900dacd6f88860e144dd2d4db1772f2b9482c4682e3d5b1d01a630cd475f3151

Resubmissions

15-01-2023 20:32

230115-zbheqafh3x 1

15-01-2023 19:49

230115-yjne9sfd2s 3

Analysis

max time kernel
228s
max time network
199s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
15-01-2023 19:49

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General

Target

S.a3x.out
Size

1.2MB
MD5

0c1b07ed18b2429ed5a4a8dee7d8c69e
SHA1

50d5332b4a7169376e6ccd7d7893845aac5f8069
SHA256

150592ae82b3e9d0e0e73b03dd8e96de7ea08325465c90ab8503f86e70d01659
SHA512

45399874ac7f4e54aebde61e7ecfecdaacf196a79487ad00130a9ca02bdd898f31142a4185911836fbe8169c4ab8cabfb19a3234b69a471040e4755b43959fd5
SSDEEP

12288:nAJvsMuDs6ELI7gy1eCFJzuStaohcRCb9ZW4VcgY5cLEZYSe+X:AJvsDIrI3eMcShubYSl

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

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\out_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.out\ = "out_auto_file"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\out_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\out_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\out_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\out_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.out	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\out_auto_file\shell\Read	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1068 AcroRd32.exe
1068 AcroRd32.exe
1068 AcroRd32.exe

pid	process
1068	AcroRd32.exe
1068	AcroRd32.exe
1068	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 584 wrote to memory of 1164	584	cmd.exe	rundll32.exe
PID 584 wrote to memory of 1164	584	cmd.exe	rundll32.exe
PID 584 wrote to memory of 1164	584	cmd.exe	rundll32.exe
PID 1164 wrote to memory of 1068	1164	rundll32.exe	AcroRd32.exe
PID 1164 wrote to memory of 1068	1164	rundll32.exe	AcroRd32.exe
PID 1164 wrote to memory of 1068	1164	rundll32.exe	AcroRd32.exe
PID 1164 wrote to memory of 1068	1164	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\S.a3x.out
1⤵
- Suspicious use of WriteProcessMemory
PID:584

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\S.a3x.out
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1164

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\S.a3x.out"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1068

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/584-54-0x000007FEFBD41000-0x000007FEFBD43000-memory.dmp

Filesize
8KB

Download
memory/1068-81-0x0000000000000000-mapping.dmp

Download
memory/1068-82-0x0000000075BE1000-0x0000000075BE3000-memory.dmp

Filesize
8KB

Download
memory/1164-76-0x0000000000000000-mapping.dmp

Download