yunsip | 83158401f1e2c620df1771471c1fd9472964ec4eaab34ff0d135edaac0cf3f64

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/02/2025, 05:27

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General

Target

JaffaCakes118_31e7cb595610232b2fa89419dc18a8d7.dll
Size

385KB
MD5

31e7cb595610232b2fa89419dc18a8d7
SHA1

34e01d2d614524572d5b3206d6c5004bafd71008
SHA256

83158401f1e2c620df1771471c1fd9472964ec4eaab34ff0d135edaac0cf3f64
SHA512

ef3712578408c632bd6cb6288445b260d42cb73f55ffae409e2502b2801f2e97216b2524058325edaf15b3e0bbe50baf9b81dfde435efa40a520050764d77f5a
SSDEEP

3072:jDKpt9sSR0HUHPwZWLnWVfEAzV2IJIwTBftpmc+z+f3Q0E:jDgtfRQUHPw06MoV2nwTBlhm88

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 7 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30
PID 2136 wrote to memory of 2264	2136	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_31e7cb595610232b2fa89419dc18a8d7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_31e7cb595610232b2fa89419dc18a8d7.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2264

Network

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

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