a8a842c08d976e364b0039c9901296f224f653d3d5ccaefa6846d2b37e1d644a

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31-12-2023 03:23

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General

Target

26435ca5f4b06ddc758bcd8c39955618.exe
Size

12KB
MD5

26435ca5f4b06ddc758bcd8c39955618
SHA1

337b5f6c487f4a20fb8625de237a77589cc2706c
SHA256

a8a842c08d976e364b0039c9901296f224f653d3d5ccaefa6846d2b37e1d644a
SHA512

76ac98ae3b073dd9e11d477fd9f037f4add2144252087ba63ed1dbf51daed35e1e75780abd0b45f356d8af341e082d3d08d777d0f4bff7ba3bc7737dcdf8c4d8
SSDEEP

192:nPqfnykaUQ/ZatMdLhwepiJFDmvm8tkTuVvK8UxDQ9zVVU7SYycNtSk7:nPqcJZpDwegDmvm822exDmzVVU71b

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
3040	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1912	cueopsk.exe

Loads dropped DLL 2 IoCs

pid	Process
2188	26435ca5f4b06ddc758bcd8c39955618.exe
2188	26435ca5f4b06ddc758bcd8c39955618.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2188-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2188-4-0x0000000000240000-0x000000000024F000-memory.dmp	upx
behavioral1/files/0x000900000001225e-3.dat	upx
behavioral1/memory/2188-11-0x0000000000240000-0x000000000024F000-memory.dmp	upx
behavioral1/memory/1912-12-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2188-13-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2188-17-0x0000000000240000-0x000000000024F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\cueops.dll	26435ca5f4b06ddc758bcd8c39955618.exe
File created	C:\Windows\SysWOW64\cueopsk.exe	26435ca5f4b06ddc758bcd8c39955618.exe
File opened for modification	C:\Windows\SysWOW64\cueopsk.exe	26435ca5f4b06ddc758bcd8c39955618.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 1912	2188	26435ca5f4b06ddc758bcd8c39955618.exe	28
PID 2188 wrote to memory of 1912	2188	26435ca5f4b06ddc758bcd8c39955618.exe	28
PID 2188 wrote to memory of 1912	2188	26435ca5f4b06ddc758bcd8c39955618.exe	28
PID 2188 wrote to memory of 1912	2188	26435ca5f4b06ddc758bcd8c39955618.exe	28
PID 2188 wrote to memory of 3040	2188	26435ca5f4b06ddc758bcd8c39955618.exe	31
PID 2188 wrote to memory of 3040	2188	26435ca5f4b06ddc758bcd8c39955618.exe	31
PID 2188 wrote to memory of 3040	2188	26435ca5f4b06ddc758bcd8c39955618.exe	31
PID 2188 wrote to memory of 3040	2188	26435ca5f4b06ddc758bcd8c39955618.exe	31

C:\Users\Admin\AppData\Local\Temp\26435ca5f4b06ddc758bcd8c39955618.exe
"C:\Users\Admin\AppData\Local\Temp\26435ca5f4b06ddc758bcd8c39955618.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Windows\SysWOW64\cueopsk.exe
  C:\Windows\system32\cueopsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:1912
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\26435ca5f4b06ddc758bcd8c39955618.exe.bat
  2⤵
  - Deletes itself
  PID:3040

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\26435ca5f4b06ddc758bcd8c39955618.exe.bat

Filesize
182B

MD5
d8783fbca5b424e85bd961145ffc16ba

SHA1
98bf10cdb0fe39ec8e89832b9f3ea696741713d6

SHA256
65e74301167975b5d1b9882301e65d49280006fc004066c71423be228de9695a

SHA512
77c91b6991783b28234028904c6719944ae65b55de9012b05ace630e3546076aa8f995b15c98e5c8fdfed314a7cf4be1c7896604057ef5c6f08f781c3a386f06

Download Submit
\Windows\SysWOW64\cueopsk.exe

Filesize
12KB

MD5
26435ca5f4b06ddc758bcd8c39955618

SHA1
337b5f6c487f4a20fb8625de237a77589cc2706c

SHA256
a8a842c08d976e364b0039c9901296f224f653d3d5ccaefa6846d2b37e1d644a

SHA512
76ac98ae3b073dd9e11d477fd9f037f4add2144252087ba63ed1dbf51daed35e1e75780abd0b45f356d8af341e082d3d08d777d0f4bff7ba3bc7737dcdf8c4d8

Download Submit
memory/1912-12-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2188-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2188-4-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download
memory/2188-11-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download
memory/2188-13-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2188-17-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download