e94674b83aae47c337812a1db03117fc0c34a26da0fc2cdb395b89bccb667cfc

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/03/2024, 18:39

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b5661fb07d2b3d1a440e2f3e3e3da6f7.exe
Size

1.6MB
MD5

b5661fb07d2b3d1a440e2f3e3e3da6f7
SHA1

f0b641f0023ce69887f1df1bb3933b60096139ee
SHA256

e94674b83aae47c337812a1db03117fc0c34a26da0fc2cdb395b89bccb667cfc
SHA512

70a6200bcc41d8b5c28b514c33a999a23916aeb4475d41f11614874072394a6a709e9c2c9710de6007289410578600db555946c51758d14614107b3af6e7019a
SSDEEP

49152:31R+OAGKRwtsCds9U68eu8SExZGJbPq89o9m8erS:37+o5sCds268evSExwV9o9mw

Score

7^/10

aspackv2 bootkit persistence

Malware Config

Signatures

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x000e00000001449a-30.dat	aspack_v212_v242

Deletes itself 1 IoCs

pid	Process
2496	cmd.exe

Executes dropped EXE 3 IoCs

pid	Process
2864	ssinitar.exe
2436	setup.exe
2408	setup.exe

Loads dropped DLL 9 IoCs

pid	Process
1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe
2560	Rundll32.exe
2436	setup.exe
2436	setup.exe
2436	setup.exe
2436	setup.exe
2408	setup.exe
2408	setup.exe
2408	setup.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	setup.exe

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	setup.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	setup.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2408	setup.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2408	setup.exe
2408	setup.exe
2408	setup.exe
2408	setup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2408	setup.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 2864	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	28
PID 1904 wrote to memory of 2864	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	28
PID 1904 wrote to memory of 2864	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	28
PID 1904 wrote to memory of 2864	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	28
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 1904 wrote to memory of 2560	1904	b5661fb07d2b3d1a440e2f3e3e3da6f7.exe	29
PID 2560 wrote to memory of 2496	2560	Rundll32.exe	30
PID 2560 wrote to memory of 2496	2560	Rundll32.exe	30
PID 2560 wrote to memory of 2496	2560	Rundll32.exe	30
PID 2560 wrote to memory of 2496	2560	Rundll32.exe	30
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2420 wrote to memory of 2436	2420	taskeng.exe	33
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34
PID 2436 wrote to memory of 2408	2436	setup.exe	34

C:\Users\Admin\AppData\Local\Temp\b5661fb07d2b3d1a440e2f3e3e3da6f7.exe
"C:\Users\Admin\AppData\Local\Temp\b5661fb07d2b3d1a440e2f3e3e3da6f7.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Users\Admin\AppData\Local\Temp\sqvrai\ssinitar.exe
  C:\Users\Admin\AppData\Local\Temp\sqvrai\ssinitar.exe -pasdfghij -d"C:\Users\Admin\AppData\Local\Temp\sqvrai\"
  2⤵
  - Executes dropped EXE
  PID:2864
- C:\Windows\SysWOW64\Rundll32.exe
  Rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sqvrai\notedll.txt",acMainDos C:\Users\Admin\AppData\Local\Temp\b5661fb07d2b3d1a440e2f3e3e3da6f7.exe
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2560
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c .\danulev1.bat
    3⤵
    - Deletes itself
    PID:2496

C:\Windows\system32\taskeng.exe
taskeng.exe {91DB220F-E560-4F13-8F97-593377445DDB} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.exe
  C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies data under HKEY_USERS
  - Suspicious use of WriteProcessMemory
  PID:2436
- - C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.exe
    "C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.exe" SEC
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Writes to the Master Boot Record (MBR)
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    PID:2408

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\danulev1.bat

Filesize
344B

MD5
449fe679afc100b65e59421c60c0c215

SHA1
3b046cfd02a2df2a78604bb070b3e7a160c0dca1

SHA256
4d536d67eb4e488aaee49817e341b8aa4eb16e0eaddb735a66c737c6213ffef4

SHA512
b5f7832fbaa1330c61c7ddfe1154193d4233f2147964ca8ea477ed55bed2688f746acf8c17dcde1484eb44e1a8bced163a4f6efbd091d0e3625267c95fd65f08

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqvrai\notedll.txt

Filesize
517KB

MD5
fad6130d7954215d7a13cd622948312d

SHA1
a64e39162ff567e643d587a28afe7bfe271aa4b8

SHA256
c8016e1971bb43819778d92eb834a6a98ddf66aca87505baa9bfa6b697f06825

SHA512
2d6bdca6b9aa319bfcc4d097b7a70a6f9b5dbc70dc97085b6df62620c50ad0fd0e381118ae750c1e04174c1af20f08885db56141d57a173159a3f6b15db533e2

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqvrai\notedll.txt

Filesize
517KB

MD5
46128d040ea5851dad0891837c40670a

SHA1
bf99d3fd6bc7b27cefd686d933288dc9f035a2f2

SHA256
3bfd4acc4b74cc45893496a6ec119357ab03bceae064c4302591dca90df86d3b

SHA512
81680b3c085ef4af3499031bd8454ec48e317dc892c60a2eb86699b2b029348eef274aa7a196b59eca121d2f76c67e81fe206b2352bd8e2092563786d57ab37a

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.exe

Filesize
550KB

MD5
4e472e003ee3994635ecb967c8581e1b

SHA1
4d9c60640ab8f0df4dd4fb0ecabd1b49818d48e7

SHA256
dfe6bf380fbde2ccfed76143b0e933231a6b72d970ec8949781c994d83ea9894

SHA512
671b8b0087a1aa14574a613f23b8a30a8622e79e701a071d8aeffc0a0b1aa1b60abf51052c17e341f6c958754e1131b2173c21d3a0ff19c50bba94eb0c6509ba

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqvrai\setup.txt

Filesize
550KB

MD5
531734e8f228e931663971f7162879fe

SHA1
e049aa2ffdfe9a95d6d7ba49a1e5f553f16a2cf6

SHA256
af1e5c6a29f8b30bed623a644bfe7d7bc6d194db8798f9eb3692877dd4ce3672

SHA512
634354f9feeacd8ba626bf830506dfa7adfbc1e26fc904b54d5f5ff9cc011afed13bd39cc708e5e8bac588ad898480bcb59d8ceeeb91014eefbe5364f13eecae

Download Submit
\Users\Admin\AppData\Local\Temp\sqvrai\ssinitar.exe

Filesize
1.2MB

MD5
ef8d72a962c1c0b2e7d8858fc1eef73d

SHA1
29c67925d39458abf799a66e689a714558131f73

SHA256
1de80dd1f16cbb2d17d80e2559bf7689dba8883e84de8ce557e02fd71506f9dd

SHA512
12d2fccf6055bf63d0a8eefc469eae45394b0b0da41fdc429c47f318caeaf712515c478e14766ea8e980a95626e1746d546238b2af42019666682a61ff78d8de

Download Submit
memory/1904-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/1904-29-0x0000000000400000-0x00000000005A2000-memory.dmp

Filesize
1.6MB

Download
memory/2408-41-0x0000000000400000-0x0000000000574000-memory.dmp

Filesize
1.5MB

Download
memory/2408-42-0x0000000000400000-0x0000000000574000-memory.dmp

Filesize
1.5MB

Download
memory/2436-40-0x0000000000400000-0x0000000000574000-memory.dmp

Filesize
1.5MB

Download
memory/2560-20-0x0000000000410000-0x0000000000496000-memory.dmp

Filesize
536KB

Download
memory/2864-13-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download