0e84afcd788a721f9584597013f6e7c634baafa7dc0e37bee766f7f00083d817

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-03-2024 11:07

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General

Target

c878362fcdc7b9ecc1e03207f2d27e71.exe
Size

11KB
MD5

c878362fcdc7b9ecc1e03207f2d27e71
SHA1

d0e14be590be6428fbea76144a0201eff7bd2b17
SHA256

0e84afcd788a721f9584597013f6e7c634baafa7dc0e37bee766f7f00083d817
SHA512

b4449d0e5b62fe4ecb02801f74fcf9d14758fb493043a26e03a63726d0c47c19eae3542dcfc9dc8ef04626eb2b0b977d6cc14818b06bb18442480ddf24b494d3
SSDEEP

192:GjhkFN9teAqlkuxdchqAr+X71vaAXvZgqXYMn3A7VbrE10cp:whknrHikuQe71vfCqXYMnQ7VbgT

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

Deletes itself 1 IoCs

pid	Process
1312	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2028	cmonosk.exe

Loads dropped DLL 2 IoCs

pid	Process
2208	c878362fcdc7b9ecc1e03207f2d27e71.exe
2208	c878362fcdc7b9ecc1e03207f2d27e71.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2208-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/files/0x000b00000001565d-3.dat	upx
behavioral1/memory/2028-11-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2208-12-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\cmonosk.exe	c878362fcdc7b9ecc1e03207f2d27e71.exe
File opened for modification	C:\Windows\SysWOW64\cmonosk.exe	c878362fcdc7b9ecc1e03207f2d27e71.exe
File created	C:\Windows\SysWOW64\cmonos.dll	c878362fcdc7b9ecc1e03207f2d27e71.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2028	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	28
PID 2208 wrote to memory of 2028	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	28
PID 2208 wrote to memory of 2028	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	28
PID 2208 wrote to memory of 2028	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	28
PID 2208 wrote to memory of 1312	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	29
PID 2208 wrote to memory of 1312	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	29
PID 2208 wrote to memory of 1312	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	29
PID 2208 wrote to memory of 1312	2208	c878362fcdc7b9ecc1e03207f2d27e71.exe	29

C:\Users\Admin\AppData\Local\Temp\c878362fcdc7b9ecc1e03207f2d27e71.exe
"C:\Users\Admin\AppData\Local\Temp\c878362fcdc7b9ecc1e03207f2d27e71.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmonosk.exe
  C:\Windows\system32\cmonosk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2028
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\c878362fcdc7b9ecc1e03207f2d27e71.exe.bat
  2⤵
  - Deletes itself
  PID:1312

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\c878362fcdc7b9ecc1e03207f2d27e71.exe.bat

Filesize
182B

MD5
61beee8b91cd28777d26e04eb2eb7ef7

SHA1
0296d00dc451a2eba5c0c1e6257d166791e22ad4

SHA256
339c7c5c37a2bdfc1a8e4a054b7b0f65e075fe39233c0dde9df98c8d6a473595

SHA512
db2b1e0f055711cf30d294b35580aa36b0ca1a0f608e81ab0fd573786c0d69ed049ad7ffe0ce88e66882d9fc6d48c356f87a28e2d1d5146ef6b6e5e028495105

Download Submit
\Windows\SysWOW64\cmonosk.exe

Filesize
11KB

MD5
c878362fcdc7b9ecc1e03207f2d27e71

SHA1
d0e14be590be6428fbea76144a0201eff7bd2b17

SHA256
0e84afcd788a721f9584597013f6e7c634baafa7dc0e37bee766f7f00083d817

SHA512
b4449d0e5b62fe4ecb02801f74fcf9d14758fb493043a26e03a63726d0c47c19eae3542dcfc9dc8ef04626eb2b0b977d6cc14818b06bb18442480ddf24b494d3

Download Submit
memory/2028-11-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2208-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2208-10-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/2208-12-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2208-16-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download