MALICIOUS — a8b70d8d3a3f70e6683db5dc31933fc9f004f37d869fb212f7068dae2d4d9fb2

MALICIOUS — a8b70d8d3a3f70e6683db5dc31933fc9f004f37d869fb212f7068dae2d4d9fb2 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the PolyRansom family. 6 of 56 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

SHA-256: a8b70d8d3a3f70e6683db5dc31933fc9f004f37d869fb212f7068dae2d4d9fb2
SHA-1: 9c4959b05361f5d23cf13ee44a232a3fcf1ba273
MD5: f6d52a0bac56193c076a4b9c4fe3ffe6
imphash: d41d8cd98f00b204e9800998ecf8427e
ssdeep: 6144:ftoe/FeQkrFkcoJibIqORGsRvJpQ15klOk9zxXo5M7ZlKoZxDtSf/J:6qFeQkr02wZjw/
TLSH: T1EB423ACC54D0BC04D210DF49077DBFFE29624C1D1D35FAAC8B99AA98A61B1C388D13A9
Submitted as: a8b70d8d3a3f70e6683db5dc31933fc9f004f37d869fb212f7068dae2d4d9fb2
File type: pe · Size: 217088 bytes
Verdict: malicious (100/100) · Family: PolyRansom

Detections (6 of 56 engines)

MalwareAnalyser heuristics (entropy/packer): high-entropy-sections:.text
ClamAV (daily): BC.Win.Virus.Ransom-9157.A
Microsoft Defender: Virus:Win32/Nabucur.A
Emsisoft (Emergency Kit): Win32.Virlock.Gen.4
Trellix Stinger (McAfee): W32/VirRansom
Kaspersky (KVRT): Virus.Win32.PolyRansom.a

MITRE ATT&CK

Why this verdict

The malicious score of 100/100 is the fusion of 14 weighted signals:

ClamAV (daily) flagged BC.Win.Virus.Ransom-9157.A (rule BC.Win.Virus.Ransom-9157.A) - engine signal, weight 0.90, confidence 0.95
2 behavioral detection(s) across 2 rule(s): Registry Run Key Persistence [high] (rule tl-run-key) - dynamic signal, weight 0.63, confidence 0.90
Microsoft Defender flagged Virus:Win32/Nabucur.A (rule Virus:Win32/Nabucur.A) - engine signal, weight 0.55, confidence 0.85
Emsisoft (Emergency Kit) flagged Win32.Virlock.Gen.4 (rule Win32.Virlock.Gen.4) - engine signal, weight 0.55, confidence 0.85
Trellix Stinger (McAfee) flagged W32/VirRansom (rule W32/VirRansom) - engine signal, weight 0.55, confidence 0.85
Kaspersky (KVRT) flagged Virus.Win32.PolyRansom.a (rule Virus.Win32.PolyRansom.a) - engine signal, weight 0.55, confidence 0.85
Observed at runtime: Registry Run Key Persistence (T1547.001) (rule Registry Run Key Persistence) - dynamic signal, weight 0.40, confidence 0.90
Observed at runtime: Windows Service (T1543.003) (rule Windows Service) - dynamic signal, weight 0.40, confidence 0.90
Contacted 5 external host(s) and 6 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
MalwareAnalyser heuristics (entropy/packer) flagged high-entropy-sections:.text (rule high-entropy-sections:.text) - engine signal, weight 0.35, confidence 0.70
Packing/obfuscation: high-entropy-sections:.text - static signal, weight 0.25, confidence 0.55
Dropped 12 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: 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)

12824 behavior events · 3 ATT&CK techniques · 29 dropped files.

Dropped files

C:\ProgramData\xiocAsMc\yKgEskQE - eee3ff71a8faee8b970f854408b4ab90b60702e820204cb6357f4e56104f9e0f
C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\device.png.exe - e2a056fe73053fc8a5496a56367b3b373a7ecf1b01a0a82d791c4be4457a40a2
bd115a575e86e61cea9136c5a2c47e090ba484dc2dee8b51a34111bb094266d5 - bd115a575e86e61cea9136c5a2c47e090ba484dc2dee8b51a34111bb094266d5
C:\Users\analyst\rSwIoccE\vcIYEIkQ - faba02d61d733750725846c007fb76e0a180c8abf378a183515ee5fb4b4fb1cd
C:\Users\analyst\AppData\Local\Temp\skUIkcYs.bat - e172867f07cebde9e5ad4dddea7f2d468c1176d87954a62083e374402a39d5f6
C:\ProgramData\xiocAsMc\yKgEskQE.exe - 638f22f84a22ea88089aa55bfc877707d00ccf17d969f4a25811952bb1c0e38b
C:\ProgramData\xiocAsMc\yKgEskQE.inf - 12a98aa2c4e6cf0758ce062a2036d66217e2a28374391c69addcd7063f652498
C:\Users\analyst\AppData\Local\Temp\dYEEMMsA.bat - e0362726907cd63168bc14102468d379d8a7f604fad54ad7412d60628f8a583c
C:\Users\analyst\rSwIoccE\vcIYEIkQ.exe - 36c7511f0270e3658692550754cb0d840460638616d3226c3015acdcf0470406
C:\Users\analyst\AppData\Local\Temp\EQQi.ico - bcb253ea3735a0cf0a8c6ee06c14c884937c64ddeacedb17240e40d403577620
C:\Users\analyst\AppData\Local\Temp\tsk_f7854e4a9c83481b - decd001e84b93162cfde052bcea5acfc49d525c980d157536b189a79d9fab43f
C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\background.png - d3e8d47e8c1622ec10adef672ca7a8992748c4f0a4e75f877462e7e661069698
C:\Users\analyst\AppData\Local\Temp\QiEkQgkM.bat - 5d487907b6bc5b1cf91448aa92de53fae5b94458276ae068a0bbc93f48e8ff4b
C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\background.png.exe - 1b21df2a476fa1755d2cba4a68da3a2d1785dc8df9d6a55e1e3912ff6a9ee599
C:\Users\analyst\AppData\Local\Temp\PSsksEks.bat - 5882e8dd6bb5722476d4c38c621bfea4efbbe691f2cdff8e7858f93e68c178b7

Embedded URLs

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

Embedded IP addresses

4.150.223.113
52.123.252.241
4.230.171.124
57.155.104.224
4.144.132.223
135.232.92.97
40.79.167.9
135.232.92.137
104.18.33.89
74.179.77.204
200.87.164.69
172.66.2.5
200.119.204.12
52.110.12.22
190.186.45.170
52.110.12.32
125.56.205.24
125.56.205.59
52.148.114.188
52.231.23.200
20.42.65.85
72.145.35.111
52.110.12.8
52.110.12.26

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report