1cbdbc2553018d5afbfe7dc7755f54462660a48c6774389e3ee899ead9926f1e

Analysis

max time kernel
120s
max time network
126s
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$a.class
Size

2KB
MD5

41ed74addd2e0189360682b5ab5b21a9
SHA1

724fe27b21d3bac0951b9992dc205851f1dc209e
SHA256

e3c96f47c534d3c4ddba3137a9d9e53a6c0058357abcf50bfef19e6f8b32c868
SHA512

a8bc630d3fb7a201b10049207e312d444b42a37410e2ce6c0f26a90a9fbea02396b4f13673032759942e3a95779ddcaaa4fd320be1034dd6b861ba96a208becf

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-1-5-21-3601492379-692465709-652514833-1000_CLASSES\.class	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\class_auto_file\shell	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2832	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2832	AcroRd32.exe
2832	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 3020	1728	cmd.exe	29
PID 1728 wrote to memory of 3020	1728	cmd.exe	29
PID 1728 wrote to memory of 3020	1728	cmd.exe	29
PID 3020 wrote to memory of 2832	3020	rundll32.exe	30
PID 3020 wrote to memory of 2832	3020	rundll32.exe	30
PID 3020 wrote to memory of 2832	3020	rundll32.exe	30
PID 3020 wrote to memory of 2832	3020	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\com\appsflyer\share\CrossPromotionHelper$a.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\com\appsflyer\share\CrossPromotionHelper$a.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3020
- - 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$a.class"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2832

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
e29f65f0ca85ad1ba2c3a362c5f698aa

SHA1
3f5f8b65fd99baa5c0b299cfd287b2ca549849f6

SHA256
197fe0647f99648c89325028a218498ff3cc28ca638ad00db9c5fccb1ce8b8b7

SHA512
e5df058dd001600b1b407df21366e5b1147de736ca2bca1f50719b18a64efb1b1bbcca4d491dde0f55b9fbaa633d89dd076fde23c24b60ad27b9ca8a663a3d67

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