MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f. 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


Formbook


Vendor detections: 14


Intelligence 14 IOCs YARA 2 File information Comments
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SHA256 hash: a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f
SHA3-384 hash: e1b536be1f41f272774026fdf1351a0f9029598a1e807243b4ab263c7c6bb0e4aa4051233d262ae62756f1b1d8d70e03
SHA1 hash: 2cfeca6fd6d09dc182b68ff63e07394b255134a7
MD5 hash: d4387d08bd63a80fb6b4adf649a69353
humanhash: item-hydrogen-victor-alaska
File name:a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f
Download: download sample
Signature Formbook
Create hunting rule
File size:914'944 bytes
First seen:2023-01-06 13:14:30 UTC
Last seen:2023-01-06 14:29:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:8bFdELpCybniAU6NH80dox7lDQryH/vdUhA:SFdELpCybniAU62xEryH/Wh
Threatray 19'464 similar samples on MalwareBazaar
TLSH T17015060BAABC9910E6A1E1710B474ED700A1F70617A5EBC8625FFD32B0E86753764EC7
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
178
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f
Verdict:
Suspicious activity
Analysis date:
2023-01-06 13:17:57 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/cb51acf4-5818-4c6f-89c6-14c1754674f1

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/350063/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.64474017.20200.7304.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/63b81ed840e878e304232e09/reports/83d2df09-c03c-4236-a730-783b5e26728f/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.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4f146bea-cdd9-4c77-9920-2d90f90032ff
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1146315
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Deletes itself after installation
Machine Learning detection for sample
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 779047 Sample: IbOe6vyAev.exe Startdate: 06/01/2023 Architecture: WINDOWS Score: 100 30 www.vietnam-tourismonline.com 2->30 34 Malicious sample detected (through community Yara rule) 2->34 36 Antivirus detection for URL or domain 2->36 38 Multi AV Scanner detection for submitted file 2->38 40 7 other signatures 2->40 9 IbOe6vyAev.exe 3 2->9         started        signatures3 process4 file5 24 C:\Users\user\AppData\...\IbOe6vyAev.exe.log, ASCII 9->24 dropped 12 IbOe6vyAev.exe 9->12         started        15 IbOe6vyAev.exe 9->15         started        process6 signatures7 50 Modifies the context of a thread in another process (thread injection) 12->50 52 Maps a DLL or memory area into another process 12->52 54 Sample uses process hollowing technique 12->54 56 Queues an APC in another process (thread injection) 12->56 17 explorer.exe 12->17 injected process8 dnsIp9 26 www.rustfriebergh.com 46.30.211.38, 49696, 49697, 80 ONECOMDK Denmark 17->26 28 www.attracttitude.com 23.224.206.140, 49695, 80 CNSERVERSUS United States 17->28 32 System process connects to network (likely due to code injection or exploit) 17->32 21 explorer.exe 13 17->21         started        signatures10 process11 signatures12 42 Tries to steal Mail credentials (via file / registry access) 21->42 44 Tries to harvest and steal browser information (history, passwords, etc) 21->44 46 Deletes itself after installation 21->46 48 2 other signatures 21->48
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f/
Threat name:
Win32.Trojan.Leonem
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Status:
Malicious
First seen:
2022-12-23 09:27:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vay2uns3uoeb2gzr456ulo2upkftt7az4fvtgazztwxczs2sumpq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
03bdef1835627c2aff6b3c97d3e2096f95606c52769845304f1702c1bf62bc6a
Formbook
1b60de037862c81181d9068b63660bc31521b0f53a158bf62b05da36bfa92446
Formbook
26166c41b0a5364406a3c3f9c42d3f2bc3786aa5f32c71ee0675773bd7cc2125
Formbook
37372679b024d50d46f5c1dbe0c0e1de65ff4b97a8e3915d229982769c891a2b
Formbook
82dab0084009dd05a0beee74a261131edf8ebe11a9a4e3988ac37fe58656511b
Formbook
a02026fbb721304677f2b4d6f58d9171d5e411727f6b6c06a8a2ef1792f4c2a8
Formbook
cf7453c66634ec6525211464e5156835d5c3f1fd6392a82c1eb6a4775b002ba6
Formbook
d19f13bfd493ae42b92d07e6acd8f6b3717ac5c52efb874fc9fcb75170be729d
Formbook
dc18df47b5b99206344abe7dc551b531f134a14e7f8c3390fb419167ce435f01
Formbook
e69029315442a5ee81db93bf71e4e536cd0b2ca3124ea149d9ce2699fa6a0da1
Formbook
+ 19'454 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:asdo rat spyware stealer trojan
Link:
https://tria.ge/reports/230106-qg8pesgd67/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/bd2341d1-d1c8-4563-8ae1-8cf42713ca0f
Unpacked files
SH256 hash:
b5dc38c35d622e435dee068d64b68bc6893099b661cdcba799109a18d0ba8ceb
MD5 hash:
5f8a79f19072c6b5c7a2df3c8e963e1a
SHA1 hash:
2394cd16ae20e729925a1efbe68101817d3d58f5
Detections:
XLoader
Create hunting rule
win_formbook_auto
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win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
Parent samples :
a02026fbb721304677f2b4d6f58d9171d5e411727f6b6c06a8a2ef1792f4c2a8
082215d9272c7f706e6cc3b5f75abaa5e264566c1f6dec9fd0cd770d4bd86b4b
1fd55a441baa9459201847aa7aedb8262e45fac43f8f2f7fc09be53300c0f18b
26166c41b0a5364406a3c3f9c42d3f2bc3786aa5f32c71ee0675773bd7cc2125
a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f
SH256 hash:
305c2a1cd734e1ec7a9e86bc6294083b3b504f5ca11366dde63649695bd66c51
MD5 hash:
cd6c03f5dde8dcea5f361aeff1eeb2d8
SHA1 hash:
c55f8f77efc681ce5db7fe1723d3c0fed985638f
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
SH256 hash:
fc6485350cf55dc14ecbfd9b91b7a9979f61023b4104101e9f351caa6c73abaa
MD5 hash:
6c3fdb2b5d93cf814ea1b6ca05a0efcf
SHA1 hash:
f8ae5f9fa1c9b6b0e47b2f0873d2ee3373e0ebf5
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
SH256 hash:
7ac881ad7572d13a1d0f4d97c7fa44eefc9df2d1dd09bac3224e95f57b728ab3
MD5 hash:
3ad791756d36b95a1eb3ce5a724692fb
SHA1 hash:
5e765c6ced312798e8fb6338a4fab331cca3c3bd
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
SH256 hash:
fa1e3d42891ac889bd481fd9b0fa705cde91892098762088da123fa731be8ddf
MD5 hash:
2cd152dfe9e1fe38cb3d2f5117da30cd
SHA1 hash:
4320f572921b1d3b9909f0be66bcfcb41748497c
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
SH256 hash:
ab2f8dbc2b147528cecac6ea1a8886951c424be0b2026743b39d97f0cbabb04c
MD5 hash:
77ab42f4bbbf4565846eb8953192d71f
SHA1 hash:
3c662c756cc31867c0473716a74e777a65ced550
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
SH256 hash:
a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f
MD5 hash:
d4387d08bd63a80fb6b4adf649a69353
SHA1 hash:
2cfeca6fd6d09dc182b68ff63e07394b255134a7
Link:
https://www.unpac.me/results/4c59b61b-164d-4895-bd4a-4b3041761bcb/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a831aa365ba3/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/a831aa365ba3881d1b31e77d45bb547a8b39fc19e16b3303399dae2ccb52a31f

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_imphash
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/350063/

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