kinsing | 8786fe2c7ac85446839e15b87a0903db034c9a74a570d4cb79a87e9ef97cec77

Analysis

max time kernel
142s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 17:36

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General

Target
751c3019e0e58df216b3aa22972d101b.exe
Size 42KB
Sample240125-v6vajscgap
SHA256 8786fe2c7ac85446839e15b87a0903db034c9a74a570d4cb79a87e9ef97cec77
MD5 751c3019e0e58df216b3aa22972d101b
SHA1 b61ca1a4c5b4810c18252caa9970d85e1f88830b
SHA512 0a256725f7d10056e00aa8e9ff07b7b19ea20be7f954a99cffcbb2ff3280e6eb3f1c0c229ccb6ee5609898286d440f22edc0ef8bbf5a6b73519d26100452371c
SSDEEP 768:5DeMjCBkY+norh4dH5fMK8zSvSngYzubT5kI6xBcsXpzmjtN5:5i9KY7i538+vaubT5YBcemJ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

kinsing loader persistence upx

Malware Config

Signatures

Kinsing
Kinsing is a loader written in Golang.
loader kinsing

Executes dropped EXE 1 IoCs

pid	Process
2348	internet.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/files/0x00060000000231f9-3.dat	upx
behavioral2/memory/4952-6-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/memory/2348-7-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/memory/4952-10-0x0000000000400000-0x0000000000422000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\Windows Update = "internet.exe"	internet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "internet.exe"	internet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\Windows Update = "internet.exe"	751c3019e0e58df216b3aa22972d101b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "internet.exe"	751c3019e0e58df216b3aa22972d101b.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\internet.exe	751c3019e0e58df216b3aa22972d101b.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysExplr.exe	751c3019e0e58df216b3aa22972d101b.exe
File opened for modification	C:\Windows\SysExplr.exe	751c3019e0e58df216b3aa22972d101b.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command	751c3019e0e58df216b3aa22972d101b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "C:\\Windows\\SysExplr.exe \"%1\" "	751c3019e0e58df216b3aa22972d101b.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command	internet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "C:\\Windows\\SysExplr.exe \"%1\" "	internet.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 2348	4952	751c3019e0e58df216b3aa22972d101b.exe	85
PID 4952 wrote to memory of 2348	4952	751c3019e0e58df216b3aa22972d101b.exe	85
PID 4952 wrote to memory of 2348	4952	751c3019e0e58df216b3aa22972d101b.exe	85

C:\Users\Admin\AppData\Local\Temp\751c3019e0e58df216b3aa22972d101b.exe
"C:\Users\Admin\AppData\Local\Temp\751c3019e0e58df216b3aa22972d101b.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Windows\SysWOW64\internet.exe
  C:\Windows\system32\internet.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Modifies registry class
  PID:2348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

internet.exe

Path C:\Windows\SysWOW64\internet.exe
Size 42KB
SHA256 8786fe2c7ac85446839e15b87a0903db034c9a74a570d4cb79a87e9ef97cec77
MD5 751c3019e0e58df216b3aa22972d101b
SHA1 b61ca1a4c5b4810c18252caa9970d85e1f88830b
SHA512 0a256725f7d10056e00aa8e9ff07b7b19ea20be7f954a99cffcbb2ff3280e6eb3f1c0c229ccb6ee5609898286d440f22edc0ef8bbf5a6b73519d26100452371c
SSDEEP 768:5DeMjCBkY+norh4dH5fMK8zSvSngYzubT5kI6xBcsXpzmjtN5:5i9KY7i538+vaubT5YBcemJ
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2348-7-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4952-0-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/4952-6-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/4952-10-0x0000000000400000-0x0000000000422000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads