MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91
SHA3-384 hash: 94bd259ea8d72e0b824737ab0cffe91739978041d7a9a60e6044a7533f7c06673984682c98b434d8fdc99a276bff7516
SHA1 hash: 8689cd483e8cc3ff397004f993c567161c4d3c41
MD5 hash: 52322f04ee7e74ed0dee03b54dbb2b14
humanhash: arizona-red-potato-happy
File name:YNzE2QUkvaTK7kd.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:762'368 bytes
First seen:2021-04-12 08:02:43 UTC
Last seen:2021-04-12 08:56:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:dZ1swNjGqhG/8ZgxJXHeCFfNVTrXYXd1s1ts7DjgoBqerIeAl5kHbtbLwat91qRv:dFLG/8wX+GvYXd1s1ts7Djg0rIrkpbLI
Threatray 4'566 similar samples on MalwareBazaar
TLSH 98F4234D5368AB39F9BC67BD6434682007F5B10BD76BE7087CC8A0EE4D077418B91A76
Reporter GovCERT_CH
Tags:FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
123
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
YNzE2QUkvaTK7kd.exe
Verdict:
Malicious activity
Analysis date:
2021-04-12 08:05:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c5b868f3-0d15-406b-b7a2-a08e93742385

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/133696/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.645.14461.14838.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Sending a UDP request
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/672735
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 385317 Sample: YNzE2QUkvaTK7kd.exe Startdate: 12/04/2021 Architecture: WINDOWS Score: 100 41 www.lsertsex.com 2->41 49 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 10 other signatures 2->55 11 YNzE2QUkvaTK7kd.exe 7 2->11         started        signatures3 process4 file5 33 C:\Users\user\AppData\...\VVhTSSmjNa.exe, PE32 11->33 dropped 35 C:\Users\...\VVhTSSmjNa.exe:Zone.Identifier, ASCII 11->35 dropped 37 C:\Users\user\AppData\Local\Temp\tmp27F.tmp, XML 11->37 dropped 39 C:\Users\user\...\YNzE2QUkvaTK7kd.exe.log, ASCII 11->39 dropped 67 Uses schtasks.exe or at.exe to add and modify task schedules 11->67 69 Writes to foreign memory regions 11->69 71 Allocates memory in foreign processes 11->71 73 Injects a PE file into a foreign processes 11->73 15 RegSvcs.exe 11->15         started        18 schtasks.exe 1 11->18         started        signatures6 process7 signatures8 75 Modifies the context of a thread in another process (thread injection) 15->75 77 Maps a DLL or memory area into another process 15->77 79 Sample uses process hollowing technique 15->79 81 2 other signatures 15->81 20 explorer.exe 15->20 injected 24 conhost.exe 18->24         started        process9 dnsIp10 43 www.realsults.com 154.203.184.76, 49746, 80 HKMTC-AS-APHONGKONGMegalayerTechnologyCoLimitedHK Seychelles 20->43 45 www.wfiboostrs.com 172.67.148.14, 49757, 80 CLOUDFLARENETUS United States 20->45 47 192.168.2.1 unknown unknown 20->47 57 System process connects to network (likely due to code injection or exploit) 20->57 59 Uses ipconfig to lookup or modify the Windows network settings 20->59 26 ipconfig.exe 20->26         started        signatures11 process12 signatures13 61 Modifies the context of a thread in another process (thread injection) 26->61 63 Maps a DLL or memory area into another process 26->63 65 Tries to detect virtualization through RDTSC time measurements 26->65 29 cmd.exe 1 26->29         started        process14 process15 31 conhost.exe 29->31         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-04-12 08:03:09 UTC
AV detection:
13 of 48 (27.08%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=56ef2uk3jvxbxs6wkdw7c6qitnwh2xzw7sw74zkjdtvet4hvhoiq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0953e54968ca9407a172c0a35a00d8b30ec603770809bbd2901a070e1b83b7f8
Formbook
53d50f3185dcbe2ab1787becd3ed35c4ef019841d01c62a3bc33f4abd7f8c93c
Formbook
56368dfb68347ec22ba4d8d1d16e1acc9dbf37acf30803ef92f75f27f0a6a6a5
Formbook
5d4c17f9ea28e3df3efa9d9c7ba40444abeee049fe999eb2d579c6cf4ccc3231
Formbook
8309d803c92faaf24828cd67e4c1041f9465ecf6c63f7608d7ed4579f075a02c
Formbook
851ee4f67cc28e3634b0062d77f62222d026c4e9674a894bcdd5b6c6e6bda376
Formbook
a2cdf452f83aa86c0f3ade321cfc00a9ed3671082372081a67cad84a26492051
Formbook
c69e54b704c7d7e94faa9c3ea2519eef344e1099aa99271833bc56cae00ab8af
Formbook
e5561555b0be45246e4ce5418a203d5a0d800595de770d772d0d86d0ed2662bb
Formbook
f130539b2d2324246449abb99f5a0effb214feee629b092d48ac63aca14e2ba6
Formbook
+ 4'556 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210412-161ytetn6s/
Behaviour
Creates scheduled task(s)
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.smarttel.management/msc/
Unpacked files
SH256 hash:
5e0f3da625a479a5e7e807b5f09c889d95474139410b312ba3a39bcb05976729
MD5 hash:
3d20c2ea9ac04e1707f853bb1780bc18
SHA1 hash:
805e90b023eb92d44bbe11daefce6edbe872cb74
Link:
https://www.unpac.me/results/ef74b5f6-a3c2-4146-a811-f4c073be9edc/
SH256 hash:
ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91
MD5 hash:
52322f04ee7e74ed0dee03b54dbb2b14
SHA1 hash:
8689cd483e8cc3ff397004f993c567161c4d3c41
Link:
https://www.unpac.me/results/ef74b5f6-a3c2-4146-a811-f4c073be9edc/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time

File information

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

Malspam

Formbook

ace bf1a73dd226861f1fa12ee848127d78e51ca105f7dd6d153a50ff90a9ac8cbb5

Formbook

Executable exe ef885d515b4d6e1bcbd650edf17a089b6c7d5f36fcadfe65491cea49f0f53b91

(this sample)

  
Dropped by
MD5 1575a90d70a067e1f29ebfb9b83bdb5f
  
Dropped by
SHA256 bf1a73dd226861f1fa12ee848127d78e51ca105f7dd6d153a50ff90a9ac8cbb5
  
Dropped by
Formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/133696/

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