4132a9669330180d5604ca8398199e2a2d69ac2ba7827ff7a33af108517fa1f6

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 22:32

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General

Target

05b1869c9ab6c5240ea0692d129ebc01.exe
Size

17KB
MD5

05b1869c9ab6c5240ea0692d129ebc01
SHA1

6d6dbd7030f3500a6d18ec498e9e3a6c46110a45
SHA256

4132a9669330180d5604ca8398199e2a2d69ac2ba7827ff7a33af108517fa1f6
SHA512

433442c182b028ce5681352b7a74eb0190de2be88445a1f08a04e40dddf91c20f05b74b3f2aa8d3fa4e8a25ccdadec0a049d81a77e3d76d61e634d393ccfa953
SSDEEP

384:zViwqetokTFm7iXy5kQxWLVwmERYEM0UFn/oXhlq:zj5Tc7i3Qx6mmERUjF/

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
2932	lenyunsk.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4956-0-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral2/files/0x0007000000023207-3.dat	upx
behavioral2/memory/2932-6-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral2/memory/4956-7-0x0000000000400000-0x0000000000410000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\lenyunsk.exe	05b1869c9ab6c5240ea0692d129ebc01.exe
File opened for modification	C:\Windows\SysWOW64\lenyunsk.exe	05b1869c9ab6c5240ea0692d129ebc01.exe
File created	C:\Windows\SysWOW64\lenyuns.dll	05b1869c9ab6c5240ea0692d129ebc01.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 2932	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	88
PID 4956 wrote to memory of 2932	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	88
PID 4956 wrote to memory of 2932	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	88
PID 4956 wrote to memory of 2704	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	95
PID 4956 wrote to memory of 2704	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	95
PID 4956 wrote to memory of 2704	4956	05b1869c9ab6c5240ea0692d129ebc01.exe	95

C:\Users\Admin\AppData\Local\Temp\05b1869c9ab6c5240ea0692d129ebc01.exe
"C:\Users\Admin\AppData\Local\Temp\05b1869c9ab6c5240ea0692d129ebc01.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\SysWOW64\lenyunsk.exe
  C:\Windows\system32\lenyunsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2932
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\05b1869c9ab6c5240ea0692d129ebc01.exe.bat
  2⤵
  PID:2704

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\05b1869c9ab6c5240ea0692d129ebc01.exe.bat

Filesize
182B

MD5
7849ad9bce95627db42b5715acf33404

SHA1
3afcb3363eda8b45c31145e5cea287368a05e5b8

SHA256
3b07d74d0a395fa7f123df410bc0ce4c0885a30601915923fc6aa9da978672d9

SHA512
81454f0d1a56780e0ca16410fc0d402f0b0b3adfbf6b2423e6a32ba3e5a53648d328bbae282cbb4be61ec1787927e40fd6b824a004786fc93a3e548b2ce7e259

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

Filesize
17KB

MD5
05b1869c9ab6c5240ea0692d129ebc01

SHA1
6d6dbd7030f3500a6d18ec498e9e3a6c46110a45

SHA256
4132a9669330180d5604ca8398199e2a2d69ac2ba7827ff7a33af108517fa1f6

SHA512
433442c182b028ce5681352b7a74eb0190de2be88445a1f08a04e40dddf91c20f05b74b3f2aa8d3fa4e8a25ccdadec0a049d81a77e3d76d61e634d393ccfa953

Download Submit
memory/2932-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4956-0-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4956-7-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download