MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997. 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 24 File information Comments
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SHA256 hash: 44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997
SHA3-384 hash: c2b3c3d63ed8e6f606e36570743fe41e2e0635933f25aa805e34f3ea9870e9147054667f5da12657f25293a2c1e2d512
SHA1 hash: f3021f6837d161cc41590743b226a216538ee738
MD5 hash: c195c34f7ac49cf8b51bb2bb01cfb7a0
humanhash: grey-sierra-low-sierra
File name:Signed Contract.exe
Download: download sample
Signature Formbook
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File size:853'504 bytes
First seen:2025-01-28 03:48:51 UTC
Last seen:2025-01-29 08:31:58 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:GMHY00j32NOKdkWptdLuMX0eS3+pxTu1UIcdN/U6PyJcbeXCBk1R0m30:GMHd42VDjLuX+PCSN7KJc1B0Omk
TLSH T1FC05DFD03F32B31ADEA96935D55ADDB592A11A78B0007AF76ACD7B4732CD112AE1CF00
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
File icon (PE):PE icon
dhash icon 66e69a98a2cada92 (5 x Formbook, 3 x SnakeKeylogger, 2 x MassLogger)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
10
# of downloads :
546
Origin country :
CH CH
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.21355.10102.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6798efb829ae628cf42a69f6
Tags:
virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/679853ae9bf752eb1c98d11b/reports/d6fb5b80-4d09-4362-93c2-21bd40e20de8/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997
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.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0f030fa4-470d-4ace-ac9b-b900b5a6a0f4
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1600969
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Joe Sandbox ML detected suspicious sample
Machine Learning detection for sample
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
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: 1600969 Sample: Signed Contract.exe Startdate: 28/01/2025 Architecture: WINDOWS Score: 100 30 www.031234103.xyz 2->30 32 www.weilaishijie.xyz 2->32 34 17 other IPs or domains 2->34 44 Suricata IDS alerts for network traffic 2->44 46 Antivirus detection for URL or domain 2->46 48 Multi AV Scanner detection for submitted file 2->48 52 5 other signatures 2->52 10 Signed Contract.exe 3 2->10         started        signatures3 50 Performs DNS queries to domains with low reputation 32->50 process4 file5 28 C:\Users\user\...\Signed Contract.exe.log, ASCII 10->28 dropped 13 Signed Contract.exe 10->13         started        process6 signatures7 64 Maps a DLL or memory area into another process 13->64 16 4KZLc6chhNoJ9MqX.exe 13->16 injected process8 signatures9 42 Found direct / indirect Syscall (likely to bypass EDR) 16->42 19 compact.exe 13 16->19         started        process10 signatures11 54 Tries to steal Mail credentials (via file / registry access) 19->54 56 Tries to harvest and steal browser information (history, passwords, etc) 19->56 58 Modifies the context of a thread in another process (thread injection) 19->58 60 3 other signatures 19->60 22 4KZLc6chhNoJ9MqX.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 36 031234103.xyz 144.76.229.203, 50045, 50046, 50047 HETZNER-ASDE Germany 22->36 38 kasun.wtf 82.221.136.24, 50029, 50030, 50031 THORDC-ASIS Iceland 22->38 40 7 other IPs or domains 22->40 62 Found direct / indirect Syscall (likely to bypass EDR) 22->62 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997/
Threat name:
ByteCode-MSIL.Trojan.Hesv
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Status:
Malicious
First seen:
2025-01-28 03:49:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
39
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=itb7ymeioxwqy36pjiiandrhsdvthf53iqntr3pigm3bgexxjglq._file
Verdict:
malicious
Label(s):
formbook
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unknown_loader_037
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Similar samples:
error
Formbook
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250128-edca9swmht/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/13968131-cc57-4cb1-8ba8-cd1e516add8a
Unpacked files
SH256 hash:
dce7ab11d9c70a43de3a801474b07fd1448d3cbb19e8e1c660280b9753cdfeef
MD5 hash:
af27f65a317e92c4128cefdaf40ed136
SHA1 hash:
4c814168907a8665c2124e21ae5d08b23eb9ca80
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/07a5a128-ba0f-4aa9-ae0c-40e198793a70/
Parent samples :
fd3164057ef5cfebb668b25b93a0638edf8d032f7a1e0c13249334bd913a1ad3
4f5485ab92f3a371c464a8e4d43fcbed828827f7d3cb4d96ba314dad62876bb6
44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997
75db64719f3225f1e42a86bb7cca56871f757076f81c42802e22a83629ac4fbb
4c9850cad6a1efce3f23362ff3f68fe5fee556e3e344e867f16ac821701e90ad
7c7a37f2a806c0e0845d2605f3f39cd7d80637d8a59ff7d2fa6a9125dfb329ee
415c6e1b1a10753be59eb88d1b2304d05b4f97e858724911ff82a86865ba3e86
be8bef17ae29e1e5c3fc07a4c27dd4a89ec744644aaa2900b0cd9cd9cc230f11
SH256 hash:
aa9b966dc4f8855064936556c1c4bd67d89754d8b321945791a2a1e7d7570134
MD5 hash:
57f0f230bff10de3ebb8d478db593505
SHA1 hash:
b5081e9ea201c3f8c3d5cb2ac506a1494483bd35
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/07a5a128-ba0f-4aa9-ae0c-40e198793a70/
SH256 hash:
6a9c22e6a30291d9625fdcdeb421f5cab15800699bce19b7a3885cfbd688dd78
MD5 hash:
9d8f2da247eead7b52122a8b296f67f1
SHA1 hash:
4fbffe02746e9630c093d35925f5e5d7bf988909
Link:
https://www.unpac.me/results/07a5a128-ba0f-4aa9-ae0c-40e198793a70/
SH256 hash:
d0d65e17bc00271ac595d8a84ca9ebfdc5f9b84501390e5179afffb5b9aa0b5d
MD5 hash:
738072ad4f5302a846a1f906dc1326d8
SHA1 hash:
3e6e596c83d87e95149b51dc62d9f49bc34ca880
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/07a5a128-ba0f-4aa9-ae0c-40e198793a70/
SH256 hash:
44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997
MD5 hash:
c195c34f7ac49cf8b51bb2bb01cfb7a0
SHA1 hash:
f3021f6837d161cc41590743b226a216538ee738
Link:
https://www.unpac.me/results/07a5a128-ba0f-4aa9-ae0c-40e198793a70/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/44c3fc308875/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_stackstrings
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Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
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Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
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Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

Formbook

Executable exe 44c3fc308875ed0c6fcf4a10068e2790eb3397bb441b38ede833361312f74997

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

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