nymaim | 7eb6c46c525082cf1854d1eedc6271876b4a06866da71f70bbf014d51ca7ab54

Analysis

max time kernel
62s
max time network
65s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
21/11/2022, 01:01

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General

Target
file.exe
Size 2.4MB
Sample221121-bc75rsbe43
SHA256 7eb6c46c525082cf1854d1eedc6271876b4a06866da71f70bbf014d51ca7ab54
MD5 dc57aa2525bef763e8be9679234ce88f
SHA1 34b4241832326eaa156d96343f96ae050ebb09b0
SHA512 fffb7cca1933374c6c8e019b68f063eae8088a4215787f55a227789c8b8c7b780096bb7d0a842d130152c1bdcfdbc7bd4b731d5a835dec1349fd4a7bbcceaa28
SSDEEP 49152:q28Zl5q/m15/IOt4QClJl9KCiOCyp0dp0bKN2BhCih+AwkVAuGUxVkBaFwnm:r8hq/SJNCzYCLpMybXy0AuGUxVkB04m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
112	is-N0AJI.tmp
1524	gusearcher85.exe
1408	IMqsRUbWA.exe

Loads dropped DLL 6 IoCs

pid	Process
1088	file.exe
112	is-N0AJI.tmp
112	is-N0AJI.tmp
112	is-N0AJI.tmp
112	is-N0AJI.tmp
1524	gusearcher85.exe

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 opened for modification	C:\Program Files (x86)\guSearcher\gusearcher85.exe	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-4MBIJ.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-726MV.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-P15SV.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-8JQF0.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-R1Q8G.tmp	is-N0AJI.tmp
File opened for modification	C:\Program Files (x86)\guSearcher\unins000.dat	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\unins000.dat	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-8NJMA.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-CC0BV.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-T6VC8.tmp	is-N0AJI.tmp
File created	C:\Program Files (x86)\guSearcher\is-81KBS.tmp	is-N0AJI.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
1960	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1524	gusearcher85.exe
1524	gusearcher85.exe
1524	gusearcher85.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1960	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 1088 wrote to memory of 112	1088	file.exe	26
PID 112 wrote to memory of 1524	112	is-N0AJI.tmp	27
PID 112 wrote to memory of 1524	112	is-N0AJI.tmp	27
PID 112 wrote to memory of 1524	112	is-N0AJI.tmp	27
PID 112 wrote to memory of 1524	112	is-N0AJI.tmp	27
PID 1524 wrote to memory of 1408	1524	gusearcher85.exe	28
PID 1524 wrote to memory of 1408	1524	gusearcher85.exe	28
PID 1524 wrote to memory of 1408	1524	gusearcher85.exe	28
PID 1524 wrote to memory of 1408	1524	gusearcher85.exe	28
PID 1524 wrote to memory of 1376	1524	gusearcher85.exe	31
PID 1524 wrote to memory of 1376	1524	gusearcher85.exe	31
PID 1524 wrote to memory of 1376	1524	gusearcher85.exe	31
PID 1524 wrote to memory of 1376	1524	gusearcher85.exe	31
PID 1376 wrote to memory of 1960	1376	cmd.exe	33
PID 1376 wrote to memory of 1960	1376	cmd.exe	33
PID 1376 wrote to memory of 1960	1376	cmd.exe	33
PID 1376 wrote to memory of 1960	1376	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\is-8PAF7.tmp\is-N0AJI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8PAF7.tmp\is-N0AJI.tmp" /SL4 $80116 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2252097 318464
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:112
- - C:\Program Files (x86)\guSearcher\gusearcher85.exe
    "C:\Program Files (x86)\guSearcher\gusearcher85.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1524
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\IMqsRUbWA.exe
      4⤵
      Executes dropped EXE
      PID:1408
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gusearcher85.exe" /f & erase "C:\Program Files (x86)\guSearcher\gusearcher85.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1376
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "gusearcher85.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

gusearcher85.exe

Path C:\Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.2MB
SHA256 102f7d92976642069351d94226173a8c40cebbc3d662f0d14c9381dfb3e89b8b
MD5 4a71f24c210484f31f8dde418828429b
SHA1 fb7890c76ac08b75f85c68407f343b358a800ba0
SHA512 c3b16ab31e6aed17f36b52f53389ffd113f0a21251a5bf57d3b30193e53f37b2201717b5fd0dbeeaf912c93f7f8faf7c868d5315f35f2ad759e586635372484b
SSDEEP 98304:gkikbuO7BUMMS5dhQ61oF7WcDgTk7E+qP3orhNtf9:q8nRi6VArztf9
MD5 SHA1 SHA512 SSDEEP

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gusearcher85.exe

Path C:\Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.2MB
SHA256 102f7d92976642069351d94226173a8c40cebbc3d662f0d14c9381dfb3e89b8b
MD5 4a71f24c210484f31f8dde418828429b
SHA1 fb7890c76ac08b75f85c68407f343b358a800ba0
SHA512 c3b16ab31e6aed17f36b52f53389ffd113f0a21251a5bf57d3b30193e53f37b2201717b5fd0dbeeaf912c93f7f8faf7c868d5315f35f2ad759e586635372484b
SSDEEP 98304:gkikbuO7BUMMS5dhQ61oF7WcDgTk7E+qP3orhNtf9:q8nRi6VArztf9
MD5 SHA1 SHA512 SSDEEP

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is-N0AJI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8PAF7.tmp\is-N0AJI.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

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is-N0AJI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8PAF7.tmp\is-N0AJI.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

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IMqsRUbWA.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\IMqsRUbWA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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gusearcher85.exe

Path \Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.2MB
SHA256 102f7d92976642069351d94226173a8c40cebbc3d662f0d14c9381dfb3e89b8b
MD5 4a71f24c210484f31f8dde418828429b
SHA1 fb7890c76ac08b75f85c68407f343b358a800ba0
SHA512 c3b16ab31e6aed17f36b52f53389ffd113f0a21251a5bf57d3b30193e53f37b2201717b5fd0dbeeaf912c93f7f8faf7c868d5315f35f2ad759e586635372484b
SSDEEP 98304:gkikbuO7BUMMS5dhQ61oF7WcDgTk7E+qP3orhNtf9:q8nRi6VArztf9
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-N0AJI.tmp

Path \Users\Admin\AppData\Local\Temp\is-8PAF7.tmp\is-N0AJI.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-TVVCK.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-TVVCK.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-TVVCK.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

Submit Download

IMqsRUbWA.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\IMqsRUbWA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/112-77-0x0000000003120000-0x0000000004252000-memory.dmp

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memory/112-70-0x0000000003120000-0x0000000004252000-memory.dmp

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memory/1088-65-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1088-87-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1088-54-0x0000000076681000-0x0000000076683000-memory.dmp

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memory/1088-55-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1524-71-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1524-78-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1524-79-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1524-83-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1524-73-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1524-86-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1524-72-0x0000000000400000-0x0000000001532000-memory.dmp

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