MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5
SHA3-384 hash: bf6cb7b6e16fc87b2e6ddc6ac2a5e12a40d79793d06472804b9e9a72adecea509f008fbc25fb7717f5e66791d86afcd7
SHA1 hash: ec44d212bc9bb9e5efba361a12479db455a34eb5
MD5 hash: 82fdb6200333049bef2def43678680c0
humanhash: july-aspen-mirror-fifteen
File name:Transaccions DOC-REF DX739475.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:343'840 bytes
First seen:2022-10-23 04:47:42 UTC
Last seen:2022-10-23 06:13:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (530 x GuLoader, 110 x RemcosRAT, 80 x EpsilonStealer)
ssdeep 6144:kVGdx6x1TWYMNOGYDlbpBHMtEWDqrunaqhexSHgGzA49BLkywwLxlkwJIfG:4nFMNOG87lu/DqeakdAI3Qxwll5Ie
TLSH T1D97412916A44E83BC6EB43B055BD62B75F3AC72534886F4A07A45D88BD237F0A11F393
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon d183a4a49ec65033 (1 x Formbook, 1 x GuLoader)
Reporter GovCERT_CH
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-06-30T15:01:29Z
Valid to:2025-06-29T15:01:29Z
Serial number: -29be377745ebd01f
Thumbprint Algorithm:SHA256
Thumbprint: d999be55f2c518bc7691b99f0147d3b8a88a5c97428eb45cf7ed6f9b9c519263
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
272
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
Transaccions DOC-REF DX739475.rar
Verdict:
Malicious activity
Analysis date:
2022-10-18 13:09:39 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/8dd7b154-d222-4d88-af9c-eba21c709261

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/322866/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.62904507.7896.8216.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/44613/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6354c785b5f60e72b8c7dfe9/reports/8c27c13e-4063-4da5-8ad8-7ef92e9ca512/overview
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/2d8ebeed-75ae-4c2a-83bf-630b63e8c379
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1095764
Signature
C2 URLs / IPs found in malware configuration
Hides threads from debuggers
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 harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 728404 Sample: Transaccions DOC-REF DX739475.exe Startdate: 23/10/2022 Architecture: WINDOWS Score: 100 33 www.vip617.com 2->33 35 www.vidsb.online 2->35 37 24 other IPs or domains 2->37 49 Snort IDS alert for network traffic 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 4 other signatures 2->55 10 Transaccions DOC-REF DX739475.exe 7 46 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 10->29 dropped 31 C:\Users\user\AppData\...\glibmm-2.4.dll, PE32+ 10->31 dropped 67 Tries to detect Any.run 10->67 69 Hides threads from debuggers 10->69 14 Transaccions DOC-REF DX739475.exe 6 10->14         started        signatures6 process7 dnsIp8 45 drive.google.com 142.250.184.206, 443, 49849 GOOGLEUS United States 14->45 47 googlehosted.l.googleusercontent.com 142.250.186.129, 443, 49850 GOOGLEUS United States 14->47 71 Modifies the context of a thread in another process (thread injection) 14->71 73 Tries to detect Any.run 14->73 75 Maps a DLL or memory area into another process 14->75 77 3 other signatures 14->77 18 RAVCpl64.exe 14->18 injected signatures9 process10 process11 20 rundll32.exe 13 18->20         started        signatures12 57 Tries to steal Mail credentials (via file / registry access) 20->57 59 Tries to harvest and steal browser information (history, passwords, etc) 20->59 61 Writes to foreign memory regions 20->61 63 3 other signatures 20->63 23 explorer.exe 1 1 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 39 travelhotelsgate.com 162.241.169.11, 49903, 49904, 49905 UNIFIEDLAYER-AS-1US United States 23->39 41 deepakknair.com 104.249.63.34, 49958, 49959, 49960 TIER-NETUS United States 23->41 43 13 other IPs or domains 23->43 65 System process connects to network (likely due to code injection or exploit) 23->65 signatures15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2022-10-18 07:34:51 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
19 of 26 (73.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w2eyqvthwh4kfg5p5x7v7ruvezjuomxlw5zr3gf3ybxxabnsixkq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cloudeye
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:gbww discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/221023-fe4ycagegn/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
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
Reads user/profile data of web browsers
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/1a29bb9b-baff-41bc-8f9a-36d1f8ad082b
Unpacked files
SH256 hash:
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
MD5 hash:
75ed96254fbf894e42058062b4b4f0d1
SHA1 hash:
996503f1383b49021eb3427bc28d13b5bbd11977
Link:
https://www.unpac.me/results/451f73ce-c9f4-45fb-8f07-a9f7a2380a6c/
SH256 hash:
b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5
MD5 hash:
82fdb6200333049bef2def43678680c0
SHA1 hash:
ec44d212bc9bb9e5efba361a12479db455a34eb5
Link:
https://www.unpac.me/results/451f73ce-c9f4-45fb-8f07-a9f7a2380a6c/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5

File information

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

Malspam

GuLoader

Executable exe b689885667b1f8a29bafedff5fc69526534732ebb7731d98bbc06f7005b245d5

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/322866/

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