307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336

Analysis

max time kernel
149s
max time network
121s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 20:08

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General

Target

307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
Size

70KB
MD5

15c5b9f07c13efa73c762681cb8339fa
SHA1

bb1a2c50de9af9bdbff7df785feece447f8b00ee
SHA256

307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336
SHA512

523348ba12a650b45ec82beba54cd16983786430f45dbe13e1e3ee642df6644bd3d0f25185401b23a52e6536b8a2bc5f851b4037fc92a7aaafcd016a470c3ba9
SSDEEP

1536:1teqKDlXvCDB04f5Gn/L8FlADNt3d1Hw8U:Olg35GTslA5t3/w8U

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "25600"	csimin.exe

Modifies Installed Components in the registry 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\StubPath = "C:\\Windows\\system32\\annahac.exe"	csimin.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{4748505A-5247-4643-4748-505A52474643}\IsInstalled = "1"	csimin.exe

Sets file execution options in registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a"	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\breceas-itor.exe"	csimin.exe

Executes dropped EXE 2 IoCs

pid	Process
2180	csimin.exe
2884	csimin.exe

Loads dropped DLL 3 IoCs

pid	Process
2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
2180	csimin.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "25600"	csimin.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "25600"	csimin.exe

Modifies WinLogon 2 TTPs 5 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}	csimin.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\DLLName = "C:\\Windows\\system32\\oukbuvon.dll"	csimin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup"	csimin.exe

Drops file in System32 directory 9 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\csimin.exe	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
File opened for modification	C:\Windows\SysWOW64\breceas-itor.exe	csimin.exe
File created	C:\Windows\SysWOW64\annahac.exe	csimin.exe
File opened for modification	C:\Windows\SysWOW64\csimin.exe	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
File created	C:\Windows\SysWOW64\breceas-itor.exe	csimin.exe
File opened for modification	C:\Windows\SysWOW64\annahac.exe	csimin.exe
File opened for modification	C:\Windows\SysWOW64\oukbuvon.dll	csimin.exe
File created	C:\Windows\SysWOW64\oukbuvon.dll	csimin.exe
File opened for modification	C:\Windows\SysWOW64\csimin.exe	csimin.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2884	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe
2180	csimin.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
Token: SeDebugPrivilege	2180	csimin.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 2180	2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe	28
PID 2740 wrote to memory of 2180	2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe	28
PID 2740 wrote to memory of 2180	2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe	28
PID 2740 wrote to memory of 2180	2740	307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe	28
PID 2180 wrote to memory of 436	2180	csimin.exe	5
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 2884	2180	csimin.exe	29
PID 2180 wrote to memory of 2884	2180	csimin.exe	29
PID 2180 wrote to memory of 2884	2180	csimin.exe	29
PID 2180 wrote to memory of 2884	2180	csimin.exe	29
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21
PID 2180 wrote to memory of 1208	2180	csimin.exe	21

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1208
- C:\Users\Admin\AppData\Local\Temp\307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe
  "C:\Users\Admin\AppData\Local\Temp\307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\SysWOW64\csimin.exe
    "C:\Windows\system32\csimin.exe"
    3⤵
    - Windows security bypass
    - Modifies Installed Components in the registry
    - Sets file execution options in registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Windows security modification
    - Modifies WinLogon
    - Drops file in System32 directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2180
  - - C:\Windows\SysWOW64\csimin.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\annahac.exe

Filesize
72KB

MD5
12ef8de7bf70a3771f4ea8e895a25e27

SHA1
0e0622b1f582a9b1ad387263f023122343b7f021

SHA256
032a7ec69cb4aabffd4dd5ca32246f2441e140554eb913c0959d48c833b18a44

SHA512
a89cd3be1ff3cfcb8a12e4f71c2a1cd8f1a6cc1fc33bc6a4df107fd90713e283154f65d8fe40a9d7d593e8189013fef34a3a76854a427048b39a972cbb5ae6c7

Download Submit
C:\Windows\SysWOW64\breceas-itor.exe

Filesize
73KB

MD5
d7e1e48beb8e1ced848fc4b469128b14

SHA1
e49fe447783354d0d3cb44b2fe7b6bf5f644320c

SHA256
78d7c37b2dedb2c7d422a2db07f3e1bfa2f1a56a47c7b60e941bafa38fac0d95

SHA512
c8b43fd0f5bf77fc5d5a5f48ff60a26585fd50233b2864411800d289b28852418e6e82f1b143ef27033e1ce22d3c4d76666e745f8c278b765ab6e6cb1e5cc6d6

Download Submit
C:\Windows\SysWOW64\oukbuvon.dll

Filesize
5KB

MD5
f37b21c00fd81bd93c89ce741a88f183

SHA1
b2796500597c68e2f5638e1101b46eaf32676c1c

SHA256
76cf016fd77cb5a06c6ed4674ddc2345e8390c010cf344491a6e742baf2c0fb0

SHA512
252fe66dea9a4b9aebc5fd2f24434719cb25159ba51549d9de407f44b6a2f7bce6e071be02c4f2ad6aef588c77f12c00ed415eb54f96dec1b077326e101ce0f4

Download Submit
\Windows\SysWOW64\csimin.exe

Filesize
70KB

MD5
15c5b9f07c13efa73c762681cb8339fa

SHA1
bb1a2c50de9af9bdbff7df785feece447f8b00ee

SHA256
307204ffd38b30a78f7306931e861f37c2cde964dc0a4b7e32323d2e4e538336

SHA512
523348ba12a650b45ec82beba54cd16983786430f45dbe13e1e3ee642df6644bd3d0f25185401b23a52e6536b8a2bc5f851b4037fc92a7aaafcd016a470c3ba9

Download Submit
memory/2180-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2740-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2884-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download