.dmp

Filesize
304KB

Download
memory/1652-54-0x0000000076041000-0x0000000076043000-memory.dmp

Filesize
8KB

Download
memory/1716-79-0x0000000001CB0000-0x0000000001CFC000-memory.dmp

Filesize
304KB

Download
memory/1716-82-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1716-114-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download