11f8bd1484d0adeed4997fc6b593e38f59ee365939924fd0fffc3ee92e0e73da

Analysis

max time kernel
171s
max time network
36s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
18/12/2022, 18:06

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General

Target

Fluent-for-Steam-0.4.4.2fix/friends/friendinvitationnotification.res
Size

2KB
MD5

1f6d805248fa43e2eb0fb383876fe171
SHA1

51342032b7e5cad647553f67ec2e08d7b9653f1e
SHA256

aee57672376990f43a7d675995797e0e67b9855c5bd7fde2fe2b157576617833
SHA512

cad6e6e8ed4889ba174d31cc6a1ed1e4006bfee757225ae1a13edf4b4273146af2613e134fb0da6dbdd5b8e68aad9c0b8df0caf7eff28808b6d5a6bc501db73f

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.res	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.res\ = "res_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\res_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1912	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1912	AcroRd32.exe
1912	AcroRd32.exe
1912	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 1680	1148	cmd.exe	29
PID 1148 wrote to memory of 1680	1148	cmd.exe	29
PID 1148 wrote to memory of 1680	1148	cmd.exe	29
PID 1680 wrote to memory of 1912	1680	rundll32.exe	30
PID 1680 wrote to memory of 1912	1680	rundll32.exe	30
PID 1680 wrote to memory of 1912	1680	rundll32.exe	30
PID 1680 wrote to memory of 1912	1680	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Fluent-for-Steam-0.4.4.2fix\friends\friendinvitationnotification.res
1⤵
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Fluent-for-Steam-0.4.4.2fix\friends\friendinvitationnotification.res
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1680
- - 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\Fluent-for-Steam-0.4.4.2fix\friends\friendinvitationnotification.res"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1912

Network

MITRE ATT&CK Enterprise v6

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

memory/1148-54-0x000007FEFB5B1000-0x000007FEFB5B3000-memory.dmp

Filesize
8KB

Download
memory/1912-82-0x0000000075A91000-0x0000000075A93000-memory.dmp

Filesize
8KB

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