b4373e36a5aa7a4ed214da50dc54d3f89503f2cff576d5523b51f1dab202b048

Analysis

max time kernel
141s
max time network
150s
platform
windows7_x64
resource
win7-en-20211208
submitted
25/12/2021, 04:31

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General

Target
ab618bcaf48dd623353077814ff9f65e.exe
Size 6.4MB
Sample211225-e5dneagfe5
SHA256 b4373e36a5aa7a4ed214da50dc54d3f89503f2cff576d5523b51f1dab202b048
MD5 ab618bcaf48dd623353077814ff9f65e
SHA1 30191bed4a2aa055b5f4467074a766c098621d3f
SHA512 a667e49862d1adb621193a4238535fb0e949106629543b6ec9b55f343819437472db3f039719086311a82b0915d85285c94295e3cb65c6fa4bfc49ca5c64baf5
MD5 SHA1 SHA512

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1644	ast.exe

Loads dropped DLL 16 IoCs

pid	Process
1628	ab618bcaf48dd623353077814ff9f65e.exe
1628	ab618bcaf48dd623353077814ff9f65e.exe
1628	ab618bcaf48dd623353077814ff9f65e.exe
1628	ab618bcaf48dd623353077814ff9f65e.exe
1628	ab618bcaf48dd623353077814ff9f65e.exe
872	cmd.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe
1644	ast.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\ast = "C:\\Users\\Admin\\AppData\\Roaming\\swtu8\\ast.exe"	ast.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1644	ast.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1628	ab618bcaf48dd623353077814ff9f65e.exe
Token: SeDebugPrivilege	1644	ast.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1644	ast.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 872	1628	ab618bcaf48dd623353077814ff9f65e.exe	27
PID 1628 wrote to memory of 872	1628	ab618bcaf48dd623353077814ff9f65e.exe	27
PID 1628 wrote to memory of 872	1628	ab618bcaf48dd623353077814ff9f65e.exe	27
PID 1628 wrote to memory of 872	1628	ab618bcaf48dd623353077814ff9f65e.exe	27
PID 872 wrote to memory of 1644	872	cmd.exe	29
PID 872 wrote to memory of 1644	872	cmd.exe	29
PID 872 wrote to memory of 1644	872	cmd.exe	29
PID 872 wrote to memory of 1644	872	cmd.exe	29

C:\Users\Admin\AppData\Local\Temp\ab618bcaf48dd623353077814ff9f65e.exe
"C:\Users\Admin\AppData\Local\Temp\ab618bcaf48dd623353077814ff9f65e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C "C:\Users\Admin\AppData\Roaming\swtu8\xofgfu.bat"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:872
- - C:\Users\Admin\AppData\Roaming\swtu8\ast.exe
    "C:\Users\Admin\AppData\Roaming\swtu8\ast.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1628-54-0x00000000751B1000-0x00000000751B3000-memory.dmp

Download

memory/1644-98-0x0000000000350000-0x0000000000351000-memory.dmp

Download

memory/1644-90-0x0000000000320000-0x0000000000321000-memory.dmp

Download

memory/1644-99-0x0000000000B90000-0x0000000000C30000-memory.dmp

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memory/1644-100-0x0000000000250000-0x0000000000251000-memory.dmp

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memory/1644-101-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/1644-92-0x0000000000330000-0x0000000000331000-memory.dmp

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memory/1644-91-0x00000000003F0000-0x00000000003F1000-memory.dmp

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memory/1644-97-0x0000000000B90000-0x0000000000C30000-memory.dmp

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memory/1644-93-0x00000000003C0000-0x00000000003C1000-memory.dmp

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memory/1644-96-0x00000000003D0000-0x00000000003D1000-memory.dmp

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memory/1644-95-0x0000000000390000-0x0000000000391000-memory.dmp

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memory/1644-109-0x00000000003A0000-0x00000000003A1000-memory.dmp

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memory/1644-94-0x00000000003B0000-0x00000000003B1000-memory.dmp

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