8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
12-03-2024 22:48

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General

Target

8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356.exe
Size

377KB
MD5

27be19895ccb4c6e74f5835f3a2075f6
SHA1

ca8b7cc4741387130059c498c9f751e4dc338d78
SHA256

8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356
SHA512

89ed259ce4995057bbc935b38201535f19afb5e493593e491868da9c3e168210d338fedb00efb8ec91f25fa6b41c0cb05e9aa2671455ff9379d5b9405f24c047
SSDEEP

6144:G72k0YujF59B+SNiT1SRws339pnPJ7ImcvKoSYxTg:0FxujX9B+lAb9ImhoSmTg

Score

9^/10

persistence upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2268-0-0x0000000000400000-0x000000000045F000-memory.dmp	UPX
behavioral1/files/0x000c000000014890-5.dat	UPX
behavioral1/memory/2936-7-0x0000000000400000-0x000000000045F000-memory.dmp	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
2936	wrvdfyg.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2268-0-0x0000000000400000-0x000000000045F000-memory.dmp	upx
behavioral1/files/0x000c000000014890-5.dat	upx
behavioral1/memory/2936-7-0x0000000000400000-0x000000000045F000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\PROGRA~3\Mozilla\wrvdfyg.exe	8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356.exe
File created	C:\PROGRA~3\Mozilla\klztrnd.dll	wrvdfyg.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2268	8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356.exe
2936	wrvdfyg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2936	2976	taskeng.exe	29
PID 2976 wrote to memory of 2936	2976	taskeng.exe	29
PID 2976 wrote to memory of 2936	2976	taskeng.exe	29
PID 2976 wrote to memory of 2936	2976	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356.exe
"C:\Users\Admin\AppData\Local\Temp\8edb7497f0524af271d09084ab8bff442866aff224c32826f2bb33d869f03356.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of UnmapMainImage
PID:2268

C:\Windows\system32\taskeng.exe
taskeng.exe {0BBEF844-45EC-4561-8EF4-A6ECDEB32827} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2976
- C:\PROGRA~3\Mozilla\wrvdfyg.exe
  C:\PROGRA~3\Mozilla\wrvdfyg.exe -hzyjzia
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of UnmapMainImage
  PID:2936

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\wrvdfyg.exe

Filesize
377KB

MD5
55c62f34063fb7f767ae7a9e669f0fdb

SHA1
d76bc53975022ac221e11a5d168ac690de9b84f8

SHA256
c16b297f8fbee30d1d61e491b3fb6f785e894ce703c13e3ecd64e9825690b75f

SHA512
5beb99c3b3cc1f6c3d3c5e7dffd7098102ea3652793a1fe72fc43315b68b2144709ec583fbd48ddb59da7e3caf1a0142d48efe7a289f0801612ddd2cf96116b3

Download Submit
memory/2268-0-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2268-2-0x0000000000270000-0x00000000002CB000-memory.dmp

Filesize
364KB

Download
memory/2268-1-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2268-4-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2936-7-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2936-8-0x0000000000520000-0x000000000057B000-memory.dmp

Filesize
364KB

Download
memory/2936-9-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/2936-11-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download