e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391

Analysis

max time kernel
165s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 16:14

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General

Target

e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe
Size

43KB
MD5

80a0ec46d9a3ccf934a093fb9a0aea50
SHA1

d6c9af634ad4fc99254aa1a93905a107d9c39e7e
SHA256

e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391
SHA512

7f092123026db26c344016c38c98f858e44b4062c380fd49106d5e5f637ea13dd868e62b5aa4f4c14e3c233993951f6a344f378ac4376c930f18bcdfd0e79deb
SSDEEP

768:TCiVL8OfeVLmSQ4CzsrLW92Ta2MP5k1a6HAjHeWqvtW1ZXTcZ1Lu3NvY41c0MHCT:3czC2LlDQ6iZyy3hY4uHCCrk

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4088	yahoo.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
380	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4afca2279e6b065d025db73d7d443075.exe	yahoo.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4afca2279e6b065d025db73d7d443075.exe	yahoo.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4afca2279e6b065d025db73d7d443075 = "\"C:\\Users\\Admin\\yahoo.exe\" .."	yahoo.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\4afca2279e6b065d025db73d7d443075 = "\"C:\\Users\\Admin\\yahoo.exe\" .."	yahoo.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 23 IoCs

pid	Process
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe
4088	yahoo.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4088	yahoo.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 4088	1728	e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe	79
PID 1728 wrote to memory of 4088	1728	e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe	79
PID 1728 wrote to memory of 4088	1728	e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe	79
PID 4088 wrote to memory of 380	4088	yahoo.exe	80
PID 4088 wrote to memory of 380	4088	yahoo.exe	80
PID 4088 wrote to memory of 380	4088	yahoo.exe	80

C:\Users\Admin\AppData\Local\Temp\e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe
"C:\Users\Admin\AppData\Local\Temp\e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Users\Admin\yahoo.exe
  "C:\Users\Admin\yahoo.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4088
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\yahoo.exe" "yahoo.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:380

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\yahoo.exe

Filesize
43KB

MD5
80a0ec46d9a3ccf934a093fb9a0aea50

SHA1
d6c9af634ad4fc99254aa1a93905a107d9c39e7e

SHA256
e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391

SHA512
7f092123026db26c344016c38c98f858e44b4062c380fd49106d5e5f637ea13dd868e62b5aa4f4c14e3c233993951f6a344f378ac4376c930f18bcdfd0e79deb

Download Submit
C:\Users\Admin\yahoo.exe

Filesize
43KB

MD5
80a0ec46d9a3ccf934a093fb9a0aea50

SHA1
d6c9af634ad4fc99254aa1a93905a107d9c39e7e

SHA256
e9cfd9c3fa2c0245f9fe8d005af91400773c90e98af4cd3dc8bb4134f61a5391

SHA512
7f092123026db26c344016c38c98f858e44b4062c380fd49106d5e5f637ea13dd868e62b5aa4f4c14e3c233993951f6a344f378ac4376c930f18bcdfd0e79deb

Download Submit
memory/1728-132-0x0000000075160000-0x0000000075711000-memory.dmp

Filesize
5.7MB

Download
memory/1728-136-0x0000000075160000-0x0000000075711000-memory.dmp

Filesize
5.7MB

Download
memory/4088-138-0x0000000075160000-0x0000000075711000-memory.dmp

Filesize
5.7MB

Download
memory/4088-139-0x0000000075160000-0x0000000075711000-memory.dmp

Filesize
5.7MB

Download