3c2c9e49a102d40894fc3bbf3da6b6a0eaf61f4ab092fac626cc97e6ea467155

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
21/07/2023, 03:49

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General

Target

5555.bms
Size

2KB
MD5

7a0fdfb962f4da7eeb89d04974d6421a
SHA1

4520fbf8042ab18c3968e3dafd90356fddd511ed
SHA256

d701965f1d1775a36f2a67e9a125ea6249c607ec2c9c501bbf824d4b44b668b7
SHA512

5b861601901a51c5822f876866669525b36a7cadd9829557748fe52ee264c074af4ef0661f1973e92a54c9522b72200afc9ab98bc335194962b118946ba87c3d

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-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\.bms	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\.bms\ = "bms_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000_CLASSES\bms_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2952	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2952	AcroRd32.exe
2952	AcroRd32.exe
2952	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 2948	1260	cmd.exe	29
PID 1260 wrote to memory of 2948	1260	cmd.exe	29
PID 1260 wrote to memory of 2948	1260	cmd.exe	29
PID 2948 wrote to memory of 2952	2948	rundll32.exe	30
PID 2948 wrote to memory of 2952	2948	rundll32.exe	30
PID 2948 wrote to memory of 2952	2948	rundll32.exe	30
PID 2948 wrote to memory of 2952	2948	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\5555.bms
1⤵
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\5555.bms
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2948
- - 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\5555.bms"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2952

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
33ab7cefc0b58d56c024a713da2cea00

SHA1
ea61a62ab6b7232fcca20a601606b204ec6e5e0a

SHA256
4119214dd9b3273bd5c8180e72059f2df8f0568c1402da08cea04d33b040a8b6

SHA512
d0fbbc1321aad4cceecdc9ff8bf61604c291e403e2e337a7f50088b4e06a4cbf174bb17f2774b84aaa715922c9e4ca7535aacfc66728f796b89e2c743b0dc5be

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