9f000e49c75142dd94ed9688dea77505afd31642bc9e953a69a5d2863156b0e0

Analysis

max time kernel
139s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
09/03/2024, 10:51

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

$R0/Uninstall InstaIIer.exe
Size

133KB
MD5

4b3f4eb44463b97f02d1d64d1c5687ea
SHA1

70eee4b08621a93d74c65aed75944412c71df512
SHA256

5456fd375644d9753f3d7138b53ee0848772f3cd0b3b09fbba4a68f268fd47b9
SHA512

08d178eac58bdaab05621c31cd06c46490182d5f44284ce9eae940f9a047100ecfe15c966bd11da84fb628f85d270ae1823e62d68ed797982d3f10a55b5e80f3
SSDEEP

3072:qn77v00hEoDEtaukJSuDhBNQaH2tvhOEA1RJCir86SrSrv6Ia3T:q740IUJfh0s2t0EyL+yaj

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1308	Un_A.exe

Loads dropped DLL 6 IoCs

pid	Process
1308	Un_A.exe
1308	Un_A.exe
1308	Un_A.exe
1308	Un_A.exe
1308	Un_A.exe
1308	Un_A.exe

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

System Information Discovery
T1082

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
1188	tasklist.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1308	Un_A.exe
1308	Un_A.exe
1188	tasklist.exe
1188	tasklist.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1188	tasklist.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 1308	3496	Uninstall InstaIIer.exe	80
PID 3496 wrote to memory of 1308	3496	Uninstall InstaIIer.exe	80
PID 3496 wrote to memory of 1308	3496	Uninstall InstaIIer.exe	80
PID 1308 wrote to memory of 2988	1308	Un_A.exe	81
PID 1308 wrote to memory of 2988	1308	Un_A.exe	81
PID 1308 wrote to memory of 2988	1308	Un_A.exe	81
PID 2988 wrote to memory of 1188	2988	cmd.exe	83
PID 2988 wrote to memory of 1188	2988	cmd.exe	83
PID 2988 wrote to memory of 1188	2988	cmd.exe	83
PID 2988 wrote to memory of 700	2988	cmd.exe	84
PID 2988 wrote to memory of 700	2988	cmd.exe	84
PID 2988 wrote to memory of 700	2988	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall InstaIIer.exe
"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall InstaIIer.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3496
- C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
  "C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\$R0\
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1308
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq InstaIIer.exe" | %SYSTEMROOT%\System32\find.exe "InstaIIer.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2988
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq InstaIIer.exe"
      4⤵
      Enumerates processes with tasklist
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1188
  - - C:\Windows\SysWOW64\find.exe
      C:\Windows\System32\find.exe "InstaIIer.exe"
      4⤵
      PID:700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Process Discovery

T1057

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsaC777.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaC777.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaC777.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaC777.tmp\nsExec.dll

Filesize
6KB

MD5
ec0504e6b8a11d5aad43b296beeb84b2

SHA1
91b5ce085130c8c7194d66b2439ec9e1c206497c

SHA256
5d9ceb1ce5f35aea5f9e5a0c0edeeec04dfefe0c77890c80c70e98209b58b962

SHA512
3f918f1b47e8a919cbe51eb17dc30acc8cfc18e743a1bae5b787d0db7d26038dc1210be98bf5ba3be8d6ed896dbbd7ac3d13e66454a98b2a38c7e69dad30bb57

Download Submit
C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

Filesize
133KB

MD5
4b3f4eb44463b97f02d1d64d1c5687ea

SHA1
70eee4b08621a93d74c65aed75944412c71df512

SHA256
5456fd375644d9753f3d7138b53ee0848772f3cd0b3b09fbba4a68f268fd47b9

SHA512
08d178eac58bdaab05621c31cd06c46490182d5f44284ce9eae940f9a047100ecfe15c966bd11da84fb628f85d270ae1823e62d68ed797982d3f10a55b5e80f3

Download Submit