537390956b58697330ca0fb2d85956641bf9a9eec88c6bba7b45df1b2010e373

Analysis

max time kernel
16s
max time network
22s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
01/09/2024, 13:55

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General

Target

$R0/Uninstall BSManager.exe
Size

584KB
MD5

a947ed3de14e984b28b0cccbabadd45f
SHA1

ab1e3a911663a5f3fa9650d47b31484a895e9a57
SHA256

7f69283f62dd43d980de3e7059ffef82e93dd4ab9c72a75e0ed2e227c140d280
SHA512

64fc459e10b81600fb3232442c9e4ef6103012920c334386eb30c8d47731f9b879b65eca1979cb28701107819b7d1fdbc6db192344175e92dd9a141de1967f6b
SSDEEP

6144:W740I9z04cUL+cdAJvmus2t0EyL+ya0L2:8q1LtdOvyRKJ0a

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2140	Un_A.exe

Loads dropped DLL 7 IoCs

pid	Process
2488	Uninstall BSManager.exe
2140	Un_A.exe
2140	Un_A.exe
2140	Un_A.exe
2140	Un_A.exe
2140	Un_A.exe
2140	Un_A.exe

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
2868	tasklist.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Uninstall BSManager.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Un_A.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	find.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasklist.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2140	Un_A.exe
2868	tasklist.exe
2868	tasklist.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2868	tasklist.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2140	2488	Uninstall BSManager.exe	29
PID 2488 wrote to memory of 2140	2488	Uninstall BSManager.exe	29
PID 2488 wrote to memory of 2140	2488	Uninstall BSManager.exe	29
PID 2488 wrote to memory of 2140	2488	Uninstall BSManager.exe	29
PID 2140 wrote to memory of 2840	2140	Un_A.exe	30
PID 2140 wrote to memory of 2840	2140	Un_A.exe	30
PID 2140 wrote to memory of 2840	2140	Un_A.exe	30
PID 2140 wrote to memory of 2840	2140	Un_A.exe	30
PID 2840 wrote to memory of 2868	2840	cmd.exe	32
PID 2840 wrote to memory of 2868	2840	cmd.exe	32
PID 2840 wrote to memory of 2868	2840	cmd.exe	32
PID 2840 wrote to memory of 2868	2840	cmd.exe	32
PID 2840 wrote to memory of 2828	2840	cmd.exe	33
PID 2840 wrote to memory of 2828	2840	cmd.exe	33
PID 2840 wrote to memory of 2828	2840	cmd.exe	33
PID 2840 wrote to memory of 2828	2840	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall BSManager.exe
"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall BSManager.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2488
- 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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq BSManager.exe" | %SYSTEMROOT%\System32\find.exe "BSManager.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2840
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq BSManager.exe"
      4⤵
      Enumerates processes with tasklist
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2868
  - - C:\Windows\SysWOW64\find.exe
      C:\Windows\System32\find.exe "BSManager.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2828

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsuC2E3.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

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\Users\Admin\AppData\Local\Temp\nsuC2E3.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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\Users\Admin\AppData\Local\Temp\nsuC2E3.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

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\Users\Admin\AppData\Local\Temp\nsuC2E3.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
584KB

MD5
a947ed3de14e984b28b0cccbabadd45f

SHA1
ab1e3a911663a5f3fa9650d47b31484a895e9a57

SHA256
7f69283f62dd43d980de3e7059ffef82e93dd4ab9c72a75e0ed2e227c140d280

SHA512
64fc459e10b81600fb3232442c9e4ef6103012920c334386eb30c8d47731f9b879b65eca1979cb28701107819b7d1fdbc6db192344175e92dd9a141de1967f6b

Download Submit