nymaim | e624b64f0e1bbdf526afe45534f4900222135df0f189496b4a2a3a76dedeaebe

Analysis

max time kernel
135s
max time network
159s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/10/2022, 01:54

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General

Target
file.exe
Size 351KB
Sample221004-cbjlfsgcf5
SHA256 e624b64f0e1bbdf526afe45534f4900222135df0f189496b4a2a3a76dedeaebe
MD5 941c4f4309163952cc116d0be6e7c14d
SHA1 f16768f45d3f03925c53f3f6bee18e1bbb85cb0d
SHA512 ce4fe4ad2b48fc6260a079c7b4c7735bf6a3e003414757f00ea4b0fd51f9d8a72ec40f9c65670baf75ca247a814713f9af4f6151b0a355541b41f99b591a6c62
SSDEEP 6144:PCmEjWqmXBAkWR3r8A1bzjoBbn6a3AGuzbgwuFvZwVf:PPEjW1QR34A1LIbnZ9unn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
316	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1056	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1476	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000a0000000122ff-61.dat	autoit_exe
behavioral1/files/0x000a0000000122ff-63.dat	autoit_exe
behavioral1/files/0x000a0000000122ff-64.dat	autoit_exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
548	316	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1896	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1692	file.exe
1692	file.exe
1692	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	316	Cleaner.exe
Token: SeDebugPrivilege	1896	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 1476	1692	file.exe	30
PID 1692 wrote to memory of 1476	1692	file.exe	30
PID 1692 wrote to memory of 1476	1692	file.exe	30
PID 1692 wrote to memory of 1476	1692	file.exe	30
PID 1476 wrote to memory of 316	1476	cmd.exe	32
PID 1476 wrote to memory of 316	1476	cmd.exe	32
PID 1476 wrote to memory of 316	1476	cmd.exe	32
PID 1476 wrote to memory of 316	1476	cmd.exe	32
PID 316 wrote to memory of 548	316	Cleaner.exe	34
PID 316 wrote to memory of 548	316	Cleaner.exe	34
PID 316 wrote to memory of 548	316	Cleaner.exe	34
PID 1692 wrote to memory of 1056	1692	file.exe	35
PID 1692 wrote to memory of 1056	1692	file.exe	35
PID 1692 wrote to memory of 1056	1692	file.exe	35
PID 1692 wrote to memory of 1056	1692	file.exe	35
PID 1056 wrote to memory of 1896	1056	cmd.exe	37
PID 1056 wrote to memory of 1896	1056	cmd.exe	37
PID 1056 wrote to memory of 1896	1056	cmd.exe	37
PID 1056 wrote to memory of 1896	1056	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:316
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 316 -s 1156
      4⤵
      Program crash
      PID:548
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1056
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1896

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\F4a0PReuqsDQvs0UtJulS\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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memory/316-68-0x0000000000930000-0x0000000000972000-memory.dmp

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memory/316-66-0x000007FEFC371000-0x000007FEFC373000-memory.dmp

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memory/316-65-0x0000000000BF0000-0x0000000000D46000-memory.dmp

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memory/1692-59-0x0000000000400000-0x000000000045D000-memory.dmp

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memory/1692-58-0x00000000002EC000-0x0000000000312000-memory.dmp

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memory/1692-55-0x00000000002EC000-0x0000000000312000-memory.dmp

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memory/1692-57-0x0000000000400000-0x000000000045D000-memory.dmp

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memory/1692-56-0x00000000001B0000-0x00000000001EF000-memory.dmp

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memory/1692-54-0x0000000075921000-0x0000000075923000-memory.dmp

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memory/1692-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1692-75-0x00000000002EC000-0x0000000000312000-memory.dmp

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memory/1692-76-0x0000000000400000-0x000000000045D000-memory.dmp

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