MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d. 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


GuLoader


Vendor detections: 12


Intelligence 12 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d
SHA3-384 hash: fd5b415bb544342a08237170d12f810a32ba384002a2566920a2263f960a072be71ea4e1c82b0ae553ee2c983e73116b
SHA1 hash: 0499cd6987405cc866192248968710c7941e4bd7
MD5 hash: 51624c20a67368392552d7b684bec666
humanhash: kentucky-india-floor-sixteen
File name:doleful.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:821'144 bytes
First seen:2023-07-31 09:14:01 UTC
Last seen:2023-07-31 12:47:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 1f23f452093b5c1ff091a2f9fb4fa3e9 (276 x GuLoader, 37 x RemcosRAT, 23 x AgentTesla)
ssdeep 24576:/bAzYURs5I5ygSShLbW2P5ei1fL1YkoRDjqBxl:AmSh5PE0fpYkocBxl
Threatray 672 similar samples on MalwareBazaar
TLSH T1B00523582593E437DA070FF08A7D6D394719C28587719B173B42899C7E6AF248F1B38B
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-03-08T01:03:25Z
Valid to:2026-03-07T01:03:25Z
Serial number: 73b25a37055114fa9a8b3c8203e1baa5e5e948bd
Thumbprint Algorithm:SHA256
Thumbprint: d23def5bc059326ac48bd769d1d95f23d81ebf4db12e1713e37d0496b221698a
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
300
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
doleful.exe
Verdict:
Malicious activity
Analysis date:
2023-07-31 09:15:19 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/ba1c157f-cdf6-4a7c-8ddc-a717b789ab12

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/439389/
Detection(s):
SecuriteInfo.com.FileRepMalware.9458.1766.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a file
Delayed reading of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/64c77b5b1b48787a4970acce/reports/61a29643-7a1b-4973-b58b-ed4393e86620/overview
Verdict:
Malicious
Labled as:
Trojan/NSIS.XG41
Link:
https://www.hybrid-analysis.com/sample/d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9f980813-756b-4512-bbb4-fa8539fc02ef
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1283053
Signature
Antivirus detection for URL or domain
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses ipconfig to lookup or modify the Windows network settings
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1283053 Sample: doleful.exe Startdate: 31/07/2023 Architecture: WINDOWS Score: 100 32 www.weinbrenner-stiftung.org 2->32 34 www.vusujhyf.click 2->34 36 27 other IPs or domains 2->36 50 Snort IDS alert for network traffic 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus detection for URL or domain 2->54 56 6 other signatures 2->56 10 doleful.exe 4 30 2->10         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\...\System.dll, PE32 10->30 dropped 68 Tries to detect Any.run 10->68 14 doleful.exe 6 10->14         started        signatures6 process7 dnsIp8 44 googlehosted.l.googleusercontent.com 142.250.186.33, 443, 49948 GOOGLEUS United States 14->44 46 drive.google.com 172.217.18.110, 443, 49947 GOOGLEUS United States 14->46 70 Modifies the context of a thread in another process (thread injection) 14->70 72 Tries to detect Any.run 14->72 74 Maps a DLL or memory area into another process 14->74 76 Queues an APC in another process (thread injection) 14->76 18 RAVCpl64.exe 14->18 injected signatures9 process10 signatures11 48 Sample uses process hollowing technique 18->48 21 ipconfig.exe 13 18->21         started        process12 signatures13 58 Tries to steal Mail credentials (via file / registry access) 21->58 60 Tries to harvest and steal browser information (history, passwords, etc) 21->60 62 Writes to foreign memory regions 21->62 64 3 other signatures 21->64 24 explorer.exe 2 1 21->24 injected 28 firefox.exe 21->28         started        process14 dnsIp15 38 triplemshipssupplies.com 173.254.104.74, 49989, 49990, 49991 UNIFIEDLAYER-AS-1US United States 24->38 40 www.595qdd.top 91.195.240.123, 49964, 49965, 49966 SEDO-ASDE Germany 24->40 42 16 other IPs or domains 24->42 66 System process connects to network (likely due to code injection or exploit) 24->66 signatures16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-07-31 09:15:05 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
16 of 21 (76.19%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2idmzrbzpxuaao2hodlh5kbrlzgzs72rtruuwdi7bjmuke4je56q._file
Verdict:
unknown
Similar samples:
3e924b372c019c41e9995a276ce5c1b1487d14ceb9fbc8d606a09a83df5989b8
GuLoader
478e966f1f7aa4d1479c58f0736b4355cd04d2b10c088700e89eb016da7136c5
GuLoader
74c460852f392fbdd2ef8d83d9461371228d37fba88a6431fd205ee20bccf622
GuLoader
7a55e4b3f800275bc0f7c00cd337d0dd83379ef845fce3fa55b86d68092c1b9c
GuLoader
8634539aeebcb5bebb6a3a87cd7e7ff3d1930fed304276392cdd38d39361b89b
GuLoader
bf3b3dbdeec58b9b018269cb0881f25708c1b0f0db5ed19228645e7e9ef00563
GuLoader
c0303022c1e2e014df91a6ff93d540d2e734a938f93e16649941c418d54e5a62
GuLoader
c36591c7c0ef136b66dcf2955035ffc43ccd7fa6d6ce8c65f747dbe0aff7814e
GuLoader
c912574d97fc69697687cc5f38f0d6ca750c58a11227f442fde822160240534c
GuLoader
d7750235007c0d35353219bebab9ccb181f7e1d019c265e441a734b19c88dc69
GuLoader
+ 662 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/230731-k7cf1sdh39/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks installed software on the system
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Checks computer location settings
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
MD5 hash:
75ed96254fbf894e42058062b4b4f0d1
SHA1 hash:
996503f1383b49021eb3427bc28d13b5bbd11977
Link:
https://www.unpac.me/results/759b08a9-c90c-4f4a-b5c5-8dce0dd4cc0f/
SH256 hash:
d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d
MD5 hash:
51624c20a67368392552d7b684bec666
SHA1 hash:
0499cd6987405cc866192248968710c7941e4bd7
Link:
https://www.unpac.me/results/759b08a9-c90c-4f4a-b5c5-8dce0dd4cc0f/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d206ccc4397d/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d

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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

GuLoader

Executable exe d206ccc4397de8003b4770d67ea8315e4d997f519c694b0d1f0a59451389277d

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/439389/

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