nymaim | ff7942d7c23d47e9925f87cfa6b372b8f444eae95a0d40372a0b2e6ce374f4f2

Analysis

max time kernel
137s
max time network
144s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/10/2022, 02:44

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General

Target
file.exe
Size 220KB
Sample221003-c76e4acgd5
SHA256 ff7942d7c23d47e9925f87cfa6b372b8f444eae95a0d40372a0b2e6ce374f4f2
MD5 f5944917897881a5b9d957a16e54d8ff
SHA1 23147802f1d1c7aef06b6409dfc74dc364a7ee8b
SHA512 994c03bb5f739f1af81bb3cac3af3a87c346c67a8022f29be191e126d5b4d39df313813ca251ba7a50370e62c8f3fc1126033dfa9a109a1e3c90a127c9ddf98c
SSDEEP 3072:WgJuaOR+ZsZkh1PIggk6OR6M0rWRpgnikyBpsIFAaDx70t6/AojuY3sm0P+f:AcGkXIfk6OR6M0ridk8S870t6EYcm
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
688	Cleaner.exe

Loads dropped DLL 1 IoCs

pid	Process
1536	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/0x00090000000122ef-63.dat	autoit_exe
behavioral1/files/0x00090000000122ef-62.dat	autoit_exe
behavioral1/files/0x00090000000122ef-60.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
1736	688	WerFault.exe	32

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2012	file.exe
2012	file.exe
2012	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2012	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	688	Cleaner.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 1536	2012	file.exe	30
PID 2012 wrote to memory of 1536	2012	file.exe	30
PID 2012 wrote to memory of 1536	2012	file.exe	30
PID 2012 wrote to memory of 1536	2012	file.exe	30
PID 1536 wrote to memory of 688	1536	cmd.exe	32
PID 1536 wrote to memory of 688	1536	cmd.exe	32
PID 1536 wrote to memory of 688	1536	cmd.exe	32
PID 1536 wrote to memory of 688	1536	cmd.exe	32
PID 688 wrote to memory of 1736	688	Cleaner.exe	34
PID 688 wrote to memory of 1736	688	Cleaner.exe	34
PID 688 wrote to memory of 1736	688	Cleaner.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\YMJT4nlMcQmY3Csqw\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Users\Admin\AppData\Local\Temp\YMJT4nlMcQmY3Csqw\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\YMJT4nlMcQmY3Csqw\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:688
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 688 -s 1148
      4⤵
      Program crash
      PID:1736

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\YMJT4nlMcQmY3Csqw\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\YMJT4nlMcQmY3Csqw\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\YMJT4nlMcQmY3Csqw\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\YMJT4nlMcQmY3Csqw\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

Submit Download

memory/688-64-0x0000000000D10000-0x0000000000E66000-memory.dmp

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memory/688-67-0x00000000004E0000-0x0000000000522000-memory.dmp

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memory/688-65-0x000007FEFBF21000-0x000007FEFBF23000-memory.dmp

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memory/2012-58-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2012-57-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2012-54-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

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memory/2012-55-0x0000000000A1D000-0x0000000000A44000-memory.dmp

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memory/2012-56-0x0000000000810000-0x000000000084F000-memory.dmp

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memory/2012-69-0x0000000010000000-0x000000001001B000-memory.dmp

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