yunsip | 367706be25c97a45c6cd40aaaee709f7902ae33a1e6b071743e525a8a392ac17

Analysis

max time kernel
94s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2025, 22:12 UTC

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General

Target

367706be25c97a45c6cd40aaaee709f7902ae33a1e6b071743e525a8a392ac17.dll
Size

774KB
MD5

f0568460f201546ed14b99f216c256be
SHA1

7bd1bc93fbc8c58ff7983f8e3f364bfc634cca4c
SHA256

367706be25c97a45c6cd40aaaee709f7902ae33a1e6b071743e525a8a392ac17
SHA512

4294c5021bd753bd9c12a825b3fba1ddfb70a5d56ea2b90bb7bf5dba3ac310d9c55ee77284e783e2d79172db8d4c2b6e90be5fd07173a09e427cb8c6938882c2
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0X:jDgtfRQUHPw06MoV2nwTBlhm8P

Score

10^/10

yunsip banker discovery trojan

Malware Config

Signatures

Yunsip
Remote backdoor which communicates with a C2 server to receive commands.
trojan banker yunsip
Yunsip family
yunsip

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 640	3060	rundll32.exe	87
PID 3060 wrote to memory of 640	3060	rundll32.exe	87
PID 3060 wrote to memory of 640	3060	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\367706be25c97a45c6cd40aaaee709f7902ae33a1e6b071743e525a8a392ac17.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\367706be25c97a45c6cd40aaaee709f7902ae33a1e6b071743e525a8a392ac17.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:640

Network

GET

https://tse1.mm.bing.net/th?id=OADD2.10239340418603_15DZPLB0SHJXVDM66&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=1920&h=1080&dynsize=1&qlt=90

Remote address:

150.171.28.10:443

Request

GET /th?id=OADD2.10239340418603_15DZPLB0SHJXVDM66&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=1920&h=1080&dynsize=1&qlt=90 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041

Response

HTTP/2.0 200

cache-control: public, max-age=2592000
content-length: 707951
content-type: image/jpeg
x-cache: TCP_HIT
access-control-allow-origin: *
access-control-allow-headers: *
access-control-allow-methods: GET, POST, OPTIONS
timing-allow-origin: *
report-to: {"group":"network-errors","max_age":604800,"endpoints":[{"url":"https://aefd.nelreports.net/api/report?cat=bingth&ndcParam=QUZE"}]}
nel: {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: 845794855EB74CDEBCCB0D59C88EBAE3 Ref B: FRA31EDGE0122 Ref C: 2025-02-25T22:14:25Z
date: Tue, 25 Feb 2025 22:14:25 GMT
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301477_14PVM3YMRTCSD2NZ8&pid=21.2&c=3&w=1080&h=1920&dynsize=1&qlt=90

Remote address:

150.171.28.10:443

Request

GET /th?id=OADD2.10239317301477_14PVM3YMRTCSD2NZ8&pid=21.2&c=3&w=1080&h=1920&dynsize=1&qlt=90 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041

Response

HTTP/2.0 200

cache-control: public, max-age=2592000
content-length: 694757
content-type: image/jpeg
x-cache: TCP_HIT
access-control-allow-origin: *
access-control-allow-headers: *
access-control-allow-methods: GET, POST, OPTIONS
timing-allow-origin: *
report-to: {"group":"network-errors","max_age":604800,"endpoints":[{"url":"https://aefd.nelreports.net/api/report?cat=bingth&ndcParam=QUZE"}]}
nel: {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: A61FB1C32B2F4CDCB6FF72E64946D3F2 Ref B: FRA31EDGE0122 Ref C: 2025-02-25T22:14:26Z
date: Tue, 25 Feb 2025 22:14:25 GMT

150.171.28.10:443

tls, https

164 B
40 B
2
1
150.171.28.10:443

322 B
7
150.171.28.10:443

322 B
7
150.171.28.10:443

tse1.mm.bing.net

tls, http2

3.2kB
7.0kB
20
14
150.171.28.10:443

https://tse1.mm.bing.net/th?id=OADD2.10239317301477_14PVM3YMRTCSD2NZ8&pid=21.2&c=3&w=1080&h=1920&dynsize=1&qlt=90

tls, http2

57.3kB
1.5MB
1117
1112

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239340418603_15DZPLB0SHJXVDM66&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=1920&h=1080&dynsize=1&qlt=90

HTTP Response

200

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301477_14PVM3YMRTCSD2NZ8&pid=21.2&c=3&w=1080&h=1920&dynsize=1&qlt=90

HTTP Response

200

No results found

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

HTTP Request

HTTP Response

HTTP Request

HTTP Response

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

HTTP Request

HTTP Response

HTTP Request

HTTP Response

MITRE ATT&CK Enterprise v15

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