MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b
SHA3-384 hash: 0b2ff6d47fe7846cc4fce37a0b0772dbe2fe9f892ee5a34f423dbd650428f79ed4d498860f4fa7474458df8523ee458e
SHA1 hash: bbcec44150facad7ee24c6c69329456fdd4cb011
MD5 hash: ca3395b17a2f8092f2f5054a06eccbee
humanhash: five-september-rugby-sweet
File name:DHL.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:1'230'364 bytes
First seen:2021-04-29 08:13:24 UTC
Last seen:2021-04-30 07:58:20 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ced282d9b261d1462772017fe2f6972b (127 x Formbook, 113 x GuLoader, 70 x RemcosRAT)
ssdeep 24576:vo/CR1x1bzaV635VOk+618+MNPUb2l0ixHH2KTeghL9xV:QqR13RL+lUe0ixHlThhL7V
Threatray 4'843 similar samples on MalwareBazaar
TLSH BB45014569FC247FE28736385F548A73A68B2EAC7A1C48577B9CBD222532833E31C5C1
Reporter fabjer
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
6
# of downloads :
108
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
tax invoice.com
Verdict:
Malicious activity
Analysis date:
2021-04-29 07:20:45 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/345b8b72-b57f-43f8-aab1-eb13c7e8aa4d

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/146480/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a process from a recently created file
Sending a UDP request
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/702774
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Detected FormBook malware
Found malware configuration
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
PE file has a writeable .text section
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Steal Google chrome login data
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 400311 Sample: DHL.exe Startdate: 29/04/2021 Architecture: WINDOWS Score: 100 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Antivirus detection for URL or domain 2->52 54 7 other signatures 2->54 10 DHL.exe 18 2->10         started        process3 file4 36 C:\Users\user\AppData\Roaming\...\udefrag.exe, PE32 10->36 dropped 38 C:\Users\user\AppData\...\libdms41.dll, PE32 10->38 dropped 40 C:\Users\user\AppData\...\WindowsInput.dll, PE32 10->40 dropped 42 C:\Users\user\...\Trinet.Core.IO.Ntfs.dll, PE32 10->42 dropped 13 udefrag.exe 10->13         started        process5 signatures6 66 Multi AV Scanner detection for dropped file 13->66 68 Machine Learning detection for dropped file 13->68 70 Modifies the context of a thread in another process (thread injection) 13->70 72 4 other signatures 13->72 16 explorer.exe 13->16 injected process7 dnsIp8 44 www.keeptalkservice.com 18.156.21.84, 49735, 49736, 49737 AMAZON-02US United States 16->44 46 System process connects to network (likely due to code injection or exploit) 16->46 20 mstsc.exe 1 18 16->20         started        signatures9 process10 file11 30 C:\Users\user\AppData\...\886logrv.ini, data 20->30 dropped 32 C:\Users\user\AppData\...\886logri.ini, data 20->32 dropped 56 Detected FormBook malware 20->56 58 Creates an undocumented autostart registry key 20->58 60 Tries to steal Mail credentials (via file access) 20->60 62 4 other signatures 20->62 24 cmd.exe 2 20->24         started        signatures12 process13 file14 34 C:\Users\user\AppData\Local\Temp\DB1, SQLite 24->34 dropped 64 Tries to harvest and steal browser information (history, passwords, etc) 24->64 28 conhost.exe 24->28         started        signatures15 process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-04-29 02:38:05 UTC
AV detection:
6 of 47 (12.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=unnhhgqrdbutpy3ythxamx3mdazpe7wirimca6pxvdznk6eedbfq._file
Verdict:
malicious
Similar samples:
05c3b01f3f582815a9a5c99845273306a23302342adf5215c7fb817e963cc4e0
FormBook
09f19a43e9a0b736e9fcd33359267340b91a2ccc376c8cda72fac9754c1493c0
FormBook
1baad45cc119fef01aa0a48c0ea82a6dc10c3365d44984d50f94f25866063474
FormBook
2ef41da6731f4164de8d3281a4b296965e8a34426f88e47cbfd44a5177419c5c
FormBook
41c87199c61ff26a9f486e5bc9b6bfd010b4c112922bad655599f9a06e2c0ffc
FormBook
5fb8b22a773eb50d70b1f58a72dd7903aa7162b40b64326c0a9985027943e083
FormBook
6c131f342e8226706ba1b39cc955852b022130c14ea12bd3b3cf340bbea25bf6
FormBook
720ffc99aa96c665aae27db46f776476c37ca113db207790579adfd81c73ad05
FormBook
98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96
FormBook
d7a09c129dfa6df78f94a517a08da22db5510621dca52f9f1a03ed436a08064c
FormBook
+ 4'833 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/210429-lz8xbxnvan/
Behaviour
Gathers network information
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Adds policy Run key to start application
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.hollandhousedesigns.design/vns/
Unpacked files
SH256 hash:
a1e2f9818a087da38206a1e23e5a95127b911df2bd7c70804bbd81450183d032
MD5 hash:
5a8609955908a625045e745daa1d0774
SHA1 hash:
c2a0a5d5f738dca67f9c50f52756dee8313e7f19
Link:
https://www.unpac.me/results/0fd78a8a-e95b-441a-9782-717e7bc01493/
SH256 hash:
133215b875fac1446af9e370824b75914e7a9ad5d400c9b4df83af7ee43e0162
MD5 hash:
d63adf244c67f49db42c8d0b56e412d1
SHA1 hash:
4d0510bb1cecb34263f145f9dc43a20be5712598
Link:
https://www.unpac.me/results/0fd78a8a-e95b-441a-9782-717e7bc01493/
SH256 hash:
a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b
MD5 hash:
ca3395b17a2f8092f2f5054a06eccbee
SHA1 hash:
bbcec44150facad7ee24c6c69329456fdd4cb011
Link:
https://www.unpac.me/results/0fd78a8a-e95b-441a-9782-717e7bc01493/
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/a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b

