MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 31e1948d4e15f5eebeeb8c43d57ae0398b39d0edea908df6bcd6e032bbdb93e5. 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: 19
| SHA256 hash: | 31e1948d4e15f5eebeeb8c43d57ae0398b39d0edea908df6bcd6e032bbdb93e5 |
|---|---|
| SHA3-384 hash: | 890373fb94aa4ff3278629c8eb6ee0933820e69d98477caed8322f08f5ffca5c3f64f6bad6f172eebf178398da3dd6b5 |
| SHA1 hash: | 6f39725318a0787ee1d2a7f56e6d7b534108ec44 |
| MD5 hash: | 86eaf6459bb8f3da5e0f8c20eb4fcd9d |
| humanhash: | michigan-vermont-missouri-pennsylvania |
| File name: | dontrun.exe |
| Download: | download sample |
| Signature | Chaos |
| File size: | 21'504 bytes |
| First seen: | 2025-08-04 18:25:10 UTC |
| Last seen: | 2025-08-12 13:03:28 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'855 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger) |
| ssdeep | 384:X3MLWHn3kIEfu6TAMwBbpOBsBadkEJTr91CzYKeA:jn3kIYWbpZMTr9ixeA |
| Threatray | 277 similar samples on MalwareBazaar |
| TLSH | T1E3A20908B7FE9A39F6FE2F7C69B201504775B91BDD2ED74D2CCE40491C22B8C89506A5 |
| TrID | 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| Reporter |  AntiSkidding |
| Tags: | Chaos exe Ransomware |
Intelligence
File Origin
# of uploads :
2
# of downloads :
383
Origin country :
FRVendor Threat Intelligence
Malware family:
ryuk
ID:
1
File name:
dontrun.exe
Verdict:
Malicious activity
Analysis date:
2025-08-04 18:12:12 UTC
Tags:
auto-startup chaos ryuk ransomware crypto-regex
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Chaos
Detection(s):
Verdict:
Malicious
Score:
99.9%
Tags:
ransomware autorun dropper virus
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Changing a file
Creating a file in the %AppData% subdirectories
Launching a process
Creating a window
Сreating synchronization primitives
Unauthorized injection to a recently created process
Creating a file in the mass storage device
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-security base64 cmd lolbin ransomware ransomware reconnaissance wmic
Verdict:
Malicious
Labled as:
Ransom.Small.Generic
Malware family:
CHAOS Ransomware
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable PE (Portable Executable) SOS: 0.25 Win 32 Exe x86
Verdict:
Malicious
Threat:
Family.CHAOS
Threat name:
ByteCode-MSIL.Ransomware.Sorry
Status:
Malicious
First seen:
2025-08-04 18:12:12 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
36 of 38 (94.74%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
chaos
Similar samples:
+ 267 additional samples on MalwareBazaar
Result
Malware family:
chaos
Score:
10/10
Tags:
family:chaos ransomware spyware stealer
Behaviour
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
Drops desktop.ini file(s)
Checks computer location settings
Drops startup file
Executes dropped EXE
Reads user/profile data of web browsers
Chaos
Chaos Ransomware
Chaos family
Verdict:
Malicious
Tags:
ransomware chaos Win.Ransomware.Hydracrypt-9878672-0
YARA:
Destructive_Ransomware_Gen1 MALWARE_Win_Chaos
Unpacked files
SH256 hash:
31e1948d4e15f5eebeeb8c43d57ae0398b39d0edea908df6bcd6e032bbdb93e5
MD5 hash:
86eaf6459bb8f3da5e0f8c20eb4fcd9d
SHA1 hash:
6f39725318a0787ee1d2a7f56e6d7b534108ec44
Detections:
ChaosRansomware
Malware family:
Chaos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.77
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: | Destructive_Ransomware_Gen1 |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects destructive malware |
| Reference: | http://blog.talosintelligence.com/2018/02/olympic-destroyer.html |
| Rule name: | Destructive_Ransomware_Gen1_RID31CB |
|---|---|
| Author: | Florian Roth |
| Description: | Detects destructive malware |
| Reference: | http://blog.talosintelligence.com/2018/02/olympic-destroyer.html |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | INDICATOR_SUSPICIOUS_GENRansomware |
|---|---|
| Author: | ditekSHen |
| Description: | Detects command variations typically used by ransomware |
| Rule name: | MALWARE_Win_Chaos |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Chaos ransomware |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
BLint
The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.
Findings
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (HIGH_ENTROPY_VA) | high |
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