f5b476806e14d4194b343ff21df31ac1bb9b0aa07179911412dfee95123da72f

Analysis

max time kernel
12s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
08/01/2024, 14:50

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General

Target

4bb97f5ee1796e08cb8629b6c80ae993.exe
Size

10KB
MD5

4bb97f5ee1796e08cb8629b6c80ae993
SHA1

1e91821c5ad818e478e72ff0941f5ebed14be0f8
SHA256

f5b476806e14d4194b343ff21df31ac1bb9b0aa07179911412dfee95123da72f
SHA512

b10d93162bf94a695120243246b6a5b1331bdd1913e1e461179a567dcf8b2efe5ff9066b41d575a89caab3820ed2b4c66088fb7876c62a8102ac741d51978973
SSDEEP

192:Ry6qv+F7pQtH5dWVJLD9popPzvKx1jRN6TDzi/6DGLdtYecLbf+OHTTFZ:ITg7pQtHDYLD0p2n+DO/I6YVbjzr

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
2392	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1760	comboausk.exe

Loads dropped DLL 2 IoCs

pid	Process
1716	4bb97f5ee1796e08cb8629b6c80ae993.exe
1716	4bb97f5ee1796e08cb8629b6c80ae993.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1716-1-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/1716-4-0x0000000000030000-0x000000000003E000-memory.dmp	upx
behavioral1/memory/1760-12-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c000000013a83-9.dat	upx
behavioral1/files/0x000c000000013a83-3.dat	upx
behavioral1/memory/1716-20-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\comboaus.dll	4bb97f5ee1796e08cb8629b6c80ae993.exe
File created	C:\Windows\SysWOW64\comboausk.exe	4bb97f5ee1796e08cb8629b6c80ae993.exe
File opened for modification	C:\Windows\SysWOW64\comboausk.exe	4bb97f5ee1796e08cb8629b6c80ae993.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1716	4bb97f5ee1796e08cb8629b6c80ae993.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 1760	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	28
PID 1716 wrote to memory of 1760	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	28
PID 1716 wrote to memory of 1760	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	28
PID 1716 wrote to memory of 1760	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	28
PID 1716 wrote to memory of 2392	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	30
PID 1716 wrote to memory of 2392	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	30
PID 1716 wrote to memory of 2392	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	30
PID 1716 wrote to memory of 2392	1716	4bb97f5ee1796e08cb8629b6c80ae993.exe	30

C:\Users\Admin\AppData\Local\Temp\4bb97f5ee1796e08cb8629b6c80ae993.exe
"C:\Users\Admin\AppData\Local\Temp\4bb97f5ee1796e08cb8629b6c80ae993.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\SysWOW64\comboausk.exe
  C:\Windows\system32\comboausk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:1760
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\4bb97f5ee1796e08cb8629b6c80ae993.exe.bat
  2⤵
  - Deletes itself
  PID:2392

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

\Windows\SysWOW64\comboausk.exe

Filesize
10KB

MD5
4bb97f5ee1796e08cb8629b6c80ae993

SHA1
1e91821c5ad818e478e72ff0941f5ebed14be0f8

SHA256
f5b476806e14d4194b343ff21df31ac1bb9b0aa07179911412dfee95123da72f

SHA512
b10d93162bf94a695120243246b6a5b1331bdd1913e1e461179a567dcf8b2efe5ff9066b41d575a89caab3820ed2b4c66088fb7876c62a8102ac741d51978973

Download Submit
memory/1716-1-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1716-4-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/1716-11-0x0000000000030000-0x000000000003E000-memory.dmp

Filesize
56KB

Download
memory/1716-20-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1760-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download