MALICIOUS — 42e6b4bd39ff1f1e9e0665cbd74551abeb6ec2408e59db886058db0c7827e328

MALICIOUS — 42e6b4bd39ff1f1e9e0665cbd74551abeb6ec2408e59db886058db0c7827e328 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Prepender family. 7 of 56 detection engines flagged it, exhibiting 6 ATT&CK techniques.

Identification

SHA-256: 42e6b4bd39ff1f1e9e0665cbd74551abeb6ec2408e59db886058db0c7827e328
SHA-1: 0f1a04f3c178be3cf0ca325d81b8d755eb4cf495
MD5: 8afdeb9b79fc6c238ce3b2baf934b724
imphash: 5144a995e58e9a1dec8b8e0e5ed55aec
ssdeep: 98304:O0+pb0LdG0+pb0LdG0+pb0LdG0+pb0Ld:O0+pb0BG0+pb0BG0+pb0BG0+pb0B
TLSH: T1A75F8CCADDB32E1DDEDA2B553D0724CC559F1EE64A2A022CEF3384674997AFB1420421
Submitted as: 42e6b4bd39ff1f1e9e0665cbd74551abeb6ec2408e59db886058db0c7827e328
File type: pe · Size: 3264512 bytes
Verdict: malicious (100/100) · Family: Prepender

Detections (7 of 56 engines)

capa (capabilities): capability:collection/keylog
ClamAV (daily): Win.Trojan.Generic-9907165-0
YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
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

Why this verdict

The malicious score of 100/100 is the fusion of 17 weighted signals:

ClamAV (daily) flagged Win.Trojan.Generic-9907165-0 (rule Win.Trojan.Generic-9907165-0) - engine signal, weight 0.90, confidence 0.95
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 2 external host(s) and 5 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
capa (capabilities) flagged capability:collection/keylog (rule capability:collection/keylog) - engine signal, weight 0.35, 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 21 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
Memory forensics: 3 finding(s) elsewhere in the guest, not attributed to this sample, e.g. process hidden from a listing (rule windows.psxview.PsXView) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

70024 behavior events · 2 ATT&CK techniques · 28 dropped files.

Dropped files

C:\Program Files\Adobe\Acrobat DC\Acrobat\AcroBroker.exe - d9df7a971e6926952c5612ec76ce0ec5ebfd438127c382e4660183b5c93e4a0b
C:\Program Files\7-Zip\7zG.exe - 8b1e8233d5aa8aa3076376587bd05c5583e9088447e159f9e71644e2d364a8d4
c73b1958415a629ab7953bae059400cfaaa503d1cbb307eaaf3b7d0305381058 - c73b1958415a629ab7953bae059400cfaaa503d1cbb307eaaf3b7d0305381058
C:\Users\analyst\AppData\Local\Temp\tsk_af3400b9cb224bb8.exe.exe.exe - 6ca9badcaea1b0f19080d5949884ed2296f0fb63b27e9cb1bebf3b6290b805bd
C:\Program Files\7-Zip\7zG.exe.ico - 8cad493433ec34a34ca6f4fd49655aaf7cbb4337752743804db83ea6c050d1fe
C:\Program Files\7-Zip\7zFM.exe - 633ab4f29dc08245c0fca5b58f473dcbd6eeb0381f3ff829ad2baf53fb7d7608
C:\Program Files\7-Zip\Uninstall.exe.ico - ea0420b60b078a22fdcfd40d86d589793baa2e0327b37dcdcc5399aac4037d4e
C:\Program Files\Adobe\Acrobat DC\Acrobat\ADelRCP.exe - 5bf4caff0627071f7a270cdd9eb64fcff085db81ecbb26b387e8f51aea386b7e
C:\Program Files\Adobe\Acrobat DC\Acrobat\ADNotificationManager.exe - 0e779a86df1e36bf4736818bc49b1b23e328a63bcd851049465a49d1a9397197
C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe - 4d9d28275967183edafb794ac692ba4183368c62f020f61cd22929f6c3fd132b
C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe.exe - 2f6bce62cad35b5ad12111ca7db2f04e9e46d8cc7f386372f0727db702e5a000
C:\Program Files\Adobe\Acrobat DC\Acrobat\AcroTextExtractor.exe - d371e83cab9105b4d3e130068888c8d5e6208f34e46b79c2e30dc672100206e0
19ae4dc6481f738d164b59daa58659ddc4419911089464415840e7ab31e4bf4b - 19ae4dc6481f738d164b59daa58659ddc4419911089464415840e7ab31e4bf4b
C:\Users\analyst\AppData\Local\Temp\tsk_af3400b9cb224bb8.exe.exe.exe.exe.exe - 345191fdc728d2fec09de25b27148c83daafc92abd26b94f15197b2b18a4432a
C:\Program Files\7-Zip\7z.exe - 9aa7b81feaa07b296fc88be441830c1c616da0f734098b82369e9aa8e2b28b6e

Embedded URLs

http://www.eyuyan.com
http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl

Embedded domains

www.eyuyan.com
wtqq.net

Embedded IP addresses

20.184.175.19
4.230.171.124
4.144.132.114
52.110.12.31
52.110.12.32
40.84.85.40
135.234.160.244
85.210.193.152
52.148.114.188
72.153.5.140
52.110.12.16
52.110.12.24

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report