MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e. 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: 13


Intelligence 13 IOCs YARA 5 File information Comments
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SHA256 hash: efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e
SHA3-384 hash: b48adf93ca71a96dcb3c565ee1a07f810766c281b12147514ba1432e7feb4e6c3e1f04fc8790a98146865b6c5999e419
SHA1 hash: 283882ea8a5c557c63eb3941eb8fdd6298bdc86f
MD5 hash: 9f95195d65c34c3b3bc599e399196cbb
humanhash: maine-spring-enemy-nebraska
File name:Inquiry176801.PDF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:471'040 bytes
First seen:2021-10-15 17:56:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:yLHCTgMkhBnCnz0WLvFZ5Q+VHI3Yhfo5P7cYpXHjp/cvTWXZUGrmxbdM:yLcSBsYQvf5pVo3+fY7RTpkrsUN
Threatray 10'551 similar samples on MalwareBazaar
TLSH T18AA48C4DA3644287F0082B35DA7D3F590270197C79C1EBE8F9A5761BEEE1BA6153302B
File icon (PE):PE icon
dhash icon 6dd2d312dbc8cc49 (94 x Formbook, 5 x AgentTesla)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
317
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Inquiry176801.PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-10-15 17:57:55 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/4420241e-d4e1-47f4-87e3-4a23330a8192

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/197800/
Detection(s):
SecuriteInfo.com.BackDoor.SpyBotNET.25.9935.4201.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/6169c0f4db358dd15eba357b/reports/b8d6f9a0-4531-4a2a-b84f-41f0c35711f1/overview
Result
Verdict:
UNKNOWN
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/67e238ef-8874-4ba8-bcad-cfd9d9c384c5
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/871273
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for domain / URL
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Suspicious Double Extension
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 an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 503700 Sample: Inquiry176801.PDF.exe Startdate: 15/10/2021 Architecture: WINDOWS Score: 100 32 www.atlanticshipsupply.com 2->32 36 Multi AV Scanner detection for domain / URL 2->36 38 Found malware configuration 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 9 other signatures 2->42 10 Inquiry176801.PDF.exe 3 2->10         started        signatures3 process4 signatures5 52 Tries to detect virtualization through RDTSC time measurements 10->52 54 Injects a PE file into a foreign processes 10->54 13 Inquiry176801.PDF.exe 10->13         started        16 Inquiry176801.PDF.exe 10->16         started        18 Inquiry176801.PDF.exe 10->18         started        20 Inquiry176801.PDF.exe 10->20         started        process6 signatures7 56 Modifies the context of a thread in another process (thread injection) 13->56 58 Maps a DLL or memory area into another process 13->58 60 Sample uses process hollowing technique 13->60 62 Queues an APC in another process (thread injection) 13->62 22 explorer.exe 12 13->22         started        26 explorer.exe 13->26 injected process8 dnsIp9 44 System process connects to network (likely due to code injection or exploit) 22->44 46 Performs DNS queries to domains with low reputation 22->46 48 Self deletion via cmd delete 22->48 50 3 other signatures 22->50 28 cmd.exe 1 22->28         started        34 www.zscyyds.xyz 192.168.241.1, 80 unknown unknown 26->34 signatures10 process11 process12 30 conhost.exe 28->30         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-10-15 17:57:09 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5675c7je55porzkkotxzkjzznvirxtnn4gbguhai5zhsma7mpgha._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
336a2648e0811ebd11a94bb59c5cd5ea06ff48485f734ce149a3f9f9a7e0c7f4
Formbook
359ecb05de93b2ccc31cc15d249ef69a564d2f2e63d925126a6d784ef224766b
Formbook
4bd4b9f79c629ce5f602b3cc8bacefb6c3779498d66b946be9da734111659f23
Formbook
6d725aa4c3dd38bc7f924af4891b82a9c993e2db67765c72be42778a9c1b561a
Formbook
7351be6f0f343fff3cc33d3b70a75a1a1de3a5d4c9e74b9a4af32f14461f5de5
Formbook
88ee9016160ae1abb6391106ed1c03782a7bd8b157272c7684aafb1c22b3e06e
Formbook
c12bd972fbf3301e40fa75c3e295a8bd0233bf1f5fa100e79ab7f6755f7b6788
Formbook
cb1140dd7751382a2d56c59755a2ff38b239805148af2d108cf4f1399ca0f753
Formbook
+ 10'541 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:useb rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/211015-wjmsmacaal/
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
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.sale-stihl.com/useb/
Unpacked files
SH256 hash:
3a64128cc4ac02ee96dec8a6aea77662efd61010d122785153c20bdbcd28e245
MD5 hash:
30183ef9586be22140984d588dac1cdc
SHA1 hash:
4d7f001ce583b6204fe00d791327e681c4fda302
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/1c23751a-d17c-46ca-80c0-5c5c0f28da9b/
Parent samples :
88ee9016160ae1abb6391106ed1c03782a7bd8b157272c7684aafb1c22b3e06e
4bd4b9f79c629ce5f602b3cc8bacefb6c3779498d66b946be9da734111659f23
efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e
SH256 hash:
891f8984c5ea6d7bec2a7b2f71ce10021b12cef997e421ff617598afb2c5295a
MD5 hash:
7bcce5a50f30a21656ac09b04d178673
SHA1 hash:
44946683bb0e66e93570d35061750224aa4c4b0f
Link:
https://www.unpac.me/results/1c23751a-d17c-46ca-80c0-5c5c0f28da9b/
SH256 hash:
eda4d687b865aed0078ab87078de7d9722888b2d2af71c6fc0dcdc986ffb7567
MD5 hash:
12cf5402be16590c300b442a66e9ebc1
SHA1 hash:
0ea28394d301ca1ce840f039d2da62a5ce6d9334
Link:
https://www.unpac.me/results/1c23751a-d17c-46ca-80c0-5c5c0f28da9b/
SH256 hash:
efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e
MD5 hash:
9f95195d65c34c3b3bc599e399196cbb
SHA1 hash:
283882ea8a5c557c63eb3941eb8fdd6298bdc86f
Link:
https://www.unpac.me/results/1c23751a-d17c-46ca-80c0-5c5c0f28da9b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e

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:crime_win32_ransom_avaddon_1
Create hunting rule
Author:@VK_Intel
Description:Detects Avaddon ransomware
Reference:https://twitter.com/VK_Intel/status/1300944441390370819
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.

Malspam

Formbook

Executable exe efbfd17d24ef5ee8e54a74ef9527396d511bcdade1826a1c08ee4f2603ec798e

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/197800/

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