fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0

General

Target

fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe
Size

192KB
MD5

9e8baf127b832943d4fae218ce90191a
SHA1

449e6f1c2c79cb0ee4d43151bcaa6ecfd38efa70
SHA256

fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0
SHA512

9af9e3e30c34ecad41277c0bb8e27eabaf7fa05249153ffac20262af4ed3680a5a85cc5c192b04b3da3835396ef68e4e4a8b9123c663d8cf2f3a8681db7f8114
SSDEEP

6144:b05H0JNb+gzTy9ZRTbPG9rYxf2hnbSayKTTfq+T/ur:A+uHG9rYxf2hnbSayKTTfq+T/ur

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

yar.exeyar.exe

pid process

4988 yar.exe
688 yar.exe

pid	process
4988	yar.exe
688	yar.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\yar = "C:\\Users\\Admin\\AppData\\Roaming\\yar.exe"	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

880 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2748 timeout.exe

pid	process
880	schtasks.exe

pid	process
2748	timeout.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exeyar.exeyar.exe

description	pid	process
Token: SeDebugPrivilege	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe
Token: SeDebugPrivilege	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe
Token: SeDebugPrivilege	4988	yar.exe
Token: SeDebugPrivilege	688	yar.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.execmd.exe

description	pid	process	target process
PID 4972 wrote to memory of 880	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	schtasks.exe
PID 4972 wrote to memory of 880	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	schtasks.exe
PID 4972 wrote to memory of 2420	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	schtasks.exe
PID 4972 wrote to memory of 2420	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	schtasks.exe
PID 4972 wrote to memory of 1564	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	cmd.exe
PID 4972 wrote to memory of 1564	4972	fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe	cmd.exe
PID 1564 wrote to memory of 2748	1564	cmd.exe	timeout.exe
PID 1564 wrote to memory of 2748	1564	cmd.exe	timeout.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe
"C:\Users\Admin\AppData\Local\Temp\fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "yar" /tr "C:\Users\Admin\AppData\Roaming\yar.exe"
  2⤵
  - Creates scheduled task(s)
  PID:880
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "yar"
  2⤵
  PID:2420
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2AEE.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2748

C:\Users\Admin\AppData\Roaming\yar.exe
C:\Users\Admin\AppData\Roaming\yar.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4988

C:\Users\Admin\AppData\Roaming\yar.exe
C:\Users\Admin\AppData\Roaming\yar.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\yar.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2AEE.tmp.bat

Filesize
216B

MD5
efbf20e32b5e743a391c5d358da07a51

SHA1
819eb674c9477b86d7c8f29b73b94da46f8bb28f

SHA256
5466fa3e59e8e3ae4b79a0b23957ad5a04d255cd251914cea2aabfef2d04a3f8

SHA512
1499308adc6c79931f616f7651d6ebf9e2ff15d027b8428668f137455da46d4279649f60f55a5bcd7130f8aea4eff553f1b650968cfe3031fa888e92fde75338

Download Submit
C:\Users\Admin\AppData\Roaming\yar.exe

Filesize
192KB

MD5
9e8baf127b832943d4fae218ce90191a

SHA1
449e6f1c2c79cb0ee4d43151bcaa6ecfd38efa70

SHA256
fbbb58d64ed3d52ebf0c4442588f4a19e48fd64023188fb750926b13c40df8a0

SHA512
9af9e3e30c34ecad41277c0bb8e27eabaf7fa05249153ffac20262af4ed3680a5a85cc5c192b04b3da3835396ef68e4e4a8b9123c663d8cf2f3a8681db7f8114

Download Submit
memory/4972-0-0x00007FFCC6453000-0x00007FFCC6455000-memory.dmp

Filesize
8KB

Download
memory/4972-1-0x00000000001B0000-0x00000000001E8000-memory.dmp

Filesize
224KB

Download
memory/4972-2-0x0000000000B00000-0x0000000000B06000-memory.dmp

Filesize
24KB

Download
memory/4972-3-0x00007FFCC6450000-0x00007FFCC6F12000-memory.dmp

Filesize
10.8MB

Download
memory/4972-5-0x00007FFCC6453000-0x00007FFCC6455000-memory.dmp

Filesize
8KB

Download
memory/4972-6-0x00007FFCC6450000-0x00007FFCC6F12000-memory.dmp

Filesize
10.8MB

Download
memory/4972-18-0x00007FFCC6450000-0x00007FFCC6F12000-memory.dmp

Filesize
10.8MB

Download
memory/4988-9-0x00007FFCC6450000-0x00007FFCC6F12000-memory.dmp

Filesize
10.8MB

Download
memory/4988-11-0x00007FFCC6450000-0x00007FFCC6F12000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads