320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36

Analysis

max time kernel
117s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/04/2024, 20:29

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General

Target

320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36.exe
Size

369KB
MD5

040a642a80d04a131480fbc8d8c3ff69
SHA1

cefbc4c6962b002bf9e0d61ee5822f958fcb4c22
SHA256

320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36
SHA512

85842dee9f94443db4404f50adcd278c2a7b14425a117b01dd89758c885519ac823b1dc59f1b38837a524766f796f724cbf4096831f9022e40dd819d31a2f0c0
SSDEEP

6144:+BAyrRjCF2As3aK/C5YzPaF+921eiVrl1fo0As4KpxxbxDxxxx155nZxs1UoKg:aPgX5CSF97Wts4KxxbxDxxxx15VZxq

Score

9^/10

persistence upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral1/memory/3036-0-0x0000000000400000-0x000000000045E000-memory.dmp	UPX
behavioral1/files/0x000c000000014c67-5.dat	UPX

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
2628	tbckyxk.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3036-0-0x0000000000400000-0x000000000045E000-memory.dmp	upx
behavioral1/files/0x000c000000014c67-5.dat	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\PROGRA~3\Mozilla\tbckyxk.exe	320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36.exe
File created	C:\PROGRA~3\Mozilla\newtrln.dll	tbckyxk.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
3036	320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36.exe
2628	tbckyxk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2628	3032	taskeng.exe	29
PID 3032 wrote to memory of 2628	3032	taskeng.exe	29
PID 3032 wrote to memory of 2628	3032	taskeng.exe	29
PID 3032 wrote to memory of 2628	3032	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36.exe
"C:\Users\Admin\AppData\Local\Temp\320955b049772d37161b5eb60f7587fe13f3bb83f61a784feab7dae89a17fc36.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of UnmapMainImage
PID:3036

C:\Windows\system32\taskeng.exe
taskeng.exe {01B8517F-3D70-4950-ACF4-876AA5FA284B} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:3032
- C:\PROGRA~3\Mozilla\tbckyxk.exe
  C:\PROGRA~3\Mozilla\tbckyxk.exe -gqpcbye
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of UnmapMainImage
  PID:2628

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:\PROGRA~3\Mozilla\tbckyxk.exe

Filesize
369KB

MD5
b01b1bfbf1438e8d8af70a9248ad5566

SHA1
144d9a21ed0dd0d7ee0d09d2e63686bbbd7fdeae

SHA256
3179ec0d64a664a35136403b9faf7ce1a6bdf9b028780a04418ffd198b133e4f

SHA512
7f4a862b236b2717a2fa66371d8bbfe0f6576f4601f3a5dde9dbd00250fe077b9ec01d6a11ce31b1fd17f6a0c2ccdcd1ff2d806a60010f569b39d444594218d6

Download Submit
memory/2628-7-0x0000000000460000-0x00000000004BB000-memory.dmp

Filesize
364KB

Download
memory/2628-8-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2628-10-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/3036-0-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/3036-1-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/3036-2-0x0000000001BF0000-0x0000000001C4B000-memory.dmp

Filesize
364KB

Download
memory/3036-4-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download