nymaim | e5425d34e8268a64e6fdbd6f0637631f899d3730c828ac520b36cc73f86d4d49

General

Target

file.exe
Size

3.5MB
MD5

ed4a938d76578fc7bdf0e58b27d901a6
SHA1

4f7f17e9f2dedace7228114d0df325e9fb5909cb
SHA256

e5425d34e8268a64e6fdbd6f0637631f899d3730c828ac520b36cc73f86d4d49
SHA512

f496debe9606915c2c094275ef121a214626f25d7c6b4c31c20485a7ec28bc75ef670926c9050d196ebb100012cb8b9f137e517ee7c1aa8031d5722a29d3964a
SSDEEP

98304:e/6D9JF3+fRcdYrSaTihIbpukWcnylso/Xp66lCn:7DTFufRWRaUQYso/56N

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
3560	is-HA5OR.tmp
4768	PrintFolders.exe
2212	5QwikO.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3560	is-HA5OR.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-SE82B.tmp	is-HA5OR.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JUACK.tmp	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AC8OH.tmp	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PRHQL.tmp	is-HA5OR.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\is-L55QE.tmp	is-HA5OR.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GLIC3.tmp	is-HA5OR.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
2736	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4768	PrintFolders.exe
4768	PrintFolders.exe
4768	PrintFolders.exe
4768	PrintFolders.exe
4768	PrintFolders.exe
4768	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4768	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3504 wrote to memory of 3560	3504	file.exe	78
PID 3504 wrote to memory of 3560	3504	file.exe	78
PID 3504 wrote to memory of 3560	3504	file.exe	78
PID 3560 wrote to memory of 4768	3560	is-HA5OR.tmp	79
PID 3560 wrote to memory of 4768	3560	is-HA5OR.tmp	79
PID 3560 wrote to memory of 4768	3560	is-HA5OR.tmp	79
PID 4768 wrote to memory of 2212	4768	PrintFolders.exe	80
PID 4768 wrote to memory of 2212	4768	PrintFolders.exe	80
PID 4768 wrote to memory of 2212	4768	PrintFolders.exe	80
PID 4768 wrote to memory of 1960	4768	PrintFolders.exe	83
PID 4768 wrote to memory of 1960	4768	PrintFolders.exe	83
PID 4768 wrote to memory of 1960	4768	PrintFolders.exe	83
PID 1960 wrote to memory of 2736	1960	cmd.exe	85
PID 1960 wrote to memory of 2736	1960	cmd.exe	85
PID 1960 wrote to memory of 2736	1960	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Users\Admin\AppData\Local\Temp\is-5BQ2B.tmp\is-HA5OR.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5BQ2B.tmp\is-HA5OR.tmp" /SL4 $30034 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3460920 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3560
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4768
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\5QwikO.exe
      4⤵
      Executes dropped EXE
      PID:2212
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1960
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2736

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

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
6.1MB

MD5
b34d65bb1b199b70e09d0babce25df3f

SHA1
65c07415de876410efa7d958d478b4d44c53c7da

SHA256
17edc6b0df50b3fb5843eb6288bd445bbd4a7997b9b6cc570d9d101ae8c7cd47

SHA512
c6e6ff7007d796e87c4217033d4ca1049bf6c56ecf5bec8f2d8a2eec16bf9a57a259e3f4a1b9fa707fd3952412259afc31d8ab8ada4cc629ff2b4f87abd6983b

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

Filesize
6.1MB

MD5
b34d65bb1b199b70e09d0babce25df3f

SHA1
65c07415de876410efa7d958d478b4d44c53c7da

SHA256
17edc6b0df50b3fb5843eb6288bd445bbd4a7997b9b6cc570d9d101ae8c7cd47

SHA512
c6e6ff7007d796e87c4217033d4ca1049bf6c56ecf5bec8f2d8a2eec16bf9a57a259e3f4a1b9fa707fd3952412259afc31d8ab8ada4cc629ff2b4f87abd6983b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5BQ2B.tmp\is-HA5OR.tmp

Filesize
687KB

MD5
075f33da1ee1e9c480243cac029b3c3e

SHA1
496cba41dd1b8878f7e10c3affb293231ca97ed3

SHA256
cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2

SHA512
3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5BQ2B.tmp\is-HA5OR.tmp

Filesize
687KB

MD5
075f33da1ee1e9c480243cac029b3c3e

SHA1
496cba41dd1b8878f7e10c3affb293231ca97ed3

SHA256
cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2

SHA512
3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-D3USB.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\5QwikO.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\5QwikO.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3504-157-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3504-132-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3504-145-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3504-134-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4768-144-0x0000000000400000-0x0000000001810000-memory.dmp

Filesize
20.1MB

Download
memory/4768-149-0x0000000000400000-0x0000000001810000-memory.dmp

Filesize
20.1MB

Download
memory/4768-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4768-143-0x0000000000400000-0x0000000001810000-memory.dmp

Filesize
20.1MB

Download
memory/4768-156-0x0000000000400000-0x0000000001810000-memory.dmp

Filesize
20.1MB

Download
memory/4768-142-0x0000000000400000-0x0000000001810000-memory.dmp

Filesize
20.1MB

Download

Analysis

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