daa8802270996f3d7b4835fd9fba42da054ad1a58403854c0f86b0666c631ac1

Analysis

max time kernel
151s
max time network
171s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
26-11-2022 11:26

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General

Target

112.exe
Size

187KB
MD5

1b16b152c1fde08b8089adf6132f5d4d
SHA1

025f3f3760221f62415376ac2ecb6bd8d426762e
SHA256

1fc0ea9775d1a71a08af06b83e829664b19a9122ce0dfececfc205aa72fcbc44
SHA512

7af997e7b9daa383f6956d9c267ae14d83c223a625a47d5c5c7b9a1391c04332f4315d0ae314d2ab7ea1648c9db2d3b60251e431d288909dd9f31ce8cddaff4e
SSDEEP

3072:EDQkrZoosbIfXJMq6WLs0JiG3VU2wBOZfYyqUElu/UvymUPPGwuDjwauVxrITZFE:EDpoeCOLNHFU2COZfYyTElu86mpFwa6/

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2036	ryin.exe
1692	ryin.exe

Deletes itself 1 IoCs

pid	Process
1264	cmd.exe

Loads dropped DLL 3 IoCs

pid	Process
1948	112.exe
908	112.exe
2036	ryin.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\Currentversion\Run	ryin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\{62815F61-29E8-01E3-B22D-9034FB6E0543} = "C:\\Users\\Admin\\AppData\\Roaming\\Cauh\\ryin.exe"	ryin.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1948 set thread context of 908	1948	112.exe	28
PID 2036 set thread context of 1692	2036	ryin.exe	30

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

System Information Discovery
T1082

NSIS installer 8 IoCs

installer

resource	yara_rule
behavioral23/files/0x000c00000001232f-68.dat	nsis_installer_1
behavioral23/files/0x000c00000001232f-68.dat	nsis_installer_2
behavioral23/files/0x000c00000001232f-70.dat	nsis_installer_1
behavioral23/files/0x000c00000001232f-70.dat	nsis_installer_2
behavioral23/files/0x000c00000001232f-72.dat	nsis_installer_1
behavioral23/files/0x000c00000001232f-72.dat	nsis_installer_2
behavioral23/files/0x000c00000001232f-83.dat	nsis_installer_1
behavioral23/files/0x000c00000001232f-83.dat	nsis_installer_2

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Privacy\CleanCookies = "0"	112.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Privacy	112.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe
1692	ryin.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeSecurityPrivilege	908	112.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 1948 wrote to memory of 908	1948	112.exe	28
PID 908 wrote to memory of 2036	908	112.exe	29
PID 908 wrote to memory of 2036	908	112.exe	29
PID 908 wrote to memory of 2036	908	112.exe	29
PID 908 wrote to memory of 2036	908	112.exe	29
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 2036 wrote to memory of 1692	2036	ryin.exe	30
PID 1692 wrote to memory of 1120	1692	ryin.exe	10
PID 1692 wrote to memory of 1120	1692	ryin.exe	10
PID 1692 wrote to memory of 1120	1692	ryin.exe	10
PID 1692 wrote to memory of 1120	1692	ryin.exe	10
PID 1692 wrote to memory of 1120	1692	ryin.exe	10
PID 1692 wrote to memory of 1176	1692	ryin.exe	18
PID 1692 wrote to memory of 1176	1692	ryin.exe	18
PID 1692 wrote to memory of 1176	1692	ryin.exe	18
PID 1692 wrote to memory of 1176	1692	ryin.exe	18
PID 1692 wrote to memory of 1176	1692	ryin.exe	18
PID 1692 wrote to memory of 1204	1692	ryin.exe	17
PID 1692 wrote to memory of 1204	1692	ryin.exe	17
PID 1692 wrote to memory of 1204	1692	ryin.exe	17
PID 1692 wrote to memory of 1204	1692	ryin.exe	17
PID 1692 wrote to memory of 1204	1692	ryin.exe	17
PID 1692 wrote to memory of 908	1692	ryin.exe	28
PID 1692 wrote to memory of 908	1692	ryin.exe	28
PID 1692 wrote to memory of 908	1692	ryin.exe	28
PID 1692 wrote to memory of 908	1692	ryin.exe	28
PID 1692 wrote to memory of 908	1692	ryin.exe	28
PID 908 wrote to memory of 1264	908	112.exe	31
PID 908 wrote to memory of 1264	908	112.exe	31
PID 908 wrote to memory of 1264	908	112.exe	31
PID 908 wrote to memory of 1264	908	112.exe	31
PID 1692 wrote to memory of 1264	1692	ryin.exe	31
PID 1692 wrote to memory of 1264	1692	ryin.exe	31
PID 1692 wrote to memory of 1264	1692	ryin.exe	31
PID 1692 wrote to memory of 1264	1692	ryin.exe	31
PID 1692 wrote to memory of 1264	1692	ryin.exe	31
PID 1692 wrote to memory of 1300	1692	ryin.exe	32
PID 1692 wrote to memory of 868	1692	ryin.exe	33
PID 1692 wrote to memory of 868	1692	ryin.exe	33
PID 1692 wrote to memory of 868	1692	ryin.exe	33
PID 1692 wrote to memory of 868	1692	ryin.exe	33
PID 1692 wrote to memory of 868	1692	ryin.exe	33
PID 1692 wrote to memory of 1080	1692	ryin.exe	34
PID 1692 wrote to memory of 1080	1692	ryin.exe	34
PID 1692 wrote to memory of 1080	1692	ryin.exe	34
PID 1692 wrote to memory of 1080	1692	ryin.exe	34
PID 1692 wrote to memory of 1080	1692	ryin.exe	34
PID 1692 wrote to memory of 588	1692	ryin.exe	35
PID 1692 wrote to memory of 588	1692	ryin.exe	35

