7ba60c548a30dfd291328ea52c96c5aa5f3eb1beeb71f195802842b645d27a8e

Analysis

max time kernel
121s
max time network
131s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-10-2024 01:25

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General

Target

$R0/Uninstall TETR.IO.exe
Size

232KB
MD5

646334e9d8a2803e277f20317c787211
SHA1

f47cc9063e7cc550069c03ad094e0fd38707706d
SHA256

9d7680e56e736c78d000f99ed8d0dd0a6f6e6c39adf74c19f116329e9205d9b3
SHA512

9dfe860cc7985af930ea88aeac9912529cb600d34034f1456109832cb52795520c03be217608ca6ef1eaf94f424aee19a0676662c773a4f70a345d6c787750f1
SSDEEP

3072:fn77v00hEoDEtauR2BhV7cCaH2tvhOEA1RJCir86SrSrv6Ia3Uls:f740IB2Bh91s2t0EyL+yab

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2248	Un_A.exe

Loads dropped DLL 7 IoCs

pid	Process
2128	Uninstall TETR.IO.exe
2248	Un_A.exe
2248	Un_A.exe
2248	Un_A.exe
2248	Un_A.exe
2248	Un_A.exe
2248	Un_A.exe

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
2812	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 TETR.IO.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
2248	Un_A.exe
2812	tasklist.exe
2812	tasklist.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2812	tasklist.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 2248	2128	Uninstall TETR.IO.exe	31
PID 2128 wrote to memory of 2248	2128	Uninstall TETR.IO.exe	31
PID 2128 wrote to memory of 2248	2128	Uninstall TETR.IO.exe	31
PID 2128 wrote to memory of 2248	2128	Uninstall TETR.IO.exe	31
PID 2248 wrote to memory of 2712	2248	Un_A.exe	32
PID 2248 wrote to memory of 2712	2248	Un_A.exe	32
PID 2248 wrote to memory of 2712	2248	Un_A.exe	32
PID 2248 wrote to memory of 2712	2248	Un_A.exe	32
PID 2712 wrote to memory of 2812	2712	cmd.exe	34
PID 2712 wrote to memory of 2812	2712	cmd.exe	34
PID 2712 wrote to memory of 2812	2712	cmd.exe	34
PID 2712 wrote to memory of 2812	2712	cmd.exe	34
PID 2712 wrote to memory of 2816	2712	cmd.exe	35
PID 2712 wrote to memory of 2816	2712	cmd.exe	35
PID 2712 wrote to memory of 2816	2712	cmd.exe	35
PID 2712 wrote to memory of 2816	2712	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall TETR.IO.exe
"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall TETR.IO.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2128
- 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:2248
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq TETR.IO.exe" | %SYSTEMROOT%\System32\find.exe "TETR.IO.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2712
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq TETR.IO.exe"
      4⤵
      Enumerates processes with tasklist
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2812
  - - C:\Windows\SysWOW64\find.exe
      C:\Windows\System32\find.exe "TETR.IO.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2816

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsyE3BB.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

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\Users\Admin\AppData\Local\Temp\nsyE3BB.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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\Users\Admin\AppData\Local\Temp\nsyE3BB.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

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\Users\Admin\AppData\Local\Temp\nsyE3BB.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
232KB

MD5
646334e9d8a2803e277f20317c787211

SHA1
f47cc9063e7cc550069c03ad094e0fd38707706d

SHA256
9d7680e56e736c78d000f99ed8d0dd0a6f6e6c39adf74c19f116329e9205d9b3

SHA512
9dfe860cc7985af930ea88aeac9912529cb600d34034f1456109832cb52795520c03be217608ca6ef1eaf94f424aee19a0676662c773a4f70a345d6c787750f1

Download Submit