e55c7b3a56b807f31c8d68bf8c157da9e80522a60a3e4d3be90e101ff85c9ef8

General

Target

f9881c6c96dbc5d18764ba0a11b45f91.dll
Size

127KB
MD5

f9881c6c96dbc5d18764ba0a11b45f91
SHA1

b572ff448413b40259b48b288eb8c91e70b6186c
SHA256

e55c7b3a56b807f31c8d68bf8c157da9e80522a60a3e4d3be90e101ff85c9ef8
SHA512

4bce771d25286fce7570165e82dadf6f6dbbac1760afd7bd2f0c6262c2509b7c595b1c963b4a83314fcf5ae39779081ffdc905360351ba5fdd73e2c52fc8300c
SSDEEP

3072:ifC0OGQDdZJPESvZPHojlJ6+NOctcUoDthgM3X73OL5PFn0wcccccccc:MfOBvvVHojq+FoDAs30PFn0wcccccccc

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	1636	rundll32.exe
3	2748	rundll32.exe

Loads dropped DLL 4 IoCs

pid	Process
2748	rundll32.exe
2748	rundll32.exe
2748	rundll32.exe
2748	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Windows\CurrentVersion\Run\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D} = "rundll32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D}\\5b09.dll\",DllGetClassObject secret 40558"	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1636	rundll32.exe
2748	rundll32.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 2496 wrote to memory of 1636	2496	rundll32.exe	28
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29
PID 1636 wrote to memory of 2748	1636	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f9881c6c96dbc5d18764ba0a11b45f91.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f9881c6c96dbc5d18764ba0a11b45f91.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Adds Run key to start application
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D}\5b09.dll",DllGetClassObject secret 40558
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D}\5b09.dll

Filesize
127KB

MD5
f9881c6c96dbc5d18764ba0a11b45f91

SHA1
b572ff448413b40259b48b288eb8c91e70b6186c

SHA256
e55c7b3a56b807f31c8d68bf8c157da9e80522a60a3e4d3be90e101ff85c9ef8

SHA512
4bce771d25286fce7570165e82dadf6f6dbbac1760afd7bd2f0c6262c2509b7c595b1c963b4a83314fcf5ae39779081ffdc905360351ba5fdd73e2c52fc8300c

Download Submit
memory/1636-1-0x0000000001F30000-0x0000000002030000-memory.dmp

Filesize
1024KB

Download
memory/1636-0-0x0000000074D20000-0x0000000074D4B000-memory.dmp

Filesize
172KB

Download
memory/1636-3-0x0000000074D20000-0x0000000074D4B000-memory.dmp

Filesize
172KB

Download
memory/1636-11-0x0000000001F30000-0x0000000002030000-memory.dmp

Filesize
1024KB

Download
memory/1636-15-0x0000000074D20000-0x0000000074D4B000-memory.dmp

Filesize
172KB

Download
memory/2748-12-0x0000000074920000-0x000000007494B000-memory.dmp

Filesize
172KB

Download
memory/2748-13-0x00000000009A0000-0x0000000000AA0000-memory.dmp

Filesize
1024KB

Download
memory/2748-16-0x0000000074920000-0x000000007494B000-memory.dmp

Filesize
172KB

Download
memory/2748-18-0x0000000074920000-0x000000007494B000-memory.dmp

Filesize
172KB

Download
memory/2748-20-0x00000000009A0000-0x0000000000AA0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads