e89906ee3446e948d8c4fb647b46e0b0ea3ddbff5fbaf6459e10ba6f114e5f12

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
09-05-2024 10:12

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General

Target

$R0/Uninstall ret.exe
Size

135KB
MD5

9628c79ef78fec3e0ef7cb889f1ac116
SHA1

7f0e24238fd5942e4df0c295d586db729185a97c
SHA256

f0c45ee87e8491a9952a7b8829a86459e0e0cbdad0e107da087e6655b300dbe3
SHA512

b6239b6fea0e56e896c3afb3c5276b067e6967f1e4dd43bd386855c1a7cd8e4a65834cf52f494685c0373d89617ac9e3c1b97840e6d1187642761e1b297419ad
SSDEEP

3072:In77v00hEoDEtauAceAnMtMq8tHrT3waH2tvhOEA1RJCir86SrSrv6Ia3A:I740IwmnMtMJfAs2t0EyL+yaw

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2092	Un_A.exe

Loads dropped DLL 7 IoCs

pid	Process
1720	Uninstall ret.exe
2092	Un_A.exe
2092	Un_A.exe
2092	Un_A.exe
2092	Un_A.exe
2092	Un_A.exe
2092	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
2828	tasklist.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2092	Un_A.exe
2828	tasklist.exe
2828	tasklist.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2828	tasklist.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2092	1720	Uninstall ret.exe	28
PID 1720 wrote to memory of 2092	1720	Uninstall ret.exe	28
PID 1720 wrote to memory of 2092	1720	Uninstall ret.exe	28
PID 1720 wrote to memory of 2092	1720	Uninstall ret.exe	28
PID 2092 wrote to memory of 2672	2092	Un_A.exe	29
PID 2092 wrote to memory of 2672	2092	Un_A.exe	29
PID 2092 wrote to memory of 2672	2092	Un_A.exe	29
PID 2092 wrote to memory of 2672	2092	Un_A.exe	29
PID 2672 wrote to memory of 2828	2672	cmd.exe	31
PID 2672 wrote to memory of 2828	2672	cmd.exe	31
PID 2672 wrote to memory of 2828	2672	cmd.exe	31
PID 2672 wrote to memory of 2828	2672	cmd.exe	31
PID 2672 wrote to memory of 2624	2672	cmd.exe	32
PID 2672 wrote to memory of 2624	2672	cmd.exe	32
PID 2672 wrote to memory of 2624	2672	cmd.exe	32
PID 2672 wrote to memory of 2624	2672	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall ret.exe
"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall ret.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1720
- 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:2092
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq ret.exe" /FO csv | %SYSTEMROOT%\System32\find.exe "ret.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2672
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq ret.exe" /FO csv
      4⤵
      Enumerates processes with tasklist
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2828
  - - C:\Windows\SysWOW64\find.exe
      C:\Windows\System32\find.exe "ret.exe"
      4⤵
      PID:2624

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsd2434.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

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\Users\Admin\AppData\Local\Temp\nsd2434.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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\Users\Admin\AppData\Local\Temp\nsd2434.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

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\Users\Admin\AppData\Local\Temp\nsd2434.tmp\nsExec.dll

Filesize
6KB

MD5
ec0504e6b8a11d5aad43b296beeb84b2

SHA1
91b5ce085130c8c7194d66b2439ec9e1c206497c

SHA256
5d9ceb1ce5f35aea5f9e5a0c0edeeec04dfefe0c77890c80c70e98209b58b962

SHA512
3f918f1b47e8a919cbe51eb17dc30acc8cfc18e743a1bae5b787d0db7d26038dc1210be98bf5ba3be8d6ed896dbbd7ac3d13e66454a98b2a38c7e69dad30bb57

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\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

Filesize
135KB

MD5
9628c79ef78fec3e0ef7cb889f1ac116

SHA1
7f0e24238fd5942e4df0c295d586db729185a97c

SHA256
f0c45ee87e8491a9952a7b8829a86459e0e0cbdad0e107da087e6655b300dbe3

SHA512
b6239b6fea0e56e896c3afb3c5276b067e6967f1e4dd43bd386855c1a7cd8e4a65834cf52f494685c0373d89617ac9e3c1b97840e6d1187642761e1b297419ad

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