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1120

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1204
- C:\Users\Admin\AppData\Local\Temp\112.exe
  "C:\Users\Admin\AppData\Local\Temp\112.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Users\Admin\AppData\Local\Temp\112.exe
    "C:\Users\Admin\AppData\Local\Temp\112.exe"
    3⤵
    - Loads dropped DLL
    - Modifies Internet Explorer settings
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:908
  - - C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe
      "C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2036
    - - C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe
        
        "C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:1692
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\tmpc877edf3.bat"
      4⤵
      Deletes itself
      PID:1264

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1176

C:\Windows\system32\conhost.exe
\??\C:\Windows\system32\conhost.exe "-3124889851794076942-1228023509-11776573181557249878-1955140193538318072-616653782"
1⤵
PID:1300

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{F9717507-6651-4EDB-BFF7-AE615179BCCF}
1⤵
PID:868

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:1080

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{F9717507-6651-4EDB-BFF7-AE615179BCCF}
1⤵
PID:588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\tmpc877edf3.bat

Filesize
185B

MD5
93bac90b76c04d323c6b83d68889e365

SHA1
c29529fbd38bff6c318beacd5df375c517c75e4c

SHA256
662bea481412385b9c73fc2bf8e21914f56a149790c2ab71edb0f6cd01a50fe0

SHA512
3c900d6b14faa28ddf2333a034ebb6cab1e66f1890baa29e75347a5593bf404fe3b8fca19a435f25a608c1a3fc7bee720d252de5b24a923b276514534279495c

Download Submit
C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe

Filesize
187KB

MD5
1265678ac187c8267a5bcf9098e59641

SHA1
ca7aa3af555469b497679421024828f8a5086871

SHA256
30e8ddfe87a2b3e69210be686fce61a3883d849e9680f27a23f37d30dc360da3

SHA512
2d13b2b5a346f28060c3ff572e90a15c14e03b61898309b895dd97524b6725b12e965c291724b6114cc9f6e3c53dadc80d01576aacb611ea5de1588b35e4a2df

Download Submit
C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe

Filesize
187KB

MD5
1265678ac187c8267a5bcf9098e59641

SHA1
ca7aa3af555469b497679421024828f8a5086871

SHA256
30e8ddfe87a2b3e69210be686fce61a3883d849e9680f27a23f37d30dc360da3

SHA512
2d13b2b5a346f28060c3ff572e90a15c14e03b61898309b895dd97524b6725b12e965c291724b6114cc9f6e3c53dadc80d01576aacb611ea5de1588b35e4a2df

Download Submit
C:\Users\Admin\AppData\Roaming\Cauh\ryin.exe

Filesize
187KB

MD5
1265678ac187c8267a5bcf9098e59641

SHA1
ca7aa3af555469b497679421024828f8a5086871

SHA256
30e8ddfe87a2b3e69210be686fce61a3883d849e9680f27a23f37d30dc360da3

SHA512
2d13b2b5a346f28060c3ff572e90a15c14e03b61898309b895dd97524b6725b12e965c291724b6114cc9f6e3c53dadc80d01576aacb611ea5de1588b35e4a2df

Download Submit
\Users\Admin\AppData\Local\Temp\nseE3AE.tmp\brokerages.dll

Filesize
16KB

MD5
1236c52aeb7ff29f443d50e4d326d0d1

SHA1
ee19d4a6a2ed9985b691b851ac0caba3268b0981

SHA256
8aba0509facbd46831ce38a569acf5909efd5c0a84aeca1fe80774b9879ed5b2

SHA512
89831f7fd674c92ef2ff08a711d326170324d0cfa0064dd38a0063b27986b4f4e7ecb538ab5bb816c8cc3059fe25bdceadc8452f40e08874f6e46c1b14dfbd17

Download Submit
\Users\Admin\AppData\Local\Temp\nso7BA8.tmp\brokerages.dll

Filesize
16KB

MD5
1236c52aeb7ff29f443d50e4d326d0d1

SHA1
ee19d4a6a2ed9985b691b851ac0caba3268b0981

SHA256
8aba0509facbd46831ce38a569acf5909efd5c0a84aeca1fe80774b9879ed5b2

SHA512
89831f7fd674c92ef2ff08a711d326170324d0cfa0064dd38a0063b27986b4f4e7ecb538ab5bb816c8cc3059fe25bdceadc8452f40e08874f6e46c1b14dfbd17

Download Submit
\Users\Admin\AppData\Roaming\Cauh\ryin.exe

Filesize
187KB

MD5
1265678ac187c8267a5bcf9098e59641

SHA1
ca7aa3af555469b497679421024828f8a5086871

SHA256
30e8ddfe87a2b3e69210be686fce61a3883d849e9680f27a23f37d30dc360da3

SHA512
2d13b2b5a346f28060c3ff572e90a15c14e03b61898309b895dd97524b6725b12e965c291724b6114cc9f6e3c53dadc80d01576aacb611ea5de1588b35e4a2df

Download Submit
memory/588-137-0x0000000000500000-0x0000000000527000-memory.dmp

Filesize
156KB

Download
memory/588-138-0x0000000000500000-0x0000000000527000-memory.dmp

Filesize
156KB

Download
memory/868-125-0x00000000002B0000-0x00000000002D7000-memory.dmp

Filesize
156KB

Download
memory/868-126-0x00000000002B0000-0x00000000002D7000-memory.dmp

Filesize
156KB

Download
memory/868-127-0x00000000002B0000-0x00000000002D7000-memory.dmp

Filesize
156KB

Download
memory/868-128-0x00000000002B0000-0x00000000002D7000-memory.dmp

Filesize
156KB

Download
memory/908-112-0x00000000002F0000-0x0000000000317000-memory.dmp

Filesize
156KB

Download
memory/908-56-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-67-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-57-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-59-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-60-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-62-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-66-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-111-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/908-109-0x00000000002F0000-0x0000000000317000-memory.dmp

Filesize
156KB

Download
memory/908-108-0x00000000002F0000-0x0000000000317000-memory.dmp

Filesize
156KB

Download
memory/908-107-0x00000000002F0000-0x0000000000317000-memory.dmp

Filesize
156KB

Download
memory/908-106-0x00000000002F0000-0x0000000000317000-memory.dmp

Filesize
156KB

Download
memory/1080-134-0x0000000000080000-0x00000000000A7000-memory.dmp

Filesize
156KB

Download
memory/1080-133-0x0000000000080000-0x00000000000A7000-memory.dmp

Filesize
156KB

Download
memory/1080-132-0x0000000000080000-0x00000000000A7000-memory.dmp

Filesize
156KB

Download
memory/1080-131-0x0000000000080000-0x00000000000A7000-memory.dmp

Filesize
156KB

Download
memory/1120-91-0x0000000001DC0000-0x0000000001DE7000-memory.dmp

Filesize
156KB

Download
memory/1120-88-0x0000000001DC0000-0x0000000001DE7000-memory.dmp

Filesize
156KB

Download
memory/1120-89-0x0000000001DC0000-0x0000000001DE7000-memory.dmp

Filesize
156KB

Download
memory/1120-90-0x0000000001DC0000-0x0000000001DE7000-memory.dmp

Filesize
156KB

Download
memory/1176-96-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1176-97-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1176-95-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1176-94-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1204-102-0x00000000025A0000-0x00000000025C7000-memory.dmp

Filesize
156KB

Download
memory/1204-100-0x00000000025A0000-0x00000000025C7000-memory.dmp

Filesize
156KB

Download
memory/1204-101-0x00000000025A0000-0x00000000025C7000-memory.dmp

Filesize
156KB

Download
memory/1204-103-0x00000000025A0000-0x00000000025C7000-memory.dmp

Filesize
156KB

Download
memory/1264-119-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1692-122-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1692-117-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1948-54-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

Filesize
8KB

Download