nymaim | 1699ab2468f1f8f8847c9cb5cf3b6c0ce1963c6aea731a817041d32ff68266a4

Analysis

max time kernel
146s
max time network
150s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/10/2022, 04:36

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General

Target
file.exe
Size 220KB
Sample221003-e7874agcc5
SHA256 1699ab2468f1f8f8847c9cb5cf3b6c0ce1963c6aea731a817041d32ff68266a4
MD5 fa2547ce4b4fd3ffb98fffeb8576472b
SHA1 be0a85f273974537a150f458ff42e23ce8d0e3e5
SHA512 f226d048774de62619e5c59bb2bf07606ec21e7f999b14ef8743e6026263941c6a7c0a7894c7341046107d5de4faa9d2c7e7f999635e0c1ebf3debd0e1d7bc22
SSDEEP 6144:EKlh0QawIBpg4nFMkGwYEU4x6WMKRfNrywk0is2:qQaw+pg4nF33YEQtKRzkp
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
2024	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1800	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
652	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/0x000800000001446b-62.dat	autoit_exe
behavioral1/files/0x000800000001446b-64.dat	autoit_exe
behavioral1/files/0x000800000001446b-65.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
980	2024	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
1820	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2020	file.exe
2020	file.exe
2020	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2024	Cleaner.exe
Token: SeDebugPrivilege	1820	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 652	2020	file.exe	28
PID 2020 wrote to memory of 652	2020	file.exe	28
PID 2020 wrote to memory of 652	2020	file.exe	28
PID 2020 wrote to memory of 652	2020	file.exe	28
PID 652 wrote to memory of 2024	652	cmd.exe	30
PID 652 wrote to memory of 2024	652	cmd.exe	30
PID 652 wrote to memory of 2024	652	cmd.exe	30
PID 652 wrote to memory of 2024	652	cmd.exe	30
PID 2024 wrote to memory of 980	2024	Cleaner.exe	32
PID 2024 wrote to memory of 980	2024	Cleaner.exe	32
PID 2024 wrote to memory of 980	2024	Cleaner.exe	32
PID 2020 wrote to memory of 1800	2020	file.exe	33
PID 2020 wrote to memory of 1800	2020	file.exe	33
PID 2020 wrote to memory of 1800	2020	file.exe	33
PID 2020 wrote to memory of 1800	2020	file.exe	33
PID 1800 wrote to memory of 1820	1800	cmd.exe	35
PID 1800 wrote to memory of 1820	1800	cmd.exe	35
PID 1800 wrote to memory of 1820	1800	cmd.exe	35
PID 1800 wrote to memory of 1820	1800	cmd.exe	35

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:2020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\4KB9GvdkcbCG8KJoiwTIvVrLezYi\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:652
- - C:\Users\Admin\AppData\Local\Temp\4KB9GvdkcbCG8KJoiwTIvVrLezYi\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\4KB9GvdkcbCG8KJoiwTIvVrLezYi\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2024
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2024 -s 1144
      4⤵
      Program crash
      PID:980
- 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:1800
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1820

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\4KB9GvdkcbCG8KJoiwTIvVrLezYi\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\4KB9GvdkcbCG8KJoiwTIvVrLezYi\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\4KB9GvdkcbCG8KJoiwTIvVrLezYi\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\4KB9GvdkcbCG8KJoiwTIvVrLezYi\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/2020-59-0x000000000075D000-0x0000000000784000-memory.dmp

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memory/2020-56-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/2020-60-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2020-54-0x0000000075451000-0x0000000075453000-memory.dmp

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memory/2020-55-0x000000000075D000-0x0000000000784000-memory.dmp

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memory/2020-76-0x000000000075D000-0x0000000000784000-memory.dmp

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memory/2020-58-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/2020-77-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2020-57-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2020-71-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2024-66-0x0000000000F50000-0x00000000010A6000-memory.dmp

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memory/2024-69-0x0000000000490000-0x00000000004D2000-memory.dmp

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memory/2024-67-0x000007FEFBAB1000-0x000007FEFBAB3000-memory.dmp

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