MALICIOUS — 39bf9153e37936fe3eb634050e6316a9e04906a9770ad072498945172185eda7

MALICIOUS — 39bf9153e37936fe3eb634050e6316a9e04906a9770ad072498945172185eda7 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Prepender family. 10 of 56 detection engines flagged it, exhibiting 7 ATT&CK techniques.

Identification

SHA-256: 39bf9153e37936fe3eb634050e6316a9e04906a9770ad072498945172185eda7
SHA-1: b53323e962c2a0e2c6271257f5fb21a852a3e9ba
MD5: f5538273a29a4446981f02ee508de6d5
imphash: 5144a995e58e9a1dec8b8e0e5ed55aec
ssdeep: 12288:NBqYEg6KZirlCW1ndDHAV0V+mPnw5iiZtfAwSfxL/2Dc3jDLLmt0LDQewsAjRE:2YEcZzW1ndMVtLXtoaewsAju
TLSH: T13954BEB6B40EB659D06B77EF1C903D8E2021728A6D7F108893B2DB6855E3C733750A61
Submitted as: 39bf9153e37936fe3eb634050e6316a9e04906a9770ad072498945172185eda7
File type: pe · Size: 1162536 bytes
Verdict: malicious (100/100) · Family: Prepender

Detections (10 of 56 engines)

YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
capa (capabilities): capability:collection/keylog
ClamAV (daily): Win.Trojan.Generic-9907165-0
YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
YARA: MalwareAnalyser community pack: TL_Shellcode_VirtualAlloc_Exec
YARA: Yara-Rules community: YR_AntiDebug_Checks
Microsoft Defender: Virus:Win32/Pidgeon.A
Emsisoft (Emergency Kit): Win32.Prepender.Gen.1
Trellix Stinger (McAfee): Flyagent.d
Kaspersky (KVRT): Virus.Win32.Agent.ev

MITRE ATT&CK

YARA

Windows_Injection_Api_Combo

Why this verdict

The malicious score of 100/100 is the fusion of 22 weighted signals:

ClamAV (daily) flagged Win.Trojan.Generic-9907165-0 (rule Win.Trojan.Generic-9907165-0) - engine signal, weight 0.90, confidence 0.95
Process injection API combination (rule Windows_Injection_Api_Combo) - yara signal, weight 0.65, confidence 0.90
Microsoft Defender flagged Virus:Win32/Pidgeon.A (rule Virus:Win32/Pidgeon.A) - engine signal, weight 0.55, confidence 0.85
Emsisoft (Emergency Kit) flagged Win32.Prepender.Gen.1 (rule Win32.Prepender.Gen.1) - engine signal, weight 0.55, confidence 0.85
Trellix Stinger (McAfee) flagged Flyagent.d (rule Flyagent.d) - engine signal, weight 0.55, confidence 0.85
Kaspersky (KVRT) flagged Virus.Win32.Agent.ev (rule Virus.Win32.Agent.ev) - engine signal, weight 0.55, confidence 0.85
YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.60, confidence 0.70
2 behavioral detection(s) across 2 rule(s): Windows Service Installation [medium] (rule tl-service-install) - dynamic signal, weight 0.43, confidence 0.90
Observed at runtime: Windows Service (T1543.003) (rule Windows Service) - dynamic signal, weight 0.40, confidence 0.90
capture keystrokes (rule capture keystrokes) - capa signal, weight 0.40, confidence 0.80
Contacted 17 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
Anti-analysis: T1497.001 - dynamic signal, weight 0.40, confidence 0.75
YARA: Yara-Rules community flagged YR_AntiDebug_Checks (rule YR_AntiDebug_Checks) - engine signal, weight 0.35, confidence 0.70
YARA: MalwareAnalyser built-in flagged Windows_Injection_Api_Combo (rule Windows_Injection_Api_Combo) - engine signal, weight 0.35, confidence 0.70
capa (capabilities) flagged capability:collection/keylog (rule capability:collection/keylog) - engine signal, weight 0.35, confidence 0.70
YARA: MalwareAnalyser community pack flagged TL_Shellcode_VirtualAlloc_Exec (rule TL_Shellcode_VirtualAlloc_Exec) - engine signal, weight 0.30, confidence 0.70
Embedded network infrastructure: http://www.eyuyan.com - static signal, weight 0.35, confidence 0.60
communicate over HTTP (rule communicate over HTTP) - capa signal, weight 0.30, confidence 0.60
Dropped 18 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
inject code into another process (rule inject code into another process) - capa signal, weight 0.12, confidence 0.60
Memory forensics: 2 finding(s) elsewhere in the guest, not attributed to this sample, e.g. SSDT hook (rule windows.ssdt.SSDT) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

68712 behavior events · 2 ATT&CK techniques · 25 dropped files.

Dropped files

C:\Program Files\7-Zip\7z.exe - dd2a47be6fc94b361cc97e044b1aea6cfe8e41c754dae8236a5e8135a418b1af
C:\Program Files\7-Zip\7zG.exe.ico - 8cad493433ec34a34ca6f4fd49655aaf7cbb4337752743804db83ea6c050d1fe
C:\Program Files\7-Zip\Uninstall.exe.ico - ea0420b60b078a22fdcfd40d86d589793baa2e0327b37dcdcc5399aac4037d4e
C:\Program Files\Adobe\Acrobat DC\Acrobat\ADelRCP.exe - d62faee5f97d30c0a2af5b59706a980bd2f8d1351b07e5a45b724ace6fde1588
C:\Users\analyst\AppData\Local\Temp\tsk_2e71cf7bf4694127.exe.exe - 7bd989dbfe774025140b454206caa67a87ae50ac8dbe4bcd37c0b02a3c8e7a91
19ae4dc6481f738d164b59daa58659ddc4419911089464415840e7ab31e4bf4b - 19ae4dc6481f738d164b59daa58659ddc4419911089464415840e7ab31e4bf4b
C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe - 735c63630ae3c9919a498191526b365109244cd2a8b92a7ce226613ebcffaac3
C:\Program Files\7-Zip\Uninstall.exe.exe - 41adffebdf59fb7de1c7f192424f87a511aff25c3aa48f14de70cebff4680410
C:\Program Files\Adobe\Acrobat DC\Acrobat\acrobat_sl.exe - 5f3f7086abfba0a37cf2cc105f7043acd23575bd2de90798f232bf5c0ce0f856
9d46d6f9f0bcdd6256be58b289778aa0c2f1d724b4ea33450f6e498f34705ac8 - 9d46d6f9f0bcdd6256be58b289778aa0c2f1d724b4ea33450f6e498f34705ac8
C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe.exe - e7242672a2c8db229c1c5b5a041592f6b1d221f3f3fbce5731bd2ab8d715b55e
C:\Program Files\7-Zip\7zG.exe.exe - 78f58a545ee5bb1e7fe403aaed5046218be73ea41bf2be0839ecf09fdf8525e1
C:\Program Files\Adobe\Acrobat DC\Acrobat\ADNotificationManager.exe.ico - 14b347748c4d208fa5294f7bdd53ae4147d40e27cf810dd60423af0d8b0c989c
C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe - 87a991dff0f7908896906676405ddc03663ece6491d216dbd3b9de87848c9dd3
C:\Program Files\Adobe\Acrobat DC\Acrobat\AcroBroker.exe - e61517326ff0cef816b983734551b8f37b07ce42dd7ce08ed4fbda197a7e75c9

Embedded URLs

http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0
http://www.microsoft.com/pki/certs/MicCodSigPCA_08-31-2010.crt0
http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0T
http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt0
http://www.microsoft.com/pki/certs/MicTimStaPCA_2010-07-01.crt0
http://www.eyuyan.com
http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl
http://c.pki.goog/r/r1.crl
http://x2.c.lencr.org/
http://ye.c.lencr.org/
http://c.pki.goog/wr2/9UVbN0w5E6Y.crl
http://yr.c.lencr.org/

Embedded domains

crl.microsoft.com
www.microsoft.com
www.eyuyan.com
wtqq.net
x1.c.lencr.org
x2.c.lencr.org
ye.c.lencr.org
yr.c.lencr.org

Embedded IP addresses

20.184.175.15
4.230.171.124
20.42.179.204
74.178.240.51
52.168.117.171
74.179.77.204
20.247.184.142
172.64.154.167
135.234.160.245
40.84.97.4
52.148.114.188
72.153.5.136
52.110.12.8
52.110.12.48

File paths

C:\btvsts\3481\private\softgrid\shared\include\command_line_cleaner.hpp
T:\:d:l:t:
X:\:`:d:h:l:p:t:x:
T:\:h:

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report