539fea9977fd379f54dc54c1a233f4080e50d7332db93e5a849b828918f0da57

Analysis

max time kernel
121s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2022, 15:17

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General

Target

MYFILE.lnk
Size

2KB
MD5

9e01da4e538784bc9e649f8f39f01187
SHA1

07d4f50a84c027187358a20dcc2f78b78b2b531e
SHA256

076dd53597d7464f38e16458d2a23225c7c8ccde3890de7c40e1f1a7c945ba92
SHA512

b397b46ce58946590ee5d0203f0d214d189994b030f387c84f262105fad788805f4d3e9a4807677cff88311f7014688cd348f7d581165affcd74599d9ae0a9fd

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2996	trink.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	cmd.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3404 wrote to memory of 368	3404	cmd.exe	82
PID 3404 wrote to memory of 368	3404	cmd.exe	82
PID 368 wrote to memory of 828	368	cmd.exe	84
PID 368 wrote to memory of 828	368	cmd.exe	84
PID 368 wrote to memory of 1392	368	cmd.exe	85
PID 368 wrote to memory of 1392	368	cmd.exe	85
PID 368 wrote to memory of 4520	368	cmd.exe	86
PID 368 wrote to memory of 4520	368	cmd.exe	86
PID 368 wrote to memory of 4888	368	cmd.exe	87
PID 368 wrote to memory of 4888	368	cmd.exe	87
PID 368 wrote to memory of 2996	368	cmd.exe	88
PID 368 wrote to memory of 2996	368	cmd.exe	88

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\MYFILE.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3404
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\trichromatic.cmd" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:368
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo f"
    3⤵
    PID:828
- - C:\Windows\system32\xcopy.exe
    xcopy C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\trink.exe /h /s /e
    3⤵
    PID:1392
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo f"
    3⤵
    PID:4520
- - C:\Windows\system32\xcopy.exe
    xcopy templates786.png C:\Users\Admin\AppData\Local\Temp\24728.1370 /h /s /e
    3⤵
    PID:4888
- - C:\Users\Admin\AppData\Local\Temp\trink.exe
    C:\Users\Admin\AppData\Local\Temp\trink.exe C:\Users\Admin\AppData\Local\Temp\24728.1370,#1
    3⤵
    - Executes dropped EXE
    PID:2996

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\trink.exe

Filesize
70KB

MD5
ef3179d498793bf4234f708d3be28633

SHA1
dd399ae46303343f9f0da189aee11c67bd868222

SHA256
b53f3c0cd32d7f20849850768da6431e5f876b7bfa61db0aa0700b02873393fa

SHA512
02aff154762d7e53e37754f878ce6aa3f4df5a1eb167e27f13d9762dced32bec892bfa3f3314e3c6dce5998f7d3c400d7d0314b9326eedcab72207c60b3d332e

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C:\Users\Admin\AppData\Local\Temp\trink.exe

Filesize
70KB

MD5
ef3179d498793bf4234f708d3be28633

SHA1
dd399ae46303343f9f0da189aee11c67bd868222

SHA256
b53f3c0cd32d7f20849850768da6431e5f876b7bfa61db0aa0700b02873393fa

SHA512
02aff154762d7e53e37754f878ce6aa3f4df5a1eb167e27f13d9762dced32bec892bfa3f3314e3c6dce5998f7d3c400d7d0314b9326eedcab72207c60b3d332e

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