f2090230c2c3ae208cb137ec72bea7536a598a9a20751b68451cb7412b60c1ea

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
24/01/2024, 12:12

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General

Target

7235d8195a01b40e76682dc285f8ab21.exe
Size

11KB
MD5

7235d8195a01b40e76682dc285f8ab21
SHA1

b8340dd133116f938f6a38c3ba6cfa5fc4c790d0
SHA256

f2090230c2c3ae208cb137ec72bea7536a598a9a20751b68451cb7412b60c1ea
SHA512

e3a084aa256b72d3696bfbc9720bb15ef165ed79a543dd168eadb4b38b8b760fe85b7a36ba0b589c712f8d6ad2f1db82a61e2e6046f099d4e7a93dae791dcce6
SSDEEP

192:CuxZH2B7O5mv/scm+eTo/+Dkl4usLZRtC45v2CmZ4Vlt3twKeYOTpzs+:CuLWB7ImnE+eTo/g84usLRCobHFdw2O3

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
2712	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2492	comboausk.exe

Loads dropped DLL 2 IoCs

pid	Process
2240	7235d8195a01b40e76682dc285f8ab21.exe
2240	7235d8195a01b40e76682dc285f8ab21.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2240-1-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2240-4-0x0000000000030000-0x000000000003F000-memory.dmp	upx
behavioral1/files/0x000a000000012247-11.dat	upx
behavioral1/memory/2240-10-0x0000000000030000-0x000000000003F000-memory.dmp	upx
behavioral1/memory/2492-12-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral1/memory/2240-20-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\comboaus.dll	7235d8195a01b40e76682dc285f8ab21.exe
File created	C:\Windows\SysWOW64\comboausk.exe	7235d8195a01b40e76682dc285f8ab21.exe
File opened for modification	C:\Windows\SysWOW64\comboausk.exe	7235d8195a01b40e76682dc285f8ab21.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2240	7235d8195a01b40e76682dc285f8ab21.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2492	2240	7235d8195a01b40e76682dc285f8ab21.exe	28
PID 2240 wrote to memory of 2492	2240	7235d8195a01b40e76682dc285f8ab21.exe	28
PID 2240 wrote to memory of 2492	2240	7235d8195a01b40e76682dc285f8ab21.exe	28
PID 2240 wrote to memory of 2492	2240	7235d8195a01b40e76682dc285f8ab21.exe	28
PID 2240 wrote to memory of 2712	2240	7235d8195a01b40e76682dc285f8ab21.exe	29
PID 2240 wrote to memory of 2712	2240	7235d8195a01b40e76682dc285f8ab21.exe	29
PID 2240 wrote to memory of 2712	2240	7235d8195a01b40e76682dc285f8ab21.exe	29
PID 2240 wrote to memory of 2712	2240	7235d8195a01b40e76682dc285f8ab21.exe	29

C:\Users\Admin\AppData\Local\Temp\7235d8195a01b40e76682dc285f8ab21.exe
"C:\Users\Admin\AppData\Local\Temp\7235d8195a01b40e76682dc285f8ab21.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\comboausk.exe
  C:\Windows\system32\comboausk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:2492
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\7235d8195a01b40e76682dc285f8ab21.exe.bat
  2⤵
  - Deletes itself
  PID:2712

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

C:\Users\Admin\AppData\Local\Temp\7235d8195a01b40e76682dc285f8ab21.exe.bat

Filesize
182B

MD5
75ad80ba771b9be9077d50d6b746ac02

SHA1
999dfa0b83386ed1b39c9fcaa7286c9438804b25

SHA256
876727afc4b21ef9a237aba1f9f0f5af00766c20b4e3383436f24f1f0188fc72

SHA512
ff6bb8a115726e54d60d5b4b27ee358601ee96f3c2168f19db67e96d71c5fd563d57a2c70c78da79dc9d7d09c1ece645548bc5acafc8e50045dfba9fdc528b8e

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

Filesize
11KB

MD5
7235d8195a01b40e76682dc285f8ab21

SHA1
b8340dd133116f938f6a38c3ba6cfa5fc4c790d0

SHA256
f2090230c2c3ae208cb137ec72bea7536a598a9a20751b68451cb7412b60c1ea

SHA512
e3a084aa256b72d3696bfbc9720bb15ef165ed79a543dd168eadb4b38b8b760fe85b7a36ba0b589c712f8d6ad2f1db82a61e2e6046f099d4e7a93dae791dcce6

Download Submit
memory/2240-1-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2240-4-0x0000000000030000-0x000000000003F000-memory.dmp

Filesize
60KB

Download
memory/2240-10-0x0000000000030000-0x000000000003F000-memory.dmp

Filesize
60KB

Download
memory/2240-20-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/2492-12-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download