MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c. 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: 15


Intelligence 15 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c
SHA3-384 hash: 41eb3ee5ef6664f112f572ec5552aafca9ed9be1023d4b70ad9517c15f2fbb3c5d3ef70683e6f9fa66820ca53cf04772
SHA1 hash: 8357a1843dd02ffbe7868d7b6a147f756f0c2c15
MD5 hash: e815bfb9469d43d389cdd898576562b2
humanhash: fanta-snake-double-connecticut
File name:OSL8979.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:548'352 bytes
First seen:2022-05-16 05:25:39 UTC
Last seen:2022-05-17 07:39:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:q0YSUia+oNXWUMB1+AZQa8g79xU3eyAnKMNjUZIvRWpcKyDfJmfb9hW:5YSUK2i7R8gJwAnjSZAKyDhGDW
Threatray 14'881 similar samples on MalwareBazaar
TLSH T113C42244B7EC4322D2FE6F32563649010776B026A512DB3F5EC684D52E33F0AA79678B
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c0b0c6c8a896a0c0 (20 x AgentTesla, 19 x Formbook, 12 x Loki)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
231
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
OSL8979.exe
Verdict:
Malicious activity
Analysis date:
2022-05-16 08:25:13 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/1a4b6358-9ca1-43ee-85ee-f84134d9c05c

