e54d7b6b9f1cc61d59519d5cac352c798158f63f834b663a035198a1e6685a8b

Analysis

max time kernel
118s
max time network
129s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 19:46

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General

Target

chrome_100_percent.pak
Size

163KB
MD5

4fc6564b727baa5fecf6bf3f6116cc64
SHA1

6ced7b16dc1abe862820dfe25f4fe7ead1d3f518
SHA256

b7805392bfce11118165e3a4e747ac0ca515e4e0ceadab356d685575f6aa45fb
SHA512

fa7eab7c9b67208bd076b2cbda575b5cc16a81f59cc9bba9512a0e85af97e2f3adebc543d0d847d348d513b9c7e8bef375ab2fef662387d87c82b296d76dffa2
SSDEEP

3072:IOzwJCGIekwdLpsXYFAXg6IL2o418Gb0+VRLf0ld0GY3cQ3ERVm2I:IOzw1Iekam5QpK18Gb0OV8ld0GecQ3Ey

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\.pak	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\.pak\ = "pak_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_CLASSES\pak_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2948	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2948	AcroRd32.exe
2948	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2632	1928	cmd.exe	29
PID 1928 wrote to memory of 2632	1928	cmd.exe	29
PID 1928 wrote to memory of 2632	1928	cmd.exe	29
PID 2632 wrote to memory of 2948	2632	rundll32.exe	30
PID 2632 wrote to memory of 2948	2632	rundll32.exe	30
PID 2632 wrote to memory of 2948	2632	rundll32.exe	30
PID 2632 wrote to memory of 2948	2632	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak
1⤵
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2632
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\chrome_100_percent.pak"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
cf03d37bc78378fd29bd77eb78ae6c83

SHA1
f30af6f2f334b1de49aab994c65ca01245801044

SHA256
952a203c3599033d6f4455d3418c08fbda5f0e7c7b5c6b2c769711a54d0a8b2e

SHA512
b8e6a103dfc6a12869db5440cac1a3978b60b9fea3acd1340e7193b3ef574856ae7d2f87d26b477b7e8d9ed8e8158cd86a7bdce01ad0dcef0332a73b3d47e0e9

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