MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166
SHA3-384 hash: 76b6a71ecaa888307c3c696259ccbf71a91b8b17151a6455a965dcbd3366dfc77c3d4051ecaa6d326a96aa4448f9240b
SHA1 hash: 875ab647259a26c7c35e04f7ce1da47d4400fad0
MD5 hash: 83b3ff300291c9aa56318ad33aee9ec7
humanhash: bravo-alaska-purple-bravo
File name:wOSmfOhoXNtfGNb.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'303'040 bytes
First seen:2021-12-06 12:28:16 UTC
Last seen:2021-12-14 07:37:36 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:ulzbUN9aCnPBp+kqKhu0yUqEfGH/acgMTnoRagW+K8MULl:F4O5AzQYDacgaoLTMULl
Threatray 12'207 similar samples on MalwareBazaar
TLSH T1EF55691C25B5086BE97D1A354421077B4EF26C7D997BE3CD3B48316B0BB36840A267EE
File icon (PE):PE icon
dhash icon 86e8c0c8ccd89ce6 (18 x AgentTesla, 18 x Formbook, 8 x Loki)
Reporter malwarelabnet
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
144
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
wOSmfOhoXNtfGNb.exe
Verdict:
Suspicious activity
Analysis date:
2021-12-06 12:30:17 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4359b62a-ca98-49f2-b492-2cc69bcbda7c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/211767/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a custom TCP request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61ae02104d8e6f3a5e14657a/reports/dcd4fd6e-31b8-4e0a-91f3-8209c4c0e432/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3996ca8c-21ab-4ed8-93c9-d4edef8a8de9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/902243
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in malware configuration
Found malware configuration
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
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Powershell Defender Exclusion
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 534721 Sample: wOSmfOhoXNtfGNb.exe Startdate: 06/12/2021 Architecture: WINDOWS Score: 100 38 www.regenerativepatients.com 2->38 40 regenerativepatients.com 2->40 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 6 other signatures 2->50 11 wOSmfOhoXNtfGNb.exe 4 2->11         started        signatures3 process4 file5 36 C:\Users\user\...\wOSmfOhoXNtfGNb.exe.log, ASCII 11->36 dropped 60 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->60 62 Adds a directory exclusion to Windows Defender 11->62 64 Tries to detect virtualization through RDTSC time measurements 11->64 66 Injects a PE file into a foreign processes 11->66 15 wOSmfOhoXNtfGNb.exe 11->15         started        18 powershell.exe 24 11->18         started        signatures6 process7 signatures8 68 Modifies the context of a thread in another process (thread injection) 15->68 70 Maps a DLL or memory area into another process 15->70 72 Sample uses process hollowing technique 15->72 74 Queues an APC in another process (thread injection) 15->74 20 explorer.exe 15->20 injected 22 conhost.exe 18->22         started        process9 process10 24 chkdsk.exe 20->24         started        signatures11 52 Self deletion via cmd delete 24->52 54 Modifies the context of a thread in another process (thread injection) 24->54 56 Maps a DLL or memory area into another process 24->56 58 Tries to detect virtualization through RDTSC time measurements 24->58 27 explorer.exe 1 153 24->27         started        30 cmd.exe 1 24->30         started        32 explorer.exe 24->32         started        process12 dnsIp13 42 192.168.2.1 unknown unknown 27->42 34 conhost.exe 30->34         started        process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-06 12:29:16 UTC
File Type:
PE (.Net Exe)
Extracted files:
22
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lkgvvzt45uqmbc6n7m4qy5be3obo4oe3syyd7yxb6pt6da62gfta._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
10a4841b7d56afca3aad568e29fcd3c44f3a0d893aef62ee32471847be405797
Formbook
336a2648e0811ebd11a94bb59c5cd5ea06ff48485f734ce149a3f9f9a7e0c7f4
Formbook
4f6a9d2f8c26c5106123e3684d72d2624e58226f0c845a265cadf80e67b49842
Formbook
6d725aa4c3dd38bc7f924af4891b82a9c993e2db67765c72be42778a9c1b561a
Formbook
73bab1467e20985a16b6991800c45cde9334e5e4bab1ab26394d039f03915f2f
Formbook
a26563b8bb82e71f54068820dd88b7de84199111b66e33af94c09e2344d9db74
Formbook
f09288cc78739d3ea28dec0e501c7aa01cf695b0d642f56b7edddf09b42867e3
Formbook
fc74263d205e74a9afbb38b28b54576d528099a90877c2cb495715f4fbb96009
Formbook
+ 12'197 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ruje evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/211206-pnw4jaghc6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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 SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Deletes itself
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.regenerativepatients.com/ruje/
Unpacked files
SH256 hash:
46335ee824965f30ec8ee2d94a06aeb16780bacb4494bad9615107471bc10f64
MD5 hash:
6259b74d509ea12190861138209258d2
SHA1 hash:
8632ea07340fa03c77b1a38a55da1ac41dfc4898
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/4115aced-f041-4734-a00f-18975595ca55/
Parent samples :
5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166
83f231a4e196b10089d16db819c71bfc5cc543fb55ea5ea63aee2d1285ff3dc3
24a67748af038fb71279d9494318557036d86026598cdaa8822229221b5eac85
SH256 hash:
3a07741653541cea971004d2df5656df796e240e80d424a0135ec351d0b5b03f
MD5 hash:
2b9f1c5fdc6c6c23e4184ffa78d2fdf1
SHA1 hash:
de69afe07a2dfc63054f18c73bb27b20a3c16471
Link:
https://www.unpac.me/results/4115aced-f041-4734-a00f-18975595ca55/
SH256 hash:
1eba3e6e55f4aa87ee88dad11183f808f00870bf6277e3ae19fb31400a1dbe5b
MD5 hash:
00b620728472aef2af115e0455930cf8
SHA1 hash:
649a4ad0f13a3176ea36b855c1b36fbce246446a
Link:
https://www.unpac.me/results/4115aced-f041-4734-a00f-18975595ca55/
SH256 hash:
5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166
MD5 hash:
83b3ff300291c9aa56318ad33aee9ec7
SHA1 hash:
875ab647259a26c7c35e04f7ce1da47d4400fad0
Link:
https://www.unpac.me/results/4115aced-f041-4734-a00f-18975595ca55/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/5a8d5ae67ced20c08bcdfb390c7424db82ee389b96303fe2e1f3e7e183da3166

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_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
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/211767/

Comments