e4489273eb27325f1b08ed1c5f210924c49a50ca617099d1ff69dd922eef00dd

Analysis

max time kernel
118s
max time network
121s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
13/06/2024, 10:39

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General

Target

$R0/Uninstall Obsidian.exe
Size

195KB
MD5

a0e89151dc046737820af277fb624ecb
SHA1

2e9df955e8f71eb1efec9f17d14882440cd1944f
SHA256

1cc8ff0b9243be56c26e1b12bf0a73addbc772612551f2536ff766285af943cd
SHA512

b1f5d8406a2480c7b70b8c56f83725686246dd79302e9437c3f212a2b57e84b7863953fa7529ba34dc20722f1869aa03863ab382227ecab53fe37296624f206e
SSDEEP

3072:9n77v00hEoDEtauBggE+rSTOmzuKPlCdDVTaH2tvhOEA1RJCir86SrSrv6Ia37YQ:9740IlUTrwD5s2t0EyL+yaLYIYm

Score

4^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1680	Un_A.exe

Loads dropped DLL 7 IoCs

pid	Process
2340	Uninstall Obsidian.exe
1680	Un_A.exe
1680	Un_A.exe
1680	Un_A.exe
1680	Un_A.exe
1680	Un_A.exe
1680	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
2636	tasklist.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1680	Un_A.exe
2636	tasklist.exe
2636	tasklist.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	tasklist.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1680	2340	Uninstall Obsidian.exe	28
PID 2340 wrote to memory of 1680	2340	Uninstall Obsidian.exe	28
PID 2340 wrote to memory of 1680	2340	Uninstall Obsidian.exe	28
PID 2340 wrote to memory of 1680	2340	Uninstall Obsidian.exe	28
PID 1680 wrote to memory of 2528	1680	Un_A.exe	29
PID 1680 wrote to memory of 2528	1680	Un_A.exe	29
PID 1680 wrote to memory of 2528	1680	Un_A.exe	29
PID 1680 wrote to memory of 2528	1680	Un_A.exe	29
PID 2528 wrote to memory of 2636	2528	cmd.exe	31
PID 2528 wrote to memory of 2636	2528	cmd.exe	31
PID 2528 wrote to memory of 2636	2528	cmd.exe	31
PID 2528 wrote to memory of 2636	2528	cmd.exe	31
PID 2528 wrote to memory of 2652	2528	cmd.exe	32
PID 2528 wrote to memory of 2652	2528	cmd.exe	32
PID 2528 wrote to memory of 2652	2528	cmd.exe	32
PID 2528 wrote to memory of 2652	2528	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Obsidian.exe
"C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Obsidian.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2340
- 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:1680
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq Obsidian.exe" | %SYSTEMROOT%\System32\find.exe "Obsidian.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2528
  - - C:\Windows\SysWOW64\tasklist.exe
      tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq Obsidian.exe"
      4⤵
      Enumerates processes with tasklist
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2636
  - - C:\Windows\SysWOW64\find.exe
      C:\Windows\System32\find.exe "Obsidian.exe"
      4⤵
      PID:2652

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

\Users\Admin\AppData\Local\Temp\nstD1C.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

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\Users\Admin\AppData\Local\Temp\nstD1C.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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\Users\Admin\AppData\Local\Temp\nstD1C.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

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\Users\Admin\AppData\Local\Temp\nstD1C.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
195KB

MD5
a0e89151dc046737820af277fb624ecb

SHA1
2e9df955e8f71eb1efec9f17d14882440cd1944f

SHA256
1cc8ff0b9243be56c26e1b12bf0a73addbc772612551f2536ff766285af943cd

SHA512
b1f5d8406a2480c7b70b8c56f83725686246dd79302e9437c3f212a2b57e84b7863953fa7529ba34dc20722f1869aa03863ab382227ecab53fe37296624f206e

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