nymaim | 921be38c5c84a6e09837622885c8346599f6c588729bfa788b4d1491d66d894d

General

Target

file.exe
Size

2.9MB
MD5

f0de0532d91aae1bfb035f53b62ce097
SHA1

481af9adf1d06caeee8fa944841ddf954d5c07f7
SHA256

921be38c5c84a6e09837622885c8346599f6c588729bfa788b4d1491d66d894d
SHA512

510fcf8e0b126cfd5fbc1e293271114d3dd82b727c9c1de08ebf98485ed916270cb3ae2998821804194578d78109b8fc8676848d8b1de6a570ee09fe539f50af
SSDEEP

49152:Z2QFybszX7scTC+y7nQ7BvJh4q8zKiW2L66MpIV5JsIMf8CkIG4c1pKpu9Lf3/AW:Ma8svGx7W/4qc6bIV5wf8pd48KpyYDq

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
864	is-016JA.tmp
1732	fvsearcher72.exe
1876	ZESFnruTZb5uMy.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	fvsearcher72.exe

Loads dropped DLL 1 IoCs

pid	Process
864	is-016JA.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\fvSearcher\is-3NSC4.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-UV9T2.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-TKHS0.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-Q1NA0.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-V9B2Q.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-NQKM6.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-AH60A.tmp	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-KBKD0.tmp	is-016JA.tmp
File opened for modification	C:\Program Files (x86)\fvSearcher\unins000.dat	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\unins000.dat	is-016JA.tmp
File created	C:\Program Files (x86)\fvSearcher\is-UJB17.tmp	is-016JA.tmp
File opened for modification	C:\Program Files (x86)\fvSearcher\fvsearcher72.exe	is-016JA.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
5088	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1732	fvsearcher72.exe
1732	fvsearcher72.exe
1732	fvsearcher72.exe
1732	fvsearcher72.exe
1732	fvsearcher72.exe
1732	fvsearcher72.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 864	2808	file.exe	82
PID 2808 wrote to memory of 864	2808	file.exe	82
PID 2808 wrote to memory of 864	2808	file.exe	82
PID 864 wrote to memory of 1732	864	is-016JA.tmp	83
PID 864 wrote to memory of 1732	864	is-016JA.tmp	83
PID 864 wrote to memory of 1732	864	is-016JA.tmp	83
PID 1732 wrote to memory of 1876	1732	fvsearcher72.exe	84
PID 1732 wrote to memory of 1876	1732	fvsearcher72.exe	84
PID 1732 wrote to memory of 1876	1732	fvsearcher72.exe	84
PID 1732 wrote to memory of 1688	1732	fvsearcher72.exe	92
PID 1732 wrote to memory of 1688	1732	fvsearcher72.exe	92
PID 1732 wrote to memory of 1688	1732	fvsearcher72.exe	92
PID 1688 wrote to memory of 5088	1688	cmd.exe	94
PID 1688 wrote to memory of 5088	1688	cmd.exe	94
PID 1688 wrote to memory of 5088	1688	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Local\Temp\is-6T5HP.tmp\is-016JA.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-6T5HP.tmp\is-016JA.tmp" /SL4 $1D01DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 2806103 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:864
- - C:\Program Files (x86)\fvSearcher\fvsearcher72.exe
    "C:\Program Files (x86)\fvSearcher\fvsearcher72.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1732
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZESFnruTZb5uMy.exe
      4⤵
      Executes dropped EXE
      PID:1876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fvsearcher72.exe" /f & erase "C:\Program Files (x86)\fvSearcher\fvsearcher72.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1688
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fvsearcher72.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:5088

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)\fvSearcher\fvsearcher72.exe

Filesize
4.3MB

MD5
a580e2ec8ac7a80e5c3ac4847abff6cb

SHA1
e6c89e1497fb5e4e0048744c90a267b1a41ce0fc

SHA256
e45c8233179b86af3e32490d1152cb3f2ce95aea791013e627b7aab6571ae719

SHA512
24e03900ee45e017f5823e3cbf96ff586c513c39f5e85dce2bda50ce0a2b9725bb38295a700f022a82c0d9e21a1e30a4064cb649c790d11a127cb8678329abd0

Download Submit
C:\Program Files (x86)\fvSearcher\fvsearcher72.exe

Filesize
4.3MB

MD5
a580e2ec8ac7a80e5c3ac4847abff6cb

SHA1
e6c89e1497fb5e4e0048744c90a267b1a41ce0fc

SHA256
e45c8233179b86af3e32490d1152cb3f2ce95aea791013e627b7aab6571ae719

SHA512
24e03900ee45e017f5823e3cbf96ff586c513c39f5e85dce2bda50ce0a2b9725bb38295a700f022a82c0d9e21a1e30a4064cb649c790d11a127cb8678329abd0

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6T5HP.tmp\is-016JA.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6T5HP.tmp\is-016JA.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-7UQQ6.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZESFnruTZb5uMy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZESFnruTZb5uMy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/864-134-0x0000000000000000-mapping.dmp

Download
memory/1688-153-0x0000000000000000-mapping.dmp

Download
memory/1732-143-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/1732-144-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/1732-142-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/1732-139-0x0000000000000000-mapping.dmp

Download
memory/1732-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1732-152-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/1732-155-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/1876-145-0x0000000000000000-mapping.dmp

Download
memory/2808-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2808-137-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2808-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5088-154-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing