0ecfa9e9370f383a669aad9db9a28109c24226496b519e7383713c7c1deaf861

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-03-2024 17:01

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General

Target

Chronos/.git/hooks/fsmonitor-watchman.sample
Size

4KB
MD5

a0b2633a2c8e97501610bd3f73da66fc
SHA1

0ec0ec9ac11111433d17ea79e0ae8cec650dcfa4
SHA256

e0549964e93897b519bd8e333c037e51fff0f88ba13e086a331592bf801fa1d0
SHA512

5168643c1768ec83554a9066754507a781b6d14251a46a469222d462efc6ca87a72c90679154e8a723349c91e7772b32ac9b08dfe313cded0ee0a6f17885079e
SSDEEP

96:GFCscBOvOFXDgRvi/3UCwN4ZlkRo/j5SpoNOBoi+geBIzCa:GFCsEOmWRa8CwN4ZqRo7geEk3IzCa

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

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\.sample	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\.sample\ = "sample_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3787592910-3720486031-2929222812-1000_CLASSES\sample_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2720 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2720 AcroRd32.exe
2720 AcroRd32.exe

pid	process
2720	AcroRd32.exe

pid	process
2720	AcroRd32.exe
2720	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 856 wrote to memory of 2764	856	cmd.exe	rundll32.exe
PID 856 wrote to memory of 2764	856	cmd.exe	rundll32.exe
PID 856 wrote to memory of 2764	856	cmd.exe	rundll32.exe
PID 2764 wrote to memory of 2720	2764	rundll32.exe	AcroRd32.exe
PID 2764 wrote to memory of 2720	2764	rundll32.exe	AcroRd32.exe
PID 2764 wrote to memory of 2720	2764	rundll32.exe	AcroRd32.exe
PID 2764 wrote to memory of 2720	2764	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Chronos\.git\hooks\fsmonitor-watchman.sample
1⤵
- Suspicious use of WriteProcessMemory
PID:856

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Chronos\.git\hooks\fsmonitor-watchman.sample
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2764

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\Chronos\.git\hooks\fsmonitor-watchman.sample"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2720

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
38029a1a6e937d916ddbd767a9e0b645

SHA1
8c51a77a626e82cbd72e86544d1116af3f3c9e88

SHA256
40472f20bcf2dba885d03ef0300c1336ac96ef0511ef2776f01a69eb6aeb36e4

SHA512
a10033cc72a6606f4b4a829f502ed28e5ff25053b84412ab0e137be18c300dcbf84437dd07772a3fe49465a43e5cfa1b5db6c05de809039ab16c83c7668d808a

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