1cbdbc2553018d5afbfe7dc7755f54462660a48c6774389e3ee899ead9926f1e

Analysis

max time kernel
119s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19/01/2024, 10:05

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General

Target

com/appsflyer/share/CrossPromotionHelper.class
Size

3KB
MD5

b20e6bb224759e30e8c6d06a116c3c96
SHA1

9662448b96d1d5e94958f396c1d6a579ca8a3b7a
SHA256

076dd0d14ce275aac554ebd42faec5d91f2c66144577fd374a0816297cc52423
SHA512

78f06dcc3205c6c27e4846490ab23f3dc9c8576195b4b5752bf60ee0e9bdcf08b9df8bc25507678cde3c684620aee3f9ee4e1a76a7d4f7e847c627a90f5b7423

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
Set value (str)	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\.class	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000_CLASSES\class_auto_file	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2032	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2032	AcroRd32.exe
2032	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 2792	2064	cmd.exe	29
PID 2064 wrote to memory of 2792	2064	cmd.exe	29
PID 2064 wrote to memory of 2792	2064	cmd.exe	29
PID 2792 wrote to memory of 2032	2792	rundll32.exe	30
PID 2792 wrote to memory of 2032	2792	rundll32.exe	30
PID 2792 wrote to memory of 2032	2792	rundll32.exe	30
PID 2792 wrote to memory of 2032	2792	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\com\appsflyer\share\CrossPromotionHelper.class
1⤵
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\com\appsflyer\share\CrossPromotionHelper.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2792
- - 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\com\appsflyer\share\CrossPromotionHelper.class"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2032

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

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Downloads

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

Filesize
3KB

MD5
63da31cd6f0ae4da041836773ce114fb

SHA1
3b2d3c2d076fd5c2ef9afe99a6ee4f10f9fe8b66

SHA256
34a1b574764d8f7536ca0f8d4468bc9e6c4a6208dd2602caea7187290d3d50ec

SHA512
3d264cda4ef69d85382046384d54450ae3f56ccaef6799d8d571f43b678d9c6db63575ea857565d0f42098114608583ed7e1dd46321361c2599033a1509a563a

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