489e7edb065a88926e1a51a37c110aa68e482a5f62df43f0481d3816d5c2b4b3

Analysis

max time kernel
1794s
max time network
1798s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
29/04/2024, 04:24

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General

Target

bookmarks_4_29_24.scr
Size

165KB
MD5

0f6e9fde0e2f3f69b2f1ac3cfacda796
SHA1

0db715938b9c310575530dd1c7a3d18bbc00f010
SHA256

489e7edb065a88926e1a51a37c110aa68e482a5f62df43f0481d3816d5c2b4b3
SHA512

03f10564fe99d5cb8cdcca0b6a7143670b6f41a1ec6323d1197dc8600ae27ee1f6a42f136819bf6ff4e82d42c404a98ce69fcb58e3bbb4b58389f24b6128b9c7
SSDEEP

3072:9ZqD5CQ9YAsARA1RUGKXs+S++7KFSbxeY+qDDrM:XxQ9YMGqStKEbxI

Score

8^/10

evasion persistence

Malware Config

Signatures

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
5008	attrib.exe
4904	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2268	$77SysWOW64.scr

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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\System\\$77SysWOW64.scr\""	bookmarks_4_29_24.scr

Legitimate hosting services abused for malware hosting/C2 1 TTPs 64 IoCs

Web Service

T1102

flow	ioc
133	pastebin.com
76	pastebin.com
78	pastebin.com
94	pastebin.com
103	pastebin.com
106	pastebin.com
123	pastebin.com
82	pastebin.com
93	pastebin.com
91	pastebin.com
20	pastebin.com
81	pastebin.com
141	pastebin.com
49	pastebin.com
138	pastebin.com
112	pastebin.com
144	pastebin.com
4	pastebin.com
80	pastebin.com
37	pastebin.com
119	pastebin.com
155	pastebin.com
158	pastebin.com
33	pastebin.com
64	pastebin.com
68	pastebin.com
75	pastebin.com
90	pastebin.com
120	pastebin.com
137	pastebin.com
19	pastebin.com
61	pastebin.com
43	pastebin.com
162	pastebin.com
130	pastebin.com
131	pastebin.com
39	pastebin.com
46	pastebin.com
113	pastebin.com
136	pastebin.com
87	pastebin.com
109	pastebin.com
121	pastebin.com
15	pastebin.com
99	pastebin.com
58	pastebin.com
67	pastebin.com
74	pastebin.com
154	pastebin.com
173	pastebin.com
22	pastebin.com
51	pastebin.com
55	pastebin.com
100	pastebin.com
10	pastebin.com
25	pastebin.com
16	pastebin.com
30	pastebin.com
34	pastebin.com
38	pastebin.com
59	pastebin.com
125	pastebin.com
12	pastebin.com
13	pastebin.com

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 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2852	schtasks.exe
1780	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1604	timeout.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4732	bookmarks_4_29_24.scr
4272	powershell.exe
4272	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4732	bookmarks_4_29_24.scr
Token: SeDebugPrivilege	2268	$77SysWOW64.scr
Token: SeDebugPrivilege	4272	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4732 wrote to memory of 5008	4732	bookmarks_4_29_24.scr	80
PID 4732 wrote to memory of 5008	4732	bookmarks_4_29_24.scr	80
PID 4732 wrote to memory of 4904	4732	bookmarks_4_29_24.scr	82
PID 4732 wrote to memory of 4904	4732	bookmarks_4_29_24.scr	82
PID 4732 wrote to memory of 3164	4732	bookmarks_4_29_24.scr	84
PID 4732 wrote to memory of 3164	4732	bookmarks_4_29_24.scr	84
PID 3164 wrote to memory of 1604	3164	cmd.exe	86
PID 3164 wrote to memory of 1604	3164	cmd.exe	86
PID 3164 wrote to memory of 2268	3164	cmd.exe	87
PID 3164 wrote to memory of 2268	3164	cmd.exe	87
PID 2268 wrote to memory of 3580	2268	$77SysWOW64.scr	88
PID 2268 wrote to memory of 3580	2268	$77SysWOW64.scr	88
PID 2268 wrote to memory of 2852	2268	$77SysWOW64.scr	90
PID 2268 wrote to memory of 2852	2268	$77SysWOW64.scr	90
PID 2268 wrote to memory of 2424	2268	$77SysWOW64.scr	92
PID 2268 wrote to memory of 2424	2268	$77SysWOW64.scr	92
PID 2268 wrote to memory of 4272	2268	$77SysWOW64.scr	94
PID 2268 wrote to memory of 4272	2268	$77SysWOW64.scr	94
PID 2268 wrote to memory of 1780	2268	$77SysWOW64.scr	96
PID 2268 wrote to memory of 1780	2268	$77SysWOW64.scr	96

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

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5008	attrib.exe
4904	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bookmarks_4_29_24.scr
"C:\Users\Admin\AppData\Local\Temp\bookmarks_4_29_24.scr" /S
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:5008
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System\$77SysWOW64.scr"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4904
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB13F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3164
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1604
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System\$77SysWOW64.scr
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System\$77SysWOW64.scr"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2268
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77SysWOW64.scr
      4⤵
      PID:3580
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77SysWOW64.scr" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System\$77SysWOW64.scr \"\$77SysWOW64.scr\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Creates scheduled task(s)
      PID:2852
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77SysWOW64.scr
      4⤵
      PID:2424
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4272
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "SysWOW64_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Creates scheduled task(s)
      PID:1780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aluvypsk.xc4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB13F.tmp.bat

Filesize
190B

MD5
d1038bd89f9f9a0d77ebf6b0031f1eef

SHA1
04d840cf12a4039b62f2c7bf8a4d54d9116f67e2

SHA256
6eb6b78d710491a3ef8b0865e28b8e0b0e459ab2766955255f82ffc80f496433

SHA512
fcd74d67f0619ff1746f220a78d0016b2da97ad30019c548757f1881aaa2a51b4c7aaa00d51f8c5043fbf176de64f43bfb07a1190ca20fbe1e4a4692a0e77b7c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\System\$77SysWOW64.scr

Filesize
165KB

MD5
0f6e9fde0e2f3f69b2f1ac3cfacda796

SHA1
0db715938b9c310575530dd1c7a3d18bbc00f010

SHA256
489e7edb065a88926e1a51a37c110aa68e482a5f62df43f0481d3816d5c2b4b3

SHA512
03f10564fe99d5cb8cdcca0b6a7143670b6f41a1ec6323d1197dc8600ae27ee1f6a42f136819bf6ff4e82d42c404a98ce69fcb58e3bbb4b58389f24b6128b9c7

Download Submit
memory/4272-13-0x000002C2B7B90000-0x000002C2B7BB2000-memory.dmp

Filesize
136KB

Download
memory/4732-0-0x0000000000FD0000-0x0000000000FFC000-memory.dmp

Filesize
176KB

Download
memory/4732-1-0x00007FFE4DB90000-0x00007FFE4E652000-memory.dmp

Filesize
10.8MB

Download
memory/4732-2-0x00000000039E0000-0x00000000039F0000-memory.dmp

Filesize
64KB

Download
memory/4732-3-0x00007FFE4DB90000-0x00007FFE4E652000-memory.dmp

Filesize
10.8MB

Download
memory/4732-9-0x00007FFE4DB90000-0x00007FFE4E652000-memory.dmp

Filesize
10.8MB

Download