MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 7ff02d597c1d6d81252edc66749f979c3f61b5e2ebd76ecbbec75859c21baf83. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
Chaos
Vendor detections: 12
| SHA256 hash: | 7ff02d597c1d6d81252edc66749f979c3f61b5e2ebd76ecbbec75859c21baf83 |
|---|---|
| SHA3-384 hash: | 8895575707a8cb73955360e4ff7413cb359f6593490232a70a48c79d64875053b25a46f81c7a4e5363860104914f5862 |
| SHA1 hash: | fb813e713df734f368163214506a52dbc364c954 |
| MD5 hash: | d619445e564a6e64fb88101a35675ef5 |
| humanhash: | lamp-fruit-mockingbird-mississippi |
| File name: | yashma-encrypt.exe |
| Download: | download sample |
| Signature | Chaos |
| File size: | 192'000 bytes |
| First seen: | 2022-04-22 18:32:41 UTC |
| Last seen: | 2022-04-23 05:16:22 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 3072:BPyiYB9qPDKsxGDVdBz9rfZ6zUhEeoDjMtVGZFhFdyjU7C8qWEcMK:YlB948Dv1pZ68EeoDjmG7xyEFM |
| Threatray | 1'654 similar samples on MalwareBazaar |
| TLSH | T1D3145B243EEB5019F3B3AF794BE4B5AECA6FB6733B06945D109103460623E41DD91B3A |
| TrID | 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.4% (.EXE) Win64 Executable (generic) (10523/12/4) 6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.4% (.EXE) Win32 Executable (generic) (4505/5/1) 2.0% (.EXE) OS/2 Executable (generic) (2029/13) |
| Reporter |  3xp0rtblog |
| Tags: | Chaos exe Ransomware Yashma |
Intelligence
File Origin
# of uploads :
2
# of downloads :
497
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
yashma-encrypt.exe
Verdict:
Malicious activity
Analysis date:
2022-04-22 16:55:11 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Chaos
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Sending a custom TCP request
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a process from a recently created file
Creating a file
Changing a file
Reading critical registry keys
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a window
Unauthorized injection to a recently created process
Stealing user critical data
Deleting volume shadow copies
Preventing system recovery
Enabling autorun by creating a file
Encrypting user's files
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
azorult cmd.exe control.exe cryptolocker filecoder hiddentear hydracrypt obfuscated packed ransomware replace.exe virus
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
CHAOS Ransomware
Verdict:
Malicious
Result
Threat name:
Chaos
Detection:
malicious
Classification:
rans.expl.evad
Score:
100 / 100
Signature
.NET source code contains very large strings
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to disable the Task Manager (.Net Source)
Deletes shadow drive data (may be related to ransomware)
Detected unpacking (overwrites its own PE header)
Drops PE files with benign system names
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Sigma detected: File Created with System Process Name
Sigma detected: Suspcious CLR Logs Creation
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
Writes a notice file (html or txt) to demand a ransom
Yara detected Chaos Ransomware
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Ransomware.HiddenTear
Status:
Malicious
First seen:
2022-04-22 18:33:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
22 of 26 (84.62%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
ryuk
Similar samples:
+ 1'644 additional samples on MalwareBazaar
Result
Malware family:
chaos
Score:
10/10
Tags:
family:chaos evasion ransomware spyware stealer
Behaviour
Checks SCSI registry key(s)
Interacts with shadow copies
Modifies registry class
Opens file in notepad (likely ransom note)
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Sets desktop wallpaper using registry
Drops desktop.ini file(s)
Checks computer location settings
Drops startup file
Reads user/profile data of web browsers
Deletes backup catalog
Disables Task Manager via registry modification
Executes dropped EXE
Modifies extensions of user files
Deletes shadow copies
Modifies boot configuration data using bcdedit
Chaos
Chaos Ransomware
Unpacked files
SH256 hash:
7ff02d597c1d6d81252edc66749f979c3f61b5e2ebd76ecbbec75859c21baf83
MD5 hash:
d619445e564a6e64fb88101a35675ef5
SHA1 hash:
fb813e713df734f368163214506a52dbc364c954
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | INDICATOR_KB_ID_Ransomware_Chaos |
|---|---|
| Author: | ditekShen |
| Description: | Detects files referencing identities associated with Chaos ransomware |
| Rule name: | INDICATOR_SUSPICIOUS_GENRansomware |
|---|---|
| Author: | ditekSHen |
| Description: | detects command variations typically used by ransomware |
| Rule name: | INDICATOR_SUSPICOUS_EXE_References_VEEAM |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables containing many references to VEEAM. Observed in ransomware |
| Rule name: | MALWARE_Win_Chaos |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Chaos ransomware |
| Rule name: | pe_imphash |
|---|
| Rule name: | Redline_Stealer_Monitor |
|---|---|
| Description: | Detects RedLine Stealer Variants |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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