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

File information

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

Malspam

FormBook

img 921726237fd1bede19eb2ea67c8b5c6a7be69447d7affe2717aed0ae7f7837b2

FormBook

Executable exe a35a739a11186937e37899ee065f6c1832f27ec88a182079f7a8f2d57884184b

(this sample)

  
Dropped by
SHA256 921726237fd1bede19eb2ea67c8b5c6a7be69447d7affe2717aed0ae7f7837b2
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/146480/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-04-29 09:07:26 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0001.032] Anti-Behavioral Analysis::Timing/Delay Check GetTickCount
1) [C0032.001] Data Micro-objective::CRC32::Checksum
2) [C0026.002] Data Micro-objective::XOR::Encode Data
5) [C0045] File System Micro-objective::Copy File
6) [C0046] File System Micro-objective::Create Directory
7) [C0048] File System Micro-objective::Delete Directory
8) [C0047] File System Micro-objective::Delete File
9) [C0049] File System Micro-objective::Get File Attributes
10) [C0051] File System Micro-objective::Read File
11) [C0050] File System Micro-objective::Set File Attributes
12) [C0052] File System Micro-objective::Writes File
13) [E1510] Impact::Clipboard Modification
14) [C0034.001] Operating System Micro-objective::Set Variable::Environment Variable
15) [C0036.004] Operating System Micro-objective::Create Registry Key::Registry
16) [C0036.002] Operating System Micro-objective::Delete Registry Key::Registry
17) [C0036.007] Operating System Micro-objective::Delete Registry Value::Registry
18) [C0036.003] Operating System Micro-objective::Open Registry Key::Registry
19) [C0036.005] Operating System Micro-objective::Query Registry Key::Registry
20) [C0036.006] Operating System Micro-objective::Query Registry Value::Registry
21) [C0036.001] Operating System Micro-objective::Set Registry Key::Registry
22) [C0017] Process Micro-objective::Create Process
23) [C0038] Process Micro-objective::Create Thread
24) [C0018] Process Micro-objective::Terminate Process