nymaim | 282bd64999bee6b848ed49ab45931dc1cbe372e2314b79b4b4044b96b9a6f30d

General

Target

file.exe
Size

1.5MB
MD5

51d9391c71e4041f5c6f9ea521b87596
SHA1

c1cff57087b81419d326888d8cddf707eed70410
SHA256

282bd64999bee6b848ed49ab45931dc1cbe372e2314b79b4b4044b96b9a6f30d
SHA512

9ec56de8eadb17519b864076047ae91f8b05a88731c40f66bc5903320a80088592dc6b287a3a806999745efb5872d0d44f1c009684a4948e672e632bb3f12a34
SSDEEP

24576:g20hhVgSj1rQy8XZN8xQOoANXu+a5Gt+Znq9a0/aJeupGvJYf+kATuCqtn/:g2QVZj1rQpzrL8tqqD0J8FkATuCE/

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
1708	file.tmp
4744	NitFiles451.exe
4956	hKNq9ryQH3CW.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	NitFiles451.exe

Loads dropped DLL 1 IoCs

pid	Process
1708	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Nit Files\language\is-MA9RC.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Nit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Nit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-DBGUD.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-2I42H.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-41V9E.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-1C003.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-EFL99.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-RCB6C.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-G0PE6.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-QU59E.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-5CBGD.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Nit Files\NitFiles451.exe	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-EBK9U.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-7LKA6.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-9FRBB.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-2LIUR.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
2208	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4744	NitFiles451.exe
4744	NitFiles451.exe
4744	NitFiles451.exe
4744	NitFiles451.exe
4744	NitFiles451.exe
4744	NitFiles451.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 1708	4664	file.exe	80
PID 4664 wrote to memory of 1708	4664	file.exe	80
PID 4664 wrote to memory of 1708	4664	file.exe	80
PID 1708 wrote to memory of 4744	1708	file.tmp	81
PID 1708 wrote to memory of 4744	1708	file.tmp	81
PID 1708 wrote to memory of 4744	1708	file.tmp	81
PID 4744 wrote to memory of 4956	4744	NitFiles451.exe	82
PID 4744 wrote to memory of 4956	4744	NitFiles451.exe	82
PID 4744 wrote to memory of 4956	4744	NitFiles451.exe	82
PID 4744 wrote to memory of 1740	4744	NitFiles451.exe	89
PID 4744 wrote to memory of 1740	4744	NitFiles451.exe	89
PID 4744 wrote to memory of 1740	4744	NitFiles451.exe	89
PID 1740 wrote to memory of 2208	1740	cmd.exe	91
PID 1740 wrote to memory of 2208	1740	cmd.exe	91
PID 1740 wrote to memory of 2208	1740	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Users\Admin\AppData\Local\Temp\is-VFEUQ.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-VFEUQ.tmp\file.tmp" /SL5="$B0068,1283700,233984,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Program Files (x86)\Nit Files\NitFiles451.exe
    "C:\Program Files (x86)\Nit Files\NitFiles451.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4744
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\hKNq9ryQH3CW.exe
      4⤵
      Executes dropped EXE
      PID:4956
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "NitFiles451.exe" /f & erase "C:\Program Files (x86)\Nit Files\NitFiles451.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1740
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "NitFiles451.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2208

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Nit Files\NitFiles451.exe

Filesize
2.1MB

MD5
848d28294dc251ca5a41cde83fe70f8a

SHA1
92719e959e9168bd08236e27c9805a6085fdfeac

SHA256
30cd6c27a407faf6e76390aac6e337e5c0468ca2cdc117b31015cf2ebf662f3e

SHA512
66170e94ab4b116d506cf11ce15ba9ef0f3d68cb298bc996b8ff4ae4772b763b16968ba1591e7433955d6d7ced3ba7b41fd282604cf4cb3e1d8ed200783a0925

Download Submit
C:\Program Files (x86)\Nit Files\NitFiles451.exe

Filesize
2.1MB

MD5
848d28294dc251ca5a41cde83fe70f8a

SHA1
92719e959e9168bd08236e27c9805a6085fdfeac

SHA256
30cd6c27a407faf6e76390aac6e337e5c0468ca2cdc117b31015cf2ebf662f3e

SHA512
66170e94ab4b116d506cf11ce15ba9ef0f3d68cb298bc996b8ff4ae4772b763b16968ba1591e7433955d6d7ced3ba7b41fd282604cf4cb3e1d8ed200783a0925

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-U60ML.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-VFEUQ.tmp\file.tmp

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-VFEUQ.tmp\file.tmp

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\hKNq9ryQH3CW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\hKNq9ryQH3CW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4664-132-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4664-157-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4664-152-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4664-137-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4744-143-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/4744-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4744-153-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/4744-144-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/4744-142-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/4744-156-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download

Analysis

Sharing