MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 abcf6a515eb6107006e9ec109c7a7ac5b751b375e199f1d5ba0554e5f6b74ece. 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
Threat unknown
Vendor detections: 9
| SHA256 hash: | abcf6a515eb6107006e9ec109c7a7ac5b751b375e199f1d5ba0554e5f6b74ece |
|---|---|
| SHA3-384 hash: | f8061eb174002e78ecc918605891d6c5bd3eda3e8525373f1d76dc8128a38d62cab2a697a2a6f168331b7002bcf7f0e8 |
| SHA1 hash: | a04d40cf52099b9c50168200094fa676f9485848 |
| MD5 hash: | e4643d7db1b9be583712e7fecfff61fe |
| humanhash: | sweet-florida-london-south |
| File name: | 002964dd.exe |
| Download: | download sample |
| File size: | 162'304 bytes |
| First seen: | 2026-10-17 14:56:21 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/vnd.microsoft.portable-executable |
| imphash | 3a3895f9ab2d1d66085ae21e74110362 |
| ssdeep | 3072:5kXg9k806uFjW/EJ0+1uvMN2sSvPeIy1SU6YoEh:5UQ0S/8X1uvMNvS0SU6W |
| TLSH | T1C6F3291AB3A250FDC15BC1745AEB9372A533F82113206E7F03A5CF762E65D602F6D628 |
| TrID | 45.6% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 18.0% (.EXE) Win64 Executable (generic) (6522/11/2) 13.9% (.EXE) Win16 NE executable (generic) (5038/12/1) 5.6% (.ICL) Windows Icons Library (generic) (2059/9) 5.6% (.EXE) OS/2 Executable (generic) (2029/13) |
| Magika | pebin |
| Reporter |  KodaDr |
| Tags: | exe Loader Uacbypass |
KodaDr
SUBJECT: Malware Analysis Request (Trojan.Win64.UACBypass / Loader)SHA-256: abcf6a515eb6107006e9ec109c7a7ac5b751b375e199f1d5ba0554e5f6b74ece
1. SOURCE AND ATTACK VECTOR
The file was received via email (a phishing campaign requesting that the recipient execute the attachment).
2. STATIC CHARACTERISTICS (PE64)
- File type: PE32+ executable (console/GUI) x86-64, for MS Windows.
- Compiler: MinGW-w64 (GCC: (tdm64-1) 10.3.0), with static linking of libstdc++ and winpthreads.
- Manifest: requestedExecutionLevel level="asInvoker" (intended to suppress the standard UAC prompt upon startup).
- Compilation timestamp (TimeDateStamp): 0x6ABA9E91.
3. BEHAVIORAL ANALYSIS AND MALICIOUS LOGIC
The sample implements a classic UAC bypass chain (UAC Bypass Method #41 / ICMLuaUtil), incorporating a preliminary process environment manipulation technique (PEB Masquerading):
Step 1 (Binding to an interactive session):
Dynamically resolves the functions OpenWindowStationW, SetProcessWindowStation, OpenDesktopW, and SetThreadDesktop from user32.dll, and binds the process to "WinSta0\Default". Step 2 (Bypassing Windows Security Mechanisms / Process Masquerading):
To circumvent the trusted process check when invoking an elevated COM object, the malware:
- Locates the "explorer.exe" process on the system using obfuscated calls to `CreateToolhelp32Snapshot`, `Process32FirstW`, `Process32NextW`, and `QueryFullProcessImageNameW`.
- Accesses its own process's PEB (Process Environment Block) structure directly (via the `gs:[0x60]` register), calls `RtlAcquirePebLock` (from `ntdll.dll`), overwrites the `ImagePathName` and `CommandLine` fields within the `RTL_USER_PROCESS_PARAMETERS` structure with the path to the system's "C:\Windows\explorer.exe", and subsequently calls `RtlReleasePebLock`.
Step 3 (Exploiting UAC Bypass via COM Moniker):
The malware decrypts the following moniker string in memory:
"Elevation:Administrator!new:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}" (CLSID CMSTPLUA)
and invokes `CoGetObject` using the `IID_ICMLuaUtil` interface (`{6EDD6D74-C007-4E75-B76A-E5740995E24C}`). Through the `ShellExec` virtual table method (at offset `0x48`), it relaunches itself—or an argument provided via the command line—with full Administrator privileges (High Integrity) without triggering a UAC prompt. 4. CRYPTOGRAPHY / OBFUSCATION
All sensitive strings and imported API names located in the .rdata section are encrypted using a custom stream algorithm:
plain[i] = ((i * 0xD7 + 0x29) & 0xFF) ^ cipher[i] ^ 0xA0 (where i starts at 1).
Decrypted IOCs (strings in memory):
- "Elevation:Administrator!new:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}"
- "RtlAcquirePebLock" / "RtlReleasePebLock"
- "ntdll.dll", "ole32.dll", "kernel32.dll", "advapi32.dll"
- "explorer.exe"
- "CoInitializeEx", "CoGetObject", "CoUninitialize"
- "CreateToolhelp32Snapshot", "Process32FirstW", "Process32NextW", "QueryFullProcessImageNameW"
- "CreateFileW", "DeleteFileW", "GetFileAttributesW", "ExpandEnvironmentStringsW", "GetWindowsDirectoryW", "TerminateProcess", "ReadFile", "WriteFile"
5. MITRE ATT&CK MATRIX MAPPING
- T1548.002: Abuse Elevation Control Mechanism: Bypass User Account Control (CMSTPLUA COM interface).
- T1036.004 / T1036.005: Masquerading (PEB ImagePathName spoofing as explorer.exe).
- T1027: Obfuscated Files or Information (Custom XOR-LCG string encryption).
- T1106: Native API (Direct PEB walk & dynamic API resolution).
Intelligence
File Origin
# of uploads :
1
# of downloads :
227
Origin country :
RUVendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-10-17 13:01:14 UTC
Tags:
auto-reg salatstealer stealer upx susp-powershell golang ms-smartcard
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
96.5%
Tags:
rozena
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating synchronization primitives
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug mingw packed
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Verdict:
Clean
File Type:
exe x64
First seen:
2026-10-11T16:51:00Z UTC
Last seen:
2026-10-19T04:38:00Z UTC
Hits:
~10
Verdict:
Unknown
Score:
96%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Threat name:
Win64.Trojan.Yomal
Status:
Malicious
First seen:
2026-10-10 00:19:48 UTC
File Type:
PE+ (Exe)
Extracted files:
1
AV detection:
10 of 24 (41.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Unpacked files
SH256 hash:
abcf6a515eb6107006e9ec109c7a7ac5b751b375e199f1d5ba0554e5f6b74ece
MD5 hash:
e4643d7db1b9be583712e7fecfff61fe
SHA1 hash:
a04d40cf52099b9c50168200094fa676f9485848
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | Check_OutputDebugStringA_iat |
|---|
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | SEH__vectored |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | ThreadControl__Context |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | VECT_Ransomware |
|---|---|
| Author: | Mustafa Bakhit |
| Description: | Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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