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/270881/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Sending a custom TCP request
Launching a process
Creating a process with a hidden window
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed replace.exe wacatac
Link:
https://www.filescan.io/uploads/6281e0736b2a366ce413cc97/reports/3ce9cf84-723b-4507-b709-136653d6fa00/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/137556ed-1a9d-414f-91b2-ec1992beba3b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/994568
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.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
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
Self deletion via cmd delete
Snort IDS alert for network traffic
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 netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 627064 Sample: OSL8979.exe Startdate: 16/05/2022 Architecture: WINDOWS Score: 100 45 www.visitdestin.info 2->45 47 www.hotstarcareers.com 2->47 49 4 other IPs or domains 2->49 57 Snort IDS alert for network traffic 2->57 59 Found malware configuration 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 11 other signatures 2->63 11 OSL8979.exe 7 2->11         started        signatures3 process4 file5 37 C:\Users\user\AppData\Roaming\imsmTJVn.exe, PE32 11->37 dropped 39 C:\Users\...\imsmTJVn.exe:Zone.Identifier, ASCII 11->39 dropped 41 C:\Users\user\AppData\Local\...\tmpCF3D.tmp, XML 11->41 dropped 43 C:\Users\user\AppData\...\OSL8979.exe.log, ASCII 11->43 dropped 69 Uses schtasks.exe or at.exe to add and modify task schedules 11->69 71 Adds a directory exclusion to Windows Defender 11->71 73 Tries to detect virtualization through RDTSC time measurements 11->73 75 Injects a PE file into a foreign processes 11->75 15 OSL8979.exe 11->15         started        18 powershell.exe 25 11->18         started        20 schtasks.exe 1 11->20         started        signatures6 process7 signatures8 85 Modifies the context of a thread in another process (thread injection) 15->85 87 Maps a DLL or memory area into another process 15->87 89 Sample uses process hollowing technique 15->89 91 Queues an APC in another process (thread injection) 15->91 22 explorer.exe 15->22 injected 26 conhost.exe 18->26         started        28 conhost.exe 20->28         started        process9 dnsIp10 51 nasipkepenk.com 176.53.65.72, 49808, 80 RADORETR Turkey 22->51 53 www.hotstarcareers.com 23.80.21.146, 49811, 80 LEASEWEB-USA-LAX-11US United States 22->53 55 www.nasipkepenk.com 22->55 65 System process connects to network (likely due to code injection or exploit) 22->65 67 Uses netsh to modify the Windows network and firewall settings 22->67 30 netsh.exe 22->30         started        signatures11 process12 signatures13 77 Self deletion via cmd delete 30->77 79 Modifies the context of a thread in another process (thread injection) 30->79 81 Maps a DLL or memory area into another process 30->81 83 Tries to detect virtualization through RDTSC time measurements 30->83 33 cmd.exe 1 30->33         started        process14 process15 35 conhost.exe 33->35         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-05-16 03:42:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
18 of 41 (43.90%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=eu2ngbyfae33jfkig3ze63kdwogajfuxsgl4a6uxom3cazyb6rga._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
508cb22224be3ffe5f189767b150490b717fdfbbdea4ea41c3a1add4ecfe7730
Formbook
58d325351b79f84d68ef5586de43ec3708fc0e142a83007fddbd7a05c20021ce
Formbook
786940cf8fc524d46f8b3a0e72883d63c23315ea642c38f75d897e2162404e3e
Formbook
89a9b77261ed533dbce028de014c1e6b35ffae6419d2c9dc12178bfc49f7e5af
Formbook
b02d4d23621c721c923d3772118c91d76cbe9c268895aef2d1933ba3fed08a62
Formbook
b409cabbc8dbdfa8a3d1a60cb225f27386dfcc61b3f7379812218b6660ef654f
Formbook
bec8c6b5504f6063eb944f8fc571e5f35b0ee6f6a6234dcbac63fe5479d82f13
Formbook
e01aab97bf2805546ef29b22bb0d9e3e2205d4a319faaf6f7f4ce966b8aaa149
Formbook
+ 14'871 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:xp73 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220516-f4ve7sehc4/
Behaviour
Creates scheduled task(s)
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
Checks computer location settings
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
81a128fdf0d6a67f945d19f7bbc43f1594802a96384e714f9d11422f3802c17e
MD5 hash:
1c833ee8c9bf4dfa81a876e50877d722
SHA1 hash:
c7f0206399c2a47d4aa5e5602b30b8a8511a3df3
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/1461ad0b-3460-4190-9c87-dd6ab6880e9f/
Parent samples :
df75c3ba349f80f2bdeaea0169f8d27e361428f2c814cf0fbb09df53e6f5576a
2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c
2191a4ebf32c079a54233a65aa7bfb67e1b8824e03e9387e9c843713c6e927f2
SH256 hash:
eafc950a2c955646c508ceddb9fa0940593b5791c1d1a39f95cac1d330dfec4a
MD5 hash:
7abeee8cec97b38652ee8d95ef545d5e
SHA1 hash:
c84db85293ac79700012dd51f6acaa5d31c3a657
Link:
https://www.unpac.me/results/1461ad0b-3460-4190-9c87-dd6ab6880e9f/
SH256 hash:
709fdbef8932044e42231f14888aa12b12ddc571e6daba8af86d624a39fa63bf
MD5 hash:
a7a6647650fe0204d1ab042824d638be
SHA1 hash:
a1194aba19ab6190a412073fe1918cd1b559aacf
Link:
https://www.unpac.me/results/1461ad0b-3460-4190-9c87-dd6ab6880e9f/
SH256 hash:
b51d5fbad6df2bde4ee46d7d67d6bb446d00c1bf26540806251f32ab6605486b
MD5 hash:
f2a75e553c7783eedc7e71aef41d36a4
SHA1 hash:
82ac9316837e46b0e4d8097ef1cb191aee578ea5
Link:
https://www.unpac.me/results/1461ad0b-3460-4190-9c87-dd6ab6880e9f/
SH256 hash:
2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c
MD5 hash:
e815bfb9469d43d389cdd898576562b2
SHA1 hash:
8357a1843dd02ffbe7868d7b6a147f756f0c2c15
Link:
https://www.unpac.me/results/1461ad0b-3460-4190-9c87-dd6ab6880e9f/
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/2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c

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
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 2534d307050137b4954836f24f6d43b38c0496979197c07a977336206701f44c

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/270881/

